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annotate transformations/local_elastic_distortions.py @ 24:010e826b41e8

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Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
author fsavard <francois.savard@polymtl.ca>
date Fri, 29 Jan 2010 13:37:52 -0500
parents 8d1c37190122
children b67d729ebfe3
rev   line source
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1 #!/usr/bin/python
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2 # coding: utf-8
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4 '''
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5 Implementation of elastic distortions as described in
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6 Simard, Steinkraus, Platt, "Best Practices for Convolutional
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7 Neural Networks Applied to Visual Document Analysis", 2003
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9 Author: François Savard
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
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10 Date: Fall 2009, revised Winter 2010
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8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
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12 Usage: create the Distorter with proper alpha, sigma etc.
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
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13 Then each time you want to change the distortion field applied,
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
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14 call regenerate_field().
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16 (The point behind this is that regeneration takes some time,
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
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17 so we better reuse the fields a few times)
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
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18 '''
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8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
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20 import sys
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21 import math
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22 import numpy
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23 import numpy.random
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
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24 import scipy.signal # convolve2d
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
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25
24
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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26 _TEST_DIR = "/home/francois/Desktop/dist_tests/"
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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28 def _raw_zeros(size):
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29 return [[0 for i in range(size[1])] for j in range(size[0])]
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30
24
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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31 class ElasticDistortionParams():
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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32 def __init__(self, image_size, alpha=0.0, sigma=0.0):
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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33 self.image_size = image_size
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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34 self.alpha = alpha
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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35 self.sigma = sigma
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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36
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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37 h,w = self.image_size
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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38
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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39 self.matrix_tl_corners_rows = _raw_zeros((h,w))
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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40 self.matrix_tl_corners_cols = _raw_zeros((h,w))
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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42 self.matrix_tr_corners_rows = _raw_zeros((h,w))
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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43 self.matrix_tr_corners_cols = _raw_zeros((h,w))
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45 self.matrix_bl_corners_rows = _raw_zeros((h,w))
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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46 self.matrix_bl_corners_cols = _raw_zeros((h,w))
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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48 self.matrix_br_corners_rows = _raw_zeros((h,w))
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49 self.matrix_br_corners_cols = _raw_zeros((h,w))
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50
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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51 # those will hold the precomputed ratios for
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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52 # bilinear interpolation
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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53 self.matrix_tl_multiply = numpy.zeros((h,w))
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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54 self.matrix_tr_multiply = numpy.zeros((h,w))
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55 self.matrix_bl_multiply = numpy.zeros((h,w))
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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56 self.matrix_br_multiply = numpy.zeros((h,w))
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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57
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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58 def alpha_sigma(self):
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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59 return [self.alpha, self.sigma]
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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60
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61 class LocalElasticDistorter():
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62 def __init__(self, image_size):
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63 self.image_size = image_size
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64
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65 self.current_complexity = 0.0
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66
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67 # number of precomputed fields
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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68 # (principle: as complexity doesn't change often, we can
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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69 # precompute a certain number of fields for a given complexity,
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70 # each with its own parameters. That way, we have good
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71 # randomization, but we're much faster).
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72 self.to_precompute = 50
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73
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74 # Both use ElasticDistortionParams
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75 self.current_params = None
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76 self.precomputed_params = []
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77
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78 #
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79 self.kernel_size = None
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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80 self.kernel = None
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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81
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82 # set some defaults
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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83 self.regenerate_parameters(0.0)
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84
24
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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85 def get_settings_names(self):
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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86 return ['alpha', 'sigma']
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
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87
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88 def regenerate_parameters(self, complexity):
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89 if abs(complexity - self.current_complexity) > 1e-4:
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90 self.current_complexity = complexity
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91
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92 # complexity changed, fields must be regenerated
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93 self.precomputed_params = []
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94
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95 if len(self.precomputed_params) <= self.to_precompute:
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96 # not yet enough params generated, produce one more
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97 # and append to list
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98 new_params = self._initialize_new_params()
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99 new_params = self._generate_fields(new_params)
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100 self.current_params = new_params
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101 self.precomputed_params.append(new_params)
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102 else:
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103 # if we have enough precomputed fields, just select one
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104 # at random and set parameters to match what they were
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105 # when the field was generated
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106 idx = numpy.random.randint(0, len(self.precomputed_params))
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107 self.current_params = self.precomputed_params[idx]
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108
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109 return self.current_params.alpha_sigma()
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110
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111 # adapted from http://blenderartists.org/forum/showthread.php?t=163361
24
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112 def _gen_gaussian_kernel(self, sigma):
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113 # the kernel size can change DRAMATICALLY the time
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114 # for the blur operation... so even though results are better
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115 # with a bigger kernel, we need to compromise here
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116 # 1*s is very different from 2*s, but there's not much difference
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117 # between 2*s and 4*s
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118 ks = self.kernel_size
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119 s = sigma
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120 target_ks = (1.5*s, 1.5*s)
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121 if not ks is None and ks[0] == target_ks[0] and ks[1] == target_ks[1]:
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122 # kernel size is good, ok, no need to regenerate
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123 return
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124 self.kernel_size = target_ks
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125 h,w = self.kernel_size
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126 a,b = h/2.0, w/2.0
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127 y,x = numpy.ogrid[0:w, 0:h]
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128 gauss = numpy.exp(-numpy.square((x-a)/s))*numpy.exp(-numpy.square((y-b)/s))
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129 # Normalize so we don't reduce image intensity
24
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130 self.kernel = gauss/gauss.sum()
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131
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132 def _gen_distortion_field(self, params):
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133 self._gen_gaussian_kernel(params.sigma)
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134
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135 # we add kernel_size on all four sides so blurring
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136 # with the kernel produces a smoother result on borders
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137 ks0 = self.kernel_size[0]
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138 ks1 = self.kernel_size[1]
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139 sz0 = self.image_size[1] + ks0
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140 sz1 = self.image_size[0] + ks1
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141 field = numpy.random.uniform(-1.0, 1.0, (sz0, sz1))
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142 field = scipy.signal.convolve2d(field, self.kernel, mode='same')
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143
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144 # crop only image_size in the middle
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145 field = field[ks0:ks0+self.image_size[0], ks1:ks1+self.image_size[1]]
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146
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147 return params.alpha * field
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148
5
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149
24
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150 def _initialize_new_params(self):
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151 params = ElasticDistortionParams(self.image_size)
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152
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153 cpx = self.current_complexity
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154 # pour faire progresser la complexité un peu plus vite
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155 # tout en gardant les extrêmes de 0.0 et 1.0
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156 cpx = cpx ** (1./3.)
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157
24
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158 # the smaller the alpha, the closest the pixels are fetched
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159 # a max of 10 is reasonable
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160 params.alpha = cpx * 10.0
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161
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162 # the bigger the sigma, the smoother is the distortion
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163 # max of 1 is "reasonable", but produces VERY noisy results
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164 # And the bigger the sigma, the bigger the blur kernel, and the
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165 # slower the field generation, btw.
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166 params.sigma = 10.0 - (7.0 * cpx)
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167
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168 return params
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169
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170 def _generate_fields(self, params):
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171 '''
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172 Here's how the code works:
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173 - We first generate "distortion fields" for x and y with these steps:
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174 - Uniform noise over [-1, 1] in a matrix of size (h,w)
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175 - Blur with a Gaussian kernel of spread sigma
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176 - Multiply by alpha
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177 - Then (conceptually) to compose the distorted image, we loop over each pixel
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178 of the new image and use the corresponding x and y distortions
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179 (from the matrices generated above) to identify pixels
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180 of the old image from which we fetch color data. As the
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181 coordinates are not integer, we interpolate between the
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182 4 nearby pixels (top left, top right etc.).
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183 - That's just conceptually. Here I'm using matrix operations
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184 to speed up the computation. I first identify the 4 nearby
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185 pixels in the old image for each pixel in the distorted image.
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186 I can then use them as "fancy indices" to extract the proper
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187 pixels for each new pixel.
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188 - Then I multiply those extracted nearby points by precomputed
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189 ratios for the bilinear interpolation.
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190 '''
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191
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192 p = params
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193
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194 dist_fields = [None, None]
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195 dist_fields[0] = self._gen_distortion_field(params)
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196 dist_fields[1] = self._gen_distortion_field(params)
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197
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198 #pylab.imshow(dist_fields[0])
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199 #pylab.show()
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200
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201 # regenerate distortion index matrices
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202 # "_rows" are row indices
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203 # "_cols" are column indices
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204 # (separated due to the way fancy indexing works in numpy)
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205 h,w = p.image_size
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206
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207 for y in range(h):
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208 for x in range(w):
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209 distort_x = dist_fields[0][y,x]
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210 distort_y = dist_fields[1][y,x]
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211
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212 # the "target" is the coordinate we fetch color data from
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213 # (in the original image)
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214 # target_left and _top are the rounded coordinate on the
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215 # left/top of this target (float) coordinate
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216 target_pixel = (y+distort_y, x+distort_x)
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217
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218 target_left = int(math.floor(x + distort_x))
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219 target_top = int(math.floor(y + distort_y))
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220
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221 index_tl = [target_top, target_left]
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222 index_tr = [target_top, target_left+1]
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223 index_bl = [target_top+1, target_left]
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224 index_br = [target_top+1, target_left+1]
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225
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226 # x_ratio is the ratio of importance of left pixels
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227 # y_ratio is the """" of top pixels
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228 # (in bilinear combination)
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229 y_ratio = 1.0 - (target_pixel[0] - target_top)
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230 x_ratio = 1.0 - (target_pixel[1] - target_left)
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231
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232 # We use a default background color of 0 for displacements
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233 # outside of boundaries of the image.
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234
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235 # if top left outside bounds
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236 if index_tl[0] < 0 or index_tl[0] >= h or index_tl[1] < 0 or index_tl[1] >= w:
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237 p.matrix_tl_corners_rows[y][x] = 0
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238 p.matrix_tl_corners_cols[y][x] = 0
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239 p.matrix_tl_multiply[y,x] = 0
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240 else:
24
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241 p.matrix_tl_corners_rows[y][x] = index_tl[0]
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242 p.matrix_tl_corners_cols[y][x] = index_tl[1]
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243 p.matrix_tl_multiply[y,x] = x_ratio*y_ratio
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244
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245 # if top right outside bounds
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246 if index_tr[0] < 0 or index_tr[0] >= h or index_tr[1] < 0 or index_tr[1] >= w:
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247 p.matrix_tr_corners_rows[y][x] = 0
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248 p.matrix_tr_corners_cols[y][x] = 0
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249 p.matrix_tr_multiply[y,x] = 0
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250 else:
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251 p.matrix_tr_corners_rows[y][x] = index_tr[0]
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252 p.matrix_tr_corners_cols[y][x] = index_tr[1]
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253 p.matrix_tr_multiply[y,x] = (1.0-x_ratio)*y_ratio
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254
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255 # if bottom left outside bounds
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256 if index_bl[0] < 0 or index_bl[0] >= h or index_bl[1] < 0 or index_bl[1] >= w:
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257 p.matrix_bl_corners_rows[y][x] = 0
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fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
258 p.matrix_bl_corners_cols[y][x] = 0
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
259 p.matrix_bl_multiply[y,x] = 0
5
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parents:
diff changeset
260 else:
24
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
261 p.matrix_bl_corners_rows[y][x] = index_bl[0]
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
262 p.matrix_bl_corners_cols[y][x] = index_bl[1]
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
263 p.matrix_bl_multiply[y,x] = x_ratio*(1.0-y_ratio)
5
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
264
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
265 # if bottom right outside bounds
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
266 if index_br[0] < 0 or index_br[0] >= h or index_br[1] < 0 or index_br[1] >= w:
24
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
267 p.matrix_br_corners_rows[y][x] = 0
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
268 p.matrix_br_corners_cols[y][x] = 0
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
269 p.matrix_br_multiply[y,x] = 0
5
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
270 else:
24
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
271 p.matrix_br_corners_rows[y][x] = index_br[0]
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
272 p.matrix_br_corners_cols[y][x] = index_br[1]
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
273 p.matrix_br_multiply[y,x] = (1.0-x_ratio)*(1.0-y_ratio)
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
274
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
275 # not really necessary, but anyway
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
276 return p
5
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
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parents:
diff changeset
277
24
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
278 def transform_image(self, image):
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
279 p = self.current_params
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
280
5
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
281 # index pixels to get the 4 corners for bilinear combination
24
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
282 tl_pixels = image[p.matrix_tl_corners_rows, p.matrix_tl_corners_cols]
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
283 tr_pixels = image[p.matrix_tr_corners_rows, p.matrix_tr_corners_cols]
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
284 bl_pixels = image[p.matrix_bl_corners_rows, p.matrix_bl_corners_cols]
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
285 br_pixels = image[p.matrix_br_corners_rows, p.matrix_br_corners_cols]
5
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
286
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
287 # bilinear ratios, elemwise multiply
24
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
288 tl_pixels = numpy.multiply(tl_pixels, p.matrix_tl_multiply)
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
289 tr_pixels = numpy.multiply(tr_pixels, p.matrix_tr_multiply)
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
290 bl_pixels = numpy.multiply(bl_pixels, p.matrix_bl_multiply)
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
291 br_pixels = numpy.multiply(br_pixels, p.matrix_br_multiply)
5
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
292
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
293 # sum to finish bilinear combination
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
294 return numpy.sum([tl_pixels,tr_pixels,bl_pixels,br_pixels], axis=0)
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
295
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
296 # TESTS ----------------------------------------------------------------------
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
297
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
298 def _load_image(filepath):
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fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
299 _RGB_TO_GRAYSCALE = [0.3, 0.59, 0.11, 0.0]
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
300 img = Image.open(filepath)
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
301 img = numpy.asarray(img)
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
302 if len(img.shape) > 2:
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
303 img = (img * _RGB_TO_GRAYSCALE).sum(axis=2)
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
304 return (img / 255.0).astype('float')
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
305
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
306 def _specific_test():
24
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
307 imgpath = os.path.join(_TEST_DIR, "d.png")
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
308 img = _load_image(imgpath)
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
309 dist = LocalElasticDistorter((32,32))
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
310 print dist.regenerate_parameters(0.5)
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
311 img = dist.distort_image(img)
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
312 pylab.imshow(img)
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
313 pylab.show()
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
314
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
315 def _complexity_tests():
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
316 imgpath = os.path.join(_TEST_DIR, "d.png")
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
317 dist = LocalElasticDistorter((32,32))
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
318 orig_img = _load_image(imgpath)
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
319 html_content = '''<html><body>Original:<br/><img src='d.png'>'''
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
320 for complexity in numpy.arange(0.0, 1.1, 0.1):
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
321 html_content += '<br/>Complexity: ' + str(complexity) + '<br/>'
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
322 for i in range(10):
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
323 t1 = time.time()
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
324 dist.regenerate_parameters(complexity)
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
325 t2 = time.time()
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
326 print "diff", t2-t1
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
327 img = dist.transform_image(orig_img)
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
328 filename = "complexity_" + str(complexity) + "_" + str(i) + ".png"
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
329 new_path = os.path.join(_TEST_DIR, filename)
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
330 _save_image(img, new_path)
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
331 html_content += '<img src="' + filename + '">'
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
332 html_content += "</body></html>"
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
333 html_file = open(os.path.join(_TEST_DIR, "complexity.html"), "w")
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
334 html_file.write(html_content)
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
335 html_file.close()
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
336
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
337 def _complexity_benchmark():
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
338 imgpath = os.path.join(_TEST_DIR, "d.png")
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
339 dist = LocalElasticDistorter((32,32))
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
340 orig_img = _load_image(imgpath)
5
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
341
24
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
342 # time the first 10
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
343 t1 = time.time()
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
344 for i in range(10):
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
345 dist.regenerate_parameters(0.2)
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
346 img = dist.transform_image(orig_img)
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
347 t2 = time.time()
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
348
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
349 print "first 10, total = ", t2-t1, ", avg=", (t2-t1)/10
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
350
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
351 # time the next 40
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
352 t1 = time.time()
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
353 for i in range(40):
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
354 dist.regenerate_parameters(0.2)
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
355 img = dist.transform_image(orig_img)
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
356 t2 = time.time()
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
357
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
358 print "next 40, total = ", t2-t1, ", avg=", (t2-t1)/40
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
359
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
360 # time the next 50
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
361 t1 = time.time()
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
362 for i in range(50):
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
363 dist.regenerate_parameters(0.2)
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
364 img = dist.transform_image(orig_img)
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
365 t2 = time.time()
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
366
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
367 print "next 50, total = ", t2-t1, ", avg=", (t2-t1)/50
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
368
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
369 # time the next 1000
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
370 t1 = time.time()
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
371 for i in range(1000):
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
372 dist.regenerate_parameters(0.2)
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
373 img = dist.transform_image(orig_img)
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
374 t2 = time.time()
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
375
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
376 print "next 1000, total = ", t2-t1, ", avg=", (t2-t1)/1000
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
377
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
378
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
379
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
380 def _save_image(img, path):
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
381 img2 = Image.fromarray((img * 255).astype('uint8'), "L")
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
382 img2.save(path)
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
383
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
384 # TODO: reformat to follow new class... it function of complexity now
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
385 '''
5
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
386 def _distorter_tests():
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
387 #import pylab
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
388 #pylab.imshow(img)
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
389 #pylab.show()
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
390
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
391 for letter in ("d", "a", "n", "o"):
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
392 img = _load_image("tests/" + letter + ".png")
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
393 for alpha in (1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0):
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
394 for sigma in (1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0):
24
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
395 id = LocalElasticDistorter((32,32))
5
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
396 img2 = id.distort_image(img)
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
397 img2 = Image.fromarray((img2 * 255).astype('uint8'), "L")
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
398 img2.save("tests/"+letter+"_alpha"+str(alpha)+"_sigma"+str(sigma)+".png")
24
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
399 '''
5
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
400
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
401 def _benchmark():
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
402 img = _load_image("tests/d.png")
24
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
403 dist = LocalElasticDistorter((32,32))
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
404 dist.regenerate_parameters(0.0)
5
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
405 import time
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
406 t1 = time.time()
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
407 for i in range(10000):
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
408 if i % 1000 == 0:
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
409 print "-"
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
410 dist.distort_image(img)
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
411 t2 = time.time()
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
412 print "t2-t1", t2-t1
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
413 print "avg", 10000/(t2-t1)
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
414
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
415 if __name__ == '__main__':
24
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
416 import time
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
417 import pylab
5
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
418 import Image
24
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
419 import os.path
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
420 #_distorter_tests()
5
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
421 #_benchmark()
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
422 #_specific_test()
24
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
423 #_complexity_tests()
010e826b41e8 Modifications to elastic distortions: fixed an important bug with distortions themselves (now result is much nicer visually), made interface to conform to Transformation standard, and added ability to save a certain amount of distortion fields to reuse them if complexity doesn't change
fsavard <francois.savard@polymtl.ca>
parents: 5
diff changeset
424 _complexity_benchmark()
5
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
425
8d1c37190122 Ajouté code de déformations élastiques locales, adapté depuis un travail que j'ai fait la session dernière
fsavard <francois.savard@polymtl.ca>
parents:
diff changeset
426