11-21-2023, 02:05 PM
(This post was last modified: 11-21-2023, 02:08 PM by TheGrayMan.)
Hey,
there's a nice website: https://www.wide-gamut.com/test that helps you check whether display supports wider gamut by showing you a simple image saved with P3 .icc color profile. You should see a "W" on the lighter red background if you have HDR turned on and uniform red on SDR displays.
I saved the image on my PC (also attached in post) and opened it with GIMP. When GIMP asks to convert the image to GIMP built-in SRGB I refuse and just keep the P3 .icc profile. Then what's weird for me is that it seems the image is composed of 2 colors outside of 0-255 range. Another weird thing is that at the top of the GIMP's window it's said that the image is 8-bit. These 2 things already seem self-exclusive... Screenshot attached.
Does anybody know what's going on with those values? Correct me if I'm wrong but I think assigning an .icc profile to the image does not change its values at all and the actual color values are still internally saved in 0-1 range. Icc profile is just a metdata that display can interpret to know that color values in this image should be mixed corresponding to color primaries from P3 color gamut and not SDR, right? So these weird values... - could it be GIMP's way of showing colors in wider P3 gamut but still as if corresponding to the color primaries from SDR gamut?
Will be grateful for any hints ; )
there's a nice website: https://www.wide-gamut.com/test that helps you check whether display supports wider gamut by showing you a simple image saved with P3 .icc color profile. You should see a "W" on the lighter red background if you have HDR turned on and uniform red on SDR displays.
I saved the image on my PC (also attached in post) and opened it with GIMP. When GIMP asks to convert the image to GIMP built-in SRGB I refuse and just keep the P3 .icc profile. Then what's weird for me is that it seems the image is composed of 2 colors outside of 0-255 range. Another weird thing is that at the top of the GIMP's window it's said that the image is 8-bit. These 2 things already seem self-exclusive... Screenshot attached.
Does anybody know what's going on with those values? Correct me if I'm wrong but I think assigning an .icc profile to the image does not change its values at all and the actual color values are still internally saved in 0-1 range. Icc profile is just a metdata that display can interpret to know that color values in this image should be mixed corresponding to color primaries from P3 color gamut and not SDR, right? So these weird values... - could it be GIMP's way of showing colors in wider P3 gamut but still as if corresponding to the color primaries from SDR gamut?
Will be grateful for any hints ; )