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 fit Value

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 about

[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 is

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: supposedly,