opencv + python 叠加logo照片,非透明

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背景照片:

logo:

合成效果:

代码:

import cv2 as cv, numpy as np
# Load two images
img1 = cv.imread('227351.jpg') # 背景
img2 = cv.imread('logo.png') # logo

# I want to put logo on top-left corner, So I create a ROI
rows,cols,channels = img2.shape
roi = img1[0:rows, 0:cols ]

# Now create a mask of logo and create its inverse mask also
img2gray = cv.cvtColor(img2,cv.COLOR_BGR2GRAY)
ret, mask = cv.threshold(img2gray, 254, 255, cv.THRESH_BINARY) # 这个254很重要
mask_inv = cv.bitwise_not(mask)

cv.imshow('mask',mask_inv)
# Now black-out the area of logo in ROI
img1_bg = cv.bitwise_and(roi,roi,mask = mask) # 这里是mask,我参考的博文写反了,我改正了,费了不小劲

# Take only region of logo from logo image.
img2_fg = cv.bitwise_and(img2,img2,mask = mask_inv) # 这里才是mask_inv

# Put logo in ROI and modify the main image
dst = cv.add(img1_bg,img2_fg)
img1[0:rows, 0:cols ] = dst

cv.imshow('res',img1)
cv.waitKey(0)
cv.destroyAllWindows()

参考博文

https://blog.csdn.net/m0_37606112/article/details/79602537