今天抠图，Python实现一键换底片！想换什么换什么（附源码）

import numpy as np
import cv2

pip install OpenCV-python

img = cv2.imread('timg.jpg')

rows,cols,channels = img.shape
print(rows,cols,channels)
img = cv2.resize(img,None,fx=0.5,fy=0.5)
rows,cols,channels = img.shape
print(rows,cols,channels)

cv2.imshow('img',img)

hsv = cv2.cvtColor(img,cv2.COLOR_BGR2HSV)

cv2.imshow('hsv',hsv)
lower_blue = np.array([90,70,90])
upper_blue = np.array([110,255,255])

mask = cv2.inRange(hsv,lower_blue,upper_blue)
cv2.imshow('Mask',mask)

erosion = cv2.erode(mask,None,iterations=1)
cv2.imshow('erosion',erosion)

dilation = cv2.dilate(mask ,None,iterations=1)
cv2.imshow('dilation',dilation)

for i in range(rows):
    for j in range(cols):
        if dilation[i,j] == 255:
            img[i,j] = (0,0,255)   # rgb(255,0,0)  BGR()
            
cv2.imshow('res',img)

cv2.imwrite('ting.png',img)
cv2.waitKey(0)  # 0 无限等待
cv2.destroyAllWindows()  # 销毁所有的窗口