python——使用opencv修改证件照的背景颜色

将蓝底照片变成白底照片

效果图：

代码：

import cv2import numpy as npimg = cv2.imread(r"C:\Users\huan4\Desktop\kanghuan\kanghuan.jpg")hsv = cv2.cvtColor(img, cv2.COLOR_BGR2HSV)lower_blue=np.array([90,70,70])upper_blue=np.array([110,255,255])mask = cv2.inRange(hsv, lower_blue, upper_blue)cv2.imshow('Mask', mask)rows,cols,channels = img.shapefor i in range(rows):for j in range(cols):if mask[i,j]==255:img[i,j]=(255,255,255)#此处替换颜色，为BGR通道cv2.imshow('res',img)cv2.imwrite(r"C:\Users\huan4\Desktop\kanghuan\kanghuan_new.jpg", img)cv2.waitKey(0)cv2.destroyAllWindow