证件照换底(红→蓝)

# #!/usr/bin/env python
# # -*- coding: utf-8 -*-
import cv2
import numpy as np
# 读取照片
img=cv2.imread(r'C:\My Files\Desktop\1728c6d91b9f7d33a9903eb455c578c.jpg')

# 图像缩放
img = cv2.resize(img,None,fx=1,fy=1)
rows,cols,channels = img.shape
print(rows,cols,channels)
cv2.imshow('img',img)

# 图片转换为灰度图
hsv = cv2.cvtColor(img,cv2.COLOR_BGR2HSV_FULL)
cv2.imshow('hsv',hsv)
# hsv = img
# cv2.imwrite('c.jpg', hsv)
# exit()

# 图片的二值化处理
lower_blue=np.array([180,180,180])
upper_blue=np.array([255,255,255])
mask = cv2.inRange(hsv, lower_blue, upper_blue)
# print(dir(cv2))

#腐蚀膨胀
erode=cv2.erode(mask,None,iterations=0)
cv2.imshow('erode',erode)

dilate=cv2.dilate(erode,None,iterations=0)
cv2.imshow('dilate',dilate)



#遍历替换
for i in range(rows):
  for j in range(cols):
    if erode[i,j]==255: 
      img[i,j]=(219,142,67)
cv2.imshow('res',img)

# 保持显示
cv2.waitKey(0)