实心轮廓

import cv2
import numpy as np
o=cv2.imread('C:/Users/xpp/Desktop/coins.png')#原始图像
cv2.imshow("original",o)
gray=cv2.cvtColor(o,cv2.COLOR_BGR2GRAY)#将彩色图片转换为灰度图片
ret,binary=cv2.threshold(gray,127,255,cv2.THRESH_BINARY)#将灰度图片转换为二值图片
contours,hierarchy=cv2.findContours(binary,cv2.RETR_LIST,cv2.CHAIN_APPROX_SIMPLE)#计算图像轮廓
n=len(contours)
contoursImg=[]
for i in range(n):
    temp=np.zeros(o.shape,np.uint8)
    contoursImg.append(temp)
cnt=contours[i]
mask=np.zeros(gray.shape,np.uint8)
cv2.drawContours(mask,[cnt],0,255,-1)#绘制图像空心轮廓
pixelpoints=cv2.findNonZero(mask)#计算位置信息
print("pixelpoints.shape=",pixelpoints.shape)
print("pixelpoints=\n",pixelpoints1)
cv2.imshow("mask",mask)
cv2.waitKey()
cv2.destroyAllWindows()