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Should you normalize RGB values by 255 or 256?
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this post was submitted on 02 Aug 2026
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The offset is needed because this quantization dividing by 256 uses truncation whereas by 255 uses rounding.
So a value of 245 (for example) could be anything between 245.00000 and 245.99999. Therefore, when dequantizing, we set the value to 245.5, which is in the middle. Between 245.00000 and 245.99999.