Thanks a lot for all the input. I have been using the matrices from http://www.brucelindbloom.com/index.html?Eqn_RGB_XYZ_Matrix.html *) and thought I was doing sRGB/D65-to-Lab or sRGB/D50-to-Lab. But as I understand now, I was actually doing sRGB-to-Lab/D65 or /D50; while all the RGB spaces like AdobeRGB or sRGB have their own fixed implicit reference white. Correct? *) This is where the matrix used by babl and the Decompose plug-in is listed as "PAL/SECAM") It all almost seemed to make sense. Then I read the wiki on sRGB where it says that sRGB has an illuminant white point D65, an encoding ambient wp of D50, and a typical ambient wp of D50. Then my head exploded and I decided to keep this strictly on need-to-know... So, summing it all up, I am not doing anything wrong when I do the conversion from sRGB to Lab/D65? - to be like Photoshop: D50 - to be "more right": D65 As to babl and the Decompose plug-in: They should be updated to use sRGB conversion? Rupert _______________________________________________ Gimp-developer mailing list Gimp-developer@xxxxxxxxxxxxxxxxxxxxxx https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
