opencv - How do I successfully convert a 32b image to 8b? -

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i have input image of type cv_32uc3 rgb mat convert cv_8uc3. have tried using convertto method follows:

img.convertto(dst, cv_8uc3, 0.00390625)

however, resulting image black.

my question is, how convert 32b 3 channel image 8b?

i believe scale backwards. if want scale floating point image (0-1 values) 8 bit need use 255 scale factor.


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