本文實例為大家分享了python3實現證件照背景替換的具體代碼，供大家參考，具體內容如下

import cv2import numpy as npimg=cv2.imread('zjz.jpg')#縮放rows,cols,channels = img.shapeimg=cv2.resize(img,None,fx=0.5,fy=0.5)rows,cols,channels = img.shapecv2.imshow('img',img)#轉換hsvhsv=cv2.cvtColor(img,cv2.COLOR_BGR2HSV)lower_blue=np.array([78,43,46])upper_blue=np.array([110,255,255])mask = cv2.inRange(hsv, lower_blue, upper_blue)cv2.imshow('Mask', mask)#腐蝕膨脹erode=cv2.erode(mask,None,iterations=1)cv2.imshow('erode',erode)dilate=cv2.dilate(erode,None,iterations=1)cv2.imshow('dilate',dilate)#遍歷替換for i in range(rows):  for j in range(cols):    if dilate[i,j]==255:      img[i,j]=(0,0,255)#此處替換顏色，為BGR通道cv2.imshow('res',img)cv2.waitKey(0)cv2.destroyAllWindows()

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