图像不规则填充

import cv2
import numpy as np
img=cv2.imread('C:/Users/xpp/Desktop/Lena.png')#原始图像
cv2.imshow('original',img)
gray=cv2.cvtColor(img,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(img.shape,np.uint8)
    contoursImg.append(temp)
cnt=contours[i]
mask=np.zeros(gray.shape,np.uint8)
result1=cv2.fillPoly(mask,cnt,(203,192,255))#图像边界填充
result2=cv2.fillPoly(img,[cnt],(203,192,255))#图像内部填充
cv2.imshow('result1',result1)
cv2.imshow('result2',result2)
cv2.waitKey(0)
cv2.destroyAllWindows()