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How do I change from 24 bit depth to 8 bit depth image?

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I have image data for my input 256x256x3 uint8 and the bit depth is 24. My question is, how can I change from 24 bit depth image to 8 bit depth image without changing the colortype in 'truecolor'? Here's my ans value. And here's my codes to read image and info image:-
>> I=imread('1234.png');
>> imfinfo('1234.png')

Accepted Answer

Walter Roberson
Walter Roberson on 27 Jun 2023
imread() im2uint8() imwrite()

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