
Save your image as a 24-bit bitmap and then save it again as a monochrome bitmap.
Use Windows Explorer or My Computer to determine the file size for each file type.
Monochrome bitmap: 10.3 KB (10,622 bytes)
24-bit bitmap: 232 KB (237,654 bytes)
Why do you think there is a difference in the file size?
because monochrome is only using one colour in different shades while the 24bit picture. 24bit contains about more than 16 million colours in the picture while monochrome only has 2, black and white.
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