Given two input first one is a number which is uint8, second one is image which is 8 bit gray scale image, the image has pixsels which are also uint8 for example
first input is 4 if we convert it binary we get 00000100
also each pixsel is converted to binary format in the image
00000100 & image(binary format) which produce output image that is the binary format
in the end output is converted to uint8.
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