大家来找茬图片比较脚本

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第一份代码是比较两幅图，找出差异来。

# -*- coding: cp936 -*-  import ctypes  import Image, ImageGrab, ImageChops#构造RECT结构体  class RECT(ctypes.Structure):      _fields_ = [('left', ctypes.c_long),                  ('top', ctypes.c_long),                  ('right', ctypes.c_long),                  ('bottom', ctypes.c_long)]      def __str__(self):          return str((self.left, self.top, self.right, self.bottom))    HWND = ctypes.windll.user32.FindWindowA(None, "大家来找茬")  if HWND == 0:      print "找不到窗口"      quit()  rect =RECT()  ctypes.windll.user32.GetWindowRect(HWND,ctypes.byref(rect))print rect#去掉人物栏,去掉底边，去掉边框rect0 = (rect.left+2,rect.top+190+2,rect.right-2,rect.bottom-96-2)print rect0width = (rect0[2] - rect0[0])/2height = rect0[3] - rect0[1]rect1 = (0,0,width-15,height)rect2 = (width-1,0,rect0[2] - rect0[0]-16,height)im = ImageGrab.grab(rect0)im1 = im.crop(rect1)im2 = im.crop(rect2)imdiff = ImageChops.difference(im1,im2).save("c:/imdiff.bmp","")imdiff.show()

左图：

右图：

比较结果：

第二份代码是通过opencv的轮廓检测功能分析差异边界

代码来自：http://www.opencv.org.cn/index.php/%E8%BD%AE%E5%BB%93%28contour%29%E6%A3%80%E6%B5%8B ，略有修改

'''Created on 2011-8-18 @author: Sunny'''#import cv moduleimport cvimport sys if __name__ == '__main__':    # Declare the IplImage    pImg = None;    pContourImg = None;     storage = cv.CreateMemStorage(0);    contour = None;    mode = cv.CV_RETR_EXTERNAL;         # Create Windows    cv.NamedWindow("src", 1)    cv.NamedWindow("contour",1)     # Load Image, Convert to Gray by force    pImg = cv.LoadImage("c:/imdiff.bmp", 0) # A image in the same directory of the file.     cv.ShowImage( "src", pImg );     # Apply the Memory Storage for Contour Image.            pContourImg = cv.CreateImage(cv.GetSize(pImg),cv.IPL_DEPTH_8U,3);     # copy source image and convert it to BGR image    cv.CvtColor(pImg, pContourImg, cv.CV_GRAY2BGR);     # Find contours    contour = cv.FindContours( pImg, storage, cv.CV_RETR_EXTERNAL,        cv.CV_CHAIN_APPROX_SIMPLE);      # Draw the Contours     cv.DrawContours(pContourImg, contour, cv.CV_RGB(255,0,0), cv.CV_RGB(0, 0, 255),        2, 2, 8);     # Show Image    cv.ShowImage( "contour", pContourImg );    cv.WaitKey(0);     # Destory Windows    cv.DestroyWindow( "src" );    cv.DestroyWindow( "contour" );     # Python2.7-OpenCV2.2 will Release Image MemStorage Automatically    #cv.ReleaseImage( pImg );    #cv.ReleaseImage( pContourImg );     #cv.ReleaseMemStorage(storage);     sys.exit(0)

结果如图：

简单修改一下代码，将轮廓画在原始图片中，就可以明显的显示出差异了:

cv.DrawContours(pContourImg, contour, cv.CV_RGB(255,0,0), cv.CV_RGB(0, 0, 255), 2, 2, 8);#修改pContourImg