Mercurial > ift6266

annotate transformations/slant.py @ 72:af2f9252dd14

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
forgot to import sys in testmod
author Arnaud Bergeron <abergeron@gmail.com>
date Wed, 10 Feb 2010 11:34:32 -0500
parents 0f1337994716
children
rev   line source
34
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
1 #!/usr/bin/python
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
2 # coding: utf-8
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
3
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
4 '''
35
e05715e4554d first commit, the module has been tested with testmod.py, it has no timing
youssouf
parents: 34
diff changeset
5 Author: Youssouf
e05715e4554d first commit, the module has been tested with testmod.py, it has no timing
youssouf
parents: 34
diff changeset
6
34
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
7 this module add a slant effect to the image.
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
8
40
0f1337994716 modified the test function in slant.py in order to generate multiple transformation sample
youssouf
parents: 35
diff changeset
9 To obtain the slant effect, each row of the array is shifted proportionately by a step controlled by the complexity.
34
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
10
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
11 '''
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
12
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
13 import numpy
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
14
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
15
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
16 class Slant():
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
17 def __init__(self, complexity=1):
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
18 #---------- private attributes
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
19 self.direction = 1
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
20 self.angle = 0
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
21
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
22 #---------- generation parameters
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
23 self.regenerate_parameters(complexity)
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
24 #------------------------------------------------
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
25
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
26 def _get_current_parameters(self):
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
27 return [self.angle, self.direction]
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
28
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
29 def get_settings_names(self):
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
30 return ['angle', 'direction']
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
31
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
32 def regenerate_parameters(self, complexity):
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
33 self.angle = numpy.random.uniform(0.0, complexity)
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
34 P = numpy.random.uniform()
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
35 self.direction = 1;
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
36 if P < 0.5:
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
37 self.direction = -1;
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
38 return self._get_current_parameters()
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
39
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
40
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
41 def transform_image(self,image):
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
42 if self.angle == 0:
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
43 return image
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
44
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
45 ysize, xsize = image.shape
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
46 slant = self.direction*self.angle
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
47
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
48 output = image.copy()
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
49
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
50 # shift all the rows
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
51 for i in range(ysize):
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
52 line = image[i]
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
53 delta = round((i*slant)) % xsize
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
54 line1 = line[:xsize-delta]
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
55 line2 = line[xsize-delta:xsize]
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
56
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
57 output[i][delta:xsize] = line1
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
58 output[i][0:delta] = line2
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
59
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
60
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
61 #correction to center the image
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
62 correction = (self.direction)*round(self.angle*ysize/2)
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
63 correction = (xsize - correction) % xsize
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
64
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
65 # center the region
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
66 line1 = output[0:ysize,0:xsize-correction].copy()
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
67 line2 = output[0:ysize,xsize-correction:xsize].copy()
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
68 output[0:ysize,correction:xsize] = line1
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
69 output[0:ysize,0:correction] = line2
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
70
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
71
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
72 return output
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
73
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
74
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
75 # Test function
40
0f1337994716 modified the test function in slant.py in order to generate multiple transformation sample
youssouf
parents: 35
diff changeset
76 # Load an image in local and create several samples of the effect on the
0f1337994716 modified the test function in slant.py in order to generate multiple transformation sample
youssouf
parents: 35
diff changeset
77 # original image with different parameter. All the samples are saved in a single image, the 1st image being the original.
0f1337994716 modified the test function in slant.py in order to generate multiple transformation sample
youssouf
parents: 35
diff changeset
78
34
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
79 def test_slant():
40
0f1337994716 modified the test function in slant.py in order to generate multiple transformation sample
youssouf
parents: 35
diff changeset
80 import scipy
0f1337994716 modified the test function in slant.py in order to generate multiple transformation sample
youssouf
parents: 35
diff changeset
81 img_name = "test_img/mnist_0.png"
0f1337994716 modified the test function in slant.py in order to generate multiple transformation sample
youssouf
parents: 35
diff changeset
82 dest_img_name = "test_img/slanted.png"
0f1337994716 modified the test function in slant.py in order to generate multiple transformation sample
youssouf
parents: 35
diff changeset
83 nb_samples = 10
0f1337994716 modified the test function in slant.py in order to generate multiple transformation sample
youssouf
parents: 35
diff changeset
84 im = Image.open(img_name)
34
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
85 im = im.convert("L")
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
86 image = numpy.asarray(im)
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
87
40
0f1337994716 modified the test function in slant.py in order to generate multiple transformation sample
youssouf
parents: 35
diff changeset
88 image_final = image
0f1337994716 modified the test function in slant.py in order to generate multiple transformation sample
youssouf
parents: 35
diff changeset
89 slant = Slant()
0f1337994716 modified the test function in slant.py in order to generate multiple transformation sample
youssouf
parents: 35
diff changeset
90 for i in range(nb_samples):
0f1337994716 modified the test function in slant.py in order to generate multiple transformation sample
youssouf
parents: 35
diff changeset
91 slant.regenerate_parameters(1)
0f1337994716 modified the test function in slant.py in order to generate multiple transformation sample
youssouf
parents: 35
diff changeset
92 image_slant = slant.transform_image(image)
0f1337994716 modified the test function in slant.py in order to generate multiple transformation sample
youssouf
parents: 35
diff changeset
93 image_final = scipy.hstack((image_final,image_slant))
34
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
94
40
0f1337994716 modified the test function in slant.py in order to generate multiple transformation sample
youssouf
parents: 35
diff changeset
95 im = Image.fromarray(image_final.astype('uint8'), "L")
34
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
96 im.save(dest_img_name)
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
97
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
98 # Test
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
99 if __name__ == '__main__':
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
100 import sys, os, fnmatch
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
101 import Image
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
102
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
103 test_slant()
e61a46996db6 first commit, the module has been tested with testmod.py, it has no timing
ychherawala@smets-w04
parents:
diff changeset
104