Opencv实现抠图背景图替换功能
本文实例为大家分享了Opencv实现抠图替换背景图的具体代码,供大家参考,具体内容如下
下面简单图片演示一下:
提取mask:
===>
替换背景:
+ =
python的opencv代码如下:
# coding=utf-8 import cv2 import numpy as np img=cv2.imread('lp.jpg') img_back=cv2.imread('back.jpg') #日常缩放 rows,cols,channels = img_back.shape img_back=cv2.resize(img_back,None,fx=0.7,fy=0.7) cv2.imshow('img_back',img_back) rows,cols,channels = img.shape img=cv2.resize(img,None,fx=0.4,fy=0.4) cv2.imshow('img',img) rows,cols,channels = img.shape#rows,cols最后一定要是前景图片的,后面遍历图片需要用到 #转换hsv hsv=cv2.cvtColor(img,cv2.COLOR_BGR2HSV) #获取mask 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 center=[50,50]#在新背景图片中的位置 for i in range(rows): for j in range(cols): if dilate[i,j]==0:#0代表黑色的点 img_back[center[0]+i,center[1]+j]=img[i,j]#此处替换颜色,为BGR通道 cv2.imshow('res',img_back) cv2.waitKey(0) cv2.destroyAllWindows()
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