图像颜色填充

import cv2
img=cv2.imread('C:/Users/xpp/Desktop/Lena.png')#原始图像
cv2.imshow('original',img)
img_copy=img
img_gray=cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)#将彩色图片转换为灰度图片
img_blur=cv2.medianBlur(img_gray,5)#中值滤波
img_edge=cv2.adaptiveThreshold(img_blur,255,cv2.ADAPTIVE_THRESH_GAUSSIAN_C,cv2.THRESH_BINARY,blockSize=9,C=3)#自适应阈值处理
img_edge=cv2.cvtColor(img_edge,cv2.COLOR_GRAY2BGR)#将灰度图片转换为彩色图片
for _ in range(2):
    img_copy=cv2.pyrDown(img_copy)#图像进行下采样
for _ in range(5):
    img_copy=cv2.bilateralFilter(img_copy,d=9,sigmaColor=9,sigmaSpace=7)#双边滤波
    img_copy=cv2.resize(img_copy,(img.shape[1],img.shape[0]),interpolation=cv2.INTER_CUBIC)#图像缩放
cv2.imshow("result",img_copy)
cv2.waitKey(0)
cv2.destroyAllWindows()