Python实现给照片换底色（附代码）

pip install numpy-1.13.1+mkl-cp36-cp36m-win_amd64.whlpip install opencv_python-3.3.1-cp36-cp36m-win_amd64.whl

import cv2import  numpy as npimg=cv2.imread('timg.jpg')#缩放rows,cols,channels = img.shapeimg=cv2.resize(img,None,fx=0.5,fy=0.5)rows,cols,channels = img.shapecv2.imshow('img',img)#转换hsvhsv=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)#腐蚀膨胀erode=cv2.erode(mask,None,iterations=1)cv2.imshow('erode',erode)dilate=cv2.dilate(erode,None,iterations=1)cv2.imshow('dilate',dilate)#遍历替换for i in range(rows):    for j in range(cols):        if dilate[i,j]==255:            img[i,j]=(0,0,255)#此处替换颜色，为BGR通道cv2.imshow('res',img)cv2.waitKey(0)cv2.destroyAllWindows()