1 # -*- coding: utf-8 -*- 2  3 from PIL import Image 4 from pylab import * 5  6 def compare_pic_L(pic1,pic2): 7     #打开第一张图片 8     im1 = Image.open(pic1).convert('L') 9     print im1.format ,im1.size, im1.mode10     11     #像素值转数组12     aim1 = np.transpose(array(im1))13     #im1.show()14 15     im2=Image.open(pic2).convert('L')16     aim2=np.transpose(array(im2))17     im2.show()18 19     dif= np.zeros((300,307))20 21     for x in range(dif.shape[0]):22         for y in range(dif.shape[1]):23             if aim1[x,y] == aim2[x,y] :24                 dif[x,y]=25525             else:26                 dif[x,y]=027                 #print dif[x,y]28     #print dif29     print 'dif:',dif.shape30 31     x=im1.size[0]32     y=im1.size[1]33     34     c = Image.new("L",(x,y),(255))35     #c.show()36     #用 像素灰度值画图37     for u in range(0,x):38         for i in range(0,y):39             #print type(dif[i,u])40             ss=int(dif[u,i])41             c.putpixel((u,i),ss)42     c.show()43 44 def compare_colorful_pic(pic1,pic2):45     #打开第一张 把像素点信息保存到数组46     im3_1 = Image.open(pic1)47     array_im1=np.transpose(array(im3_1))48     print array_im1.shape49 50     #打开第二张51     im33_ = Image.open(pic2)52     array_im2=np.transpose(array(im33_))53     print array_im2.shape54 55     #作差56     dif_=array_im2 - array_im157     #print dif_58     print type(dif_)59 60     #用像素点三基色画图61     pic_D = Image.new("RGB",(array_im1.shape[1],array_im1.shape[2]),(255))62     for x in range(array_im1.shape[1]):63         for y in range(array_im1.shape[2]):64             65             pic_D.putpixel((x,y),(255-dif_[0,x,y],255-dif_[1,x,y],255-dif_[2,x,y]))66             #注意 两个参数都为元组;;第一个参数：像素数量 宽*高，第二个参数为 三基色 （三通道）67 68     pic_D.show()69     pic_D.save('d.jpg')70 71 if __name__ == "__main__":72     compare_pic_L('2.jpg','2__.jpg')73     compare_colorful_pic('2.jpg','2__.jpg')