Re: [Gimp-developer] OT: noise equivalence in HSV components

2004-07-25 Thread William Skaggs
Joseph Heled writes: > I might be wrong, but this will not solve it either. I assume the > AB (color information) might be in the "same" units, but I don't > think Luminosity is. (and I can make the argument that Hue and > Saturation are in the "same" units as well, the problem being how > to f

Re: [Gimp-developer] OT: noise equivalence in HSV components

2004-07-23 Thread Joseph Heled
> HSV is the wrong colorspace to use for this purpose. The LA*B* > colorspace was designed to do what you are trying to accomplish: > supposedly, equal distances in LA*B* coordinate space correspond to > equal distances in human perceptual space -- although I understand > that there is debate abou

Re: [Gimp-developer] OT: noise equivalence in HSV components

2004-07-22 Thread William Skaggs
Joseph Heled writes: > How (or can you) combine errors/noise in HSV into one error/noise > figure which reflects the total "human visual" error perception. HSV is the wrong colorspace to use for this purpose. The LA*B* colorspace was designed to do what you are trying to accomplish: supposedl

[Gimp-developer] OT: noise equivalence in HSV components

2004-07-22 Thread Joseph Heled
This is not a gimp question, but perhaps there is someone here who can shed light on this issue, How (or can you) combine errors/noise in HSV into one error/noise figure which reflects the total "human visual" error perception. I am sure this is not a good formulation of the question. Here i