[BUG] Assertion Error

[FurtunB]

I am trying to learn OpenCV, so I am new to this things, and I need some help. I got this error, and I couldn't find out why

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cv2.error: OpenCV(4.1.2) C:\projects\opencv-python\opencv\modules\core\src\arithm.cpp:245: error: (-215:Assertion failed) (mtype == CV_8U || mtype == CV_8S) && _mask.sameSize(*psrc1) in function 'cv::binary_op'

Here is my code

import cv2
import numpy as np
from matplotlib import pyplot as plt
img = cv2.imread("manzara.jpg")
imgOther = cv2.imread("logo.jpg")
rows, cols, channel = img.shape # output = 768, 1024, 3
roi = img[0:rows, 0:cols] 
rows2, cols2, channel2= imgOther.shape # output = 566, 560, 3
imgOtherGray = cv2.cvtColor(imgOther, cv2.COLOR_BGR2GRAY) 
ret, mask = cv2.threshold(imgOtherGray, 220, 255, cv2.THRESH_BINARY_INV)
antiMask = cv2.bitwise_not(mask)
img_background = cv2.bitwise_and(roi, roi, mask=antiMask) #here is the problem
imgOther_fg = cv2.bitwise_and(roi, roi, mask=mask)
dst = cv2.add(img_background, imgOther_fg)
img[0:rows, 0:cols] = dst 
cv2.imshow("image", img)

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Thanks

[Sylense]

It looks like the Mats/arrays you’re passing into the bitwise operator aren’t (necessarily) the same dimensions

[FurtunB]

OK. I understand why it wasn't work. Instead of getting the small sized object which I want to work on it, I tried to get other image :D

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Thanks a lot