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If I would like to convert hdr images to sdr, what values would be changed in the image data. So far i think ive understood that the bit depth has to be changed so for example from 12 bit to 8 bit you would divide by 16 (4096/256=16) and round up or down to quantasize the value. But is that it? Does luminance or chrominance or any other property of the image have to be changed? I think i found one source that said gamma stays the same at 2.4 while another source said that the gamma curve changes to better fit the extreme values. When i google this problem all i find are these functions used to tonemap the images but i cant find anything about how to use them.

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  • Depends strongly on your source images, and to which standard they were created. – Jason Conrad Dec 5 '20 at 10:46

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