(save this in a file named tmp.py and run with: python tmp.py )
http://pythonimage.blogspot.com/2009/04/opencv-example.html
import Image import os import sys from opencv.cv import * from opencv.highgui import * def analyzeImage(f,name): im=Image.open(f) try: if(im.size[0]==1 or im.size[1]==1): return print (name+' : '+str(im.size[0])+','+ str(im.size[1])) le=1 if(type(im.getpixel((0,0)))==type((1,2))): le=len(im.getpixel((0,0))) gray = cvCreateImage (cvSize (im.size[0], im.size[1]), 8, 1) edge1 = cvCreateImage (cvSize (im.size[0], im.size[1]), 32, 1) edge2 = cvCreateImage (cvSize (im.size[0], im.size[1]), 8, 1) edge3 = cvCreateImage (cvSize (im.size[0], im.size[1]), 32, 3) for h in range(im.size[1]): for w in range(im.size[0]): p=im.getpixel((w,h)) if(type(p)==type(1)): gray[h][w] = im.getpixel((w,h)) else: gray[h][w] = im.getpixel((w,h))[0] cvCornerHarris(gray,edge1,5,5,0.1) cvCanny(gray,edge2,20,100) cvNamedWindow("win") cvShowImage("win", gray); cvNamedWindow("win2") cvShowImage("win2", edge1); cvNamedWindow("win3") cvShowImage("win3", edge2); cvWaitKey() f.close() except Exception,e: print e print 'ERROR: problem handling '+ name f = open(sys.argv[1],'r') analyzeImage(f,sys.argv[1])