Mercurial > ift6266

annotate transformations/add_background_image.py @ 62:bab98bb47616

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Correction majeure. Auparavant, le lissage gaussien etait global avec une seule gaussienne. Maintenant, le lissage gaussien est local. Un bruit correle est rajoute sur l'image
author SylvainPL <sylvain.pannetier.lebeuf@umontreal.ca>
date Tue, 09 Feb 2010 11:41:17 -0500
parents 4d4248f7e2fb
children ab70fbca513c
rev   line source
8
bdaa5bd26dcf Added : script to merge a character image with a random background image
guitch
parents:
diff changeset
1 #!/usr/bin/python
bdaa5bd26dcf Added : script to merge a character image with a random background image
guitch
parents:
diff changeset
2 # -*- coding: iso-8859-1 -*-
bdaa5bd26dcf Added : script to merge a character image with a random background image
guitch
parents:
diff changeset
3
32
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
4 '''
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
5 Implementation of random background adding to a specific image
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
6
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
7 Author: Guillaume Sicard
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
8 '''
8
bdaa5bd26dcf Added : script to merge a character image with a random background image
guitch
parents:
diff changeset
9
bdaa5bd26dcf Added : script to merge a character image with a random background image
guitch
parents:
diff changeset
10 import sys, os, random, fnmatch
32
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
11 import Image, numpy
8
bdaa5bd26dcf Added : script to merge a character image with a random background image
guitch
parents:
diff changeset
12
32
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
13 class AddBackground():
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
14 def __init__(self, threshold = 128):
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
15 self.h = 32
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
16 self.w = 32
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
17 self.threshold = threshold;
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
18 self.bg_image_dir = './images/'
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
19 self.pattern = '*.jpg'
8
bdaa5bd26dcf Added : script to merge a character image with a random background image
guitch
parents:
diff changeset
20
32
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
21 # get threshold value
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
22 def get_settings_names(self):
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
23 return [str(self.threshold)]
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
24
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
25 # no need, except for testmod.py
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
26 def regenerate_parameters(self, complexity):
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
27 value = random.gauss(0, 0.5*complexity)
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
28 return [value]
8
bdaa5bd26dcf Added : script to merge a character image with a random background image
guitch
parents:
diff changeset
29
32
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
30 # load an image
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
31 def load_image(self,filename):
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
32 image = Image.open(filename).convert('L')
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
33 image = numpy.asarray(image)
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
34 image = (image / 255.0).astype(numpy.float32)
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
35 return image
8
bdaa5bd26dcf Added : script to merge a character image with a random background image
guitch
parents:
diff changeset
36
32
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
37 # save an image
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
38 def save_image(self,array, filename):
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
39 image = (array * 255.0).astype('int')
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
40 image = Image.fromarray(image)
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
41 if (filename != ''):
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
42 image.save(filename)
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
43 else:
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
44 image.show()
8
bdaa5bd26dcf Added : script to merge a character image with a random background image
guitch
parents:
diff changeset
45
32
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
46 # make a random 32x32 crop of an image
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
47 def rand_crop(self,image):
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
48 i_w, i_h = image.shape
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
49 x, y = random.randint(0, i_w - self.w), random.randint(0, i_h - self.h)
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
50 return image[x:x + self.w, y:y + self.h]
8
bdaa5bd26dcf Added : script to merge a character image with a random background image
guitch
parents:
diff changeset
51
32
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
52 # select a random background image from "bg_image_dir" and crops it
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
53 def rand_bg_image(self):
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
54 files = os.listdir(self.bg_image_dir)
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
55 image_files = fnmatch.filter(files, self.pattern)
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
56 i = random.randint(0, len(image_files) - 1)
8
bdaa5bd26dcf Added : script to merge a character image with a random background image
guitch
parents:
diff changeset
57
32
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
58 image = self.load_image(self.bg_image_dir + image_files[i])
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
59 self.bg_image = self.rand_crop(image)
8
bdaa5bd26dcf Added : script to merge a character image with a random background image
guitch
parents:
diff changeset
60
32
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
61 # set "bg_image" as background to "image", based on a pixels threshold
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
62 def set_bg(self,image):
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
63 b = (image < self.threshold / 255.0).astype(numpy.float32)
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
64 return b * self.bg_image + ( 1 - b) * image
8
bdaa5bd26dcf Added : script to merge a character image with a random background image
guitch
parents:
diff changeset
65
32
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
66 # transform an image file and return an array
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
67 def transform_image_from_file(self, filename):
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
68 self.rand_bg_image()
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
69 image = self.load_image(filename)
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
70 image = self.set_bg(image)
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
71 return image
8
bdaa5bd26dcf Added : script to merge a character image with a random background image
guitch
parents:
diff changeset
72
32
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
73 # standard array to array transform
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
74 def transform_image(self, image):
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
75 self.rand_bg_image()
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
76 image = self.set_bg(image)
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
77 return image
8
bdaa5bd26dcf Added : script to merge a character image with a random background image
guitch
parents:
diff changeset
78
32
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
79 # test method
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
80 def test(self,filename):
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
81 import time
8
bdaa5bd26dcf Added : script to merge a character image with a random background image
guitch
parents:
diff changeset
82
32
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
83 sys.stdout.write('Starting addBackground test : loading image')
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
84 sys.stdout.flush()
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
85
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
86 image = self.load_image(filename)
8
bdaa5bd26dcf Added : script to merge a character image with a random background image
guitch
parents:
diff changeset
87
32
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
88 t = 0
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
89 n = 500
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
90 for i in range(n):
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
91 t0 = time.time()
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
92 image2 = self.transform_image(image)
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
93 t = ( i * t + (time.time() - t0) ) / (i + 1)
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
94 sys.stdout.write('.')
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
95 sys.stdout.flush()
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
96
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
97 print "Done!\nAverage time : " + str(1000 * t) + " ms"
8
bdaa5bd26dcf Added : script to merge a character image with a random background image
guitch
parents:
diff changeset
98
32
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
99 if __name__ == '__main__':
8
bdaa5bd26dcf Added : script to merge a character image with a random background image
guitch
parents:
diff changeset
100
32
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
101 myAddBackground = AddBackground()
4d4248f7e2fb Modified background adding class for compliance with testmod.py
Guillaume Sicard <guitch21@gmail.com>
parents: 9
diff changeset
102 myAddBackground.test('./images/0-LiberationSans-Italic.ttf.jpg')