Revision: 6327 Author: multichill Date: 2009-02-05 22:22:41 +0000 (Thu, 05 Feb 2009)

Log Message: ----------- Program to match images based on histograms.

This is just a first version so that other people can play around with it. Expect the code to change a lot!

Added Paths: ----------- trunk/pywikipedia/match_images.py

Added: trunk/pywikipedia/match_images.py =================================================================== --- trunk/pywikipedia/match_images.py (rev 0) +++ trunk/pywikipedia/match_images.py 2009-02-05 22:22:41 UTC (rev 6327) @@ -0,0 +1,184 @@ +#!/usr/bin/python +# -*- coding: utf-8 -*- +''' +Program to match two images based on histograms. + +Usage: +match_images.py ImageA ImageB + +This is just a first version so that other people can play around with it. +Expect the code to change a lot! + +''' +# +# (C) Multichill, 2009 +# +# Distributed under the terms of the MIT license. +# +__version__ = '$Id$' + +import sys, math, StringIO +import wikipedia, config +from PIL import Image + +def matchImagePages(imagePageA, imagePageB): + ''' + This functions expects two image page objects. + It will return True if the image are the same and False if the images are not the same + ''' + + imageA = getImageFromImagePage(imagePageA) + imageB = getImageFromImagePage(imagePageB) + + (imA_width, imA_height) = imageA.size + (imB_width, imB_height) = imageB.size + + imageB = imageB.resize((imA_width, imA_height)) + + imageA_topleft = imageA.crop((0,0, int(imA_width/2), int(imA_height/2))) + imageB_topleft = imageB.crop((0,0, int(imA_width/2), int(imA_height/2))) + + imageA_topright = imageA.crop((int(imA_width/2),0, imA_width, int(imA_height/2))) + imageB_topright = imageB.crop((int(imA_width/2),0, imA_width, int(imA_height/2))) + + imageA_bottomleft = imageA.crop((0, int(imA_height/2), int(imA_width/2), imA_height)) + imageB_bottomleft = imageB.crop((0, int(imA_height/2), int(imA_width/2), imA_height)) + + imageA_bottomright = imageA.crop((int(imA_width/2),int(imA_height/2), imA_width, imA_height)) + imageB_bottomright = imageB.crop((int(imA_width/2),int(imA_height/2), imA_width, imA_height)) + + imageA_center = imageA.crop((int(imA_width * 0.25), int(imA_height * 0.25), int(imA_width * 0.75), int(imA_height * 0.75))) + imageB_center = imageB.crop((int(imA_width * 0.25), int(imA_height * 0.25), int(imA_width * 0.75), int(imA_height * 0.75))) + + wholeScore = matchImages(imageA, imageB) + topleftScore = matchImages(imageA_topleft, imageB_topleft) + toprightScore = matchImages(imageA_topright, imageB_topright) + bottomleftScore = matchImages(imageA_bottomleft, imageB_bottomleft) + bottomrightScore = matchImages(imageA_bottomright, imageB_bottomright) + centerScore = matchImages(imageA_center, imageB_center) + averageScore = (wholeScore + topleftScore + toprightScore + bottomleftScore + bottomrightScore + centerScore)/6 + + print u'Whole image ' + str(wholeScore) + print u'Top left of image ' + str(topleftScore) + print u'Top right of image ' + str(toprightScore) + print u'Bottom left of image ' + str(bottomleftScore) + print u'Bottom right of image ' + str(bottomrightScore) + print u'Center of image ' + str(centerScore) + print u' -------------' + print u'Average ' + str(averageScore) + + # Hard coded at 80%, change this later on. + if ((averageScore*100) > 80): + print u'We have a match!' + return True + else: + print u'Not the same.' + return False + +def getImageFromImagePage(imagePage): + ''' + Get the image object to work based on an imagePage object + ''' + imageURL=imagePage.fileUrl() + imageURLopener= wikipedia.MyURLopener() + imageWebFile = imageURLopener.open(imageURL) + imageBuffer = StringIO.StringIO(imageWebFile.read()) + image = Image.open(imageBuffer) + + return image + +def matchImages(imageA, imageB): + ''' + Match two image objects. Return the ratio of pixels that match + ''' + histogramA = imageA.histogram() + histogramB = imageB.histogram() + + totalMatch = 0 + totalPixels = 0 + + if not (len(histogramA)==len(histogramB)): + return 0 + + for i in range(0, len(histogramA)): + totalMatch = totalMatch + min(histogramA[i], histogramB[i]) + totalPixels = totalPixels + max(histogramA[i], histogramB[i]) + + if (totalPixels==0): + return 0; + + return float(totalMatch)/float(totalPixels)*100 + + + +def main(): + site = wikipedia.getSite(u'commons', u'commons') + + #Array of images to work on + images = [] + imageTitleA = u'' + imageTitleB = u'' + familyA = u'' + familyB = u'' + langA = u'' + langB = u'' + imagePageA = None + imagePageB = None + + for arg in wikipedia.handleArgs(): + if arg.startswith('-familyA:'): + if len(arg) == len('-familyA:'): + familyA = wikipedia.input(u'What family do you want to use?') + else: + familyA = arg[len('-familyA:'):] + elif arg.startswith('-familyB:'): + if len(arg) == len('-familyB:'): + familyB = wikipedia.input(u'What family do you want to use?') + else: + familyB = arg[len('-familyB:'):] + elif arg.startswith('-langA:'): + if len(arg) == len('-langA:'): + langA = wikipedia.input(u'What language do you want to use?') + else: + langA = arg[len('-langA:'):] + elif arg.startswith('-langB:'): + if len(arg) == len('-langB:'): + langB = wikipedia.input(u'What language do you want to use?') + else: + langB = arg[len('langB:'):] + else: + images.append(arg) + + if not (len(images)==2): + raise wikipedia.Error, 'require two images to work on.' + else: + imageTitleA=images[0] + imageTitleB=images[1] + + if not (imageTitleA == u''): + if not (langA == u''): + if not (familyA == u''): + imagePageA = wikipedia.ImagePage(wikipedia.getSite(langA, familyA), imageTitleA) + else: + imagePageA = wikipedia.ImagePage(wikipedia.getSite(langA, u'wikipedia'), imageTitleA) + else: + imagePageA = wikipedia.ImagePage(wikipedia.getSite(u'commons', u'commons'), imageTitleA) + + if not (imageTitleB == u''): + if not (langB == u''): + if not (familyB == u''): + imagePageB = wikipedia.ImagePage(wikipedia.getSite(langB, familyB), imageTitleB) + else: + imagePageB = wikipedia.ImagePage(wikipedia.getSite(langB, u'wikipedia'), imageTitleB) + else: + imagePageB = wikipedia.ImagePage(wikipedia.getSite(u'commons', u'commons'), imageTitleB) + + if (imagePageA and imagePageB): + matchImagePages(imagePageA, imagePageB) + + +if __name__ == "__main__": + try: + main() + finally: + wikipedia.stopme()

Property changes on: trunk/pywikipedia/match_images.py ___________________________________________________________________ Added: svn:keywords + Author Date Id Revision Added: svn:eol-style + native