形状匹配

import cv2
o1=cv2.imread('C:/Users/xpp/Desktop/coins_1.png')#原始图像
o2=cv2.imread('C:/Users/xpp/Desktop/coins_2.png')#原始图像
o3=cv2.imread('C:/Users/xpp/Desktop/coins_3.png')#原始图像
gray1=cv2.cvtColor(o1,cv2.COLOR_BGR2GRAY)#将彩色图片转换为灰度图片
gray2=cv2.cvtColor(o2,cv2.COLOR_BGR2GRAY)#将彩色图片转换为灰度图片
gray3=cv2.cvtColor(o3,cv2.COLOR_BGR2GRAY)#将彩色图片转换为灰度图片
ret,binary1=cv2.threshold(gray1,127,255,cv2.THRESH_BINARY)#将灰度图片转换为二值图片
ret,binary2=cv2.threshold(gray2,127,255,cv2.THRESH_BINARY)#将灰度图片转换为二值图片
ret,binary3=cv2.threshold(gray3,127,255,cv2.THRESH_BINARY)#将灰度图片转换为二值图片
contours1,hierarchy=cv2.findContours(binary1,cv2.RETR_LIST,cv2.CHAIN_APPROX_SIMPLE)#计算图像轮廓
contours2,hierarchy=cv2.findContours(binary2,cv2.RETR_LIST,cv2.CHAIN_APPROX_SIMPLE)#计算图像轮廓
contours3,hierarchy=cv2.findContours(binary3,cv2.RETR_LIST,cv2.CHAIN_APPROX_SIMPLE)#计算图像轮廓
cnt1=contours1[0]
cnt2=contours2[0]
cnt3=contours3[0]
ret0=cv2.matchShapes(cnt1,cnt1,1,0.0)
ret1=cv2.matchShapes(cnt1,cnt2,1,0.0)
ret2=cv2.matchShapes(cnt1,cnt3,1,0.0)
print("相同图像的matchShape=",ret0)
print("相似图像的matchShape=",ret1)
print("不相似图像的matchShape=",ret2)
cv2.imshow("original1",o1)
cv2.imshow("original2",o2)
cv2.imshow("original3",o3)
cv2.waitKey()
cv2.destroyAllWindows()