opencv，照片加水印

#TODO.3.2.合成图片
import cv2
import numpy as np
original_image=cv2.imread('4.jpg')
logal_image=cv2.imread('3.jpg')
w1,h1,c1=original_image.shape
w2,h2,c2=logal_image.shape
print(w1,h1)
print(w2, h2)
# roi=original_image[(w1-w2)//2:(w1+w2)//2,(h1-h2)//2:(h1+h2)//2]
roi=original_image[w1-w2:w1,h1-h2:h1]
#灰度化
gray_logol=cv2.cvtColor(logal_image,cv2.COLOR_BGR2GRAY)
#黑化
_,black_logol=cv2.threshold(gray_logol,170,255,cv2.THRESH_BINARY)
imag_tsw=cv2.bitwise_and(roi,roi,mask=black_logol)
#白化
_,white_logal=cv2.threshold(gray_logol,170,255,cv2.THRESH_BINARY_INV)
imag_tsw1=cv2.bitwise_and(logal_image,logal_image,mask=white_logal)
imag_tsw2=cv2.add(roi,imag_tsw)
roii=cv2.add(imag_tsw,imag_tsw1)
print(roii.shape)
print(roi.shape)
roi[:]=roii
# cv2.imshow('roigg',roi)
# cv2.imshow('img_tsw',imag_tsw)
# cv2.imshow('white',imag_tsw1)
cv2.imshow('roi',original_image)
if cv2.waitKey(0)&0xFF==ord('q'):
    cv2.destroyAllWindows()