Re:Gamma error in picture scaling (2007)
by berkut on Thursday August 21, 2014 @03:57PM
(#8209241)
No, this is a gamma correction issue.
Software which work in full-float linear (Nuke, for example) don't have this issue, as the RGB values are already in luminance-adjusted values as they're linear.
The issue only affects software filtering images in lower-precision (and thus gamma-baked) pixel intensity values - i.e. 0-255 for uchar (8-bit) and 0- for ushort (16-bit), where the R,G and B channels are given equal weighting).
Software which work in full-float linear (Nuke, for example) don't have this issue, as the RGB values are already in luminance-adjusted values as they're linear.
The issue only affects software filtering images in lower-precision (and thus gamma-baked) pixel intensity values - i.e. 0-255 for uchar (8-bit) and 0- for ushort (16-bit), where the R,G and B channels are given equal weighting).