Re: [Gimp-user] color management -- basic question

[Casey Connor <gimp-user-list caseyconnor org>]

> I recommend using Rec2020 or ACEScg as your "go to" wide gamut color 
> space (but not when using default GIMP, for reasons already mentioned) 
> - ACEScg is used by people making images for cinema, Rec2020 is the 
> up-and-coming standard for monitors, and both of these spaces are good 
> all-around editing color spaces.

Thanks, I'll check those out. Unfortunately my raw development program 
(Canon DPP) only exports to a few options.

> Profiling your monitor is a good thing to do. If your monitor is 
> relatively new and has a good sRGB preset, then what you see right now 
> is probably a pretty good guide to what your images actually look 
> like. But not all monitors come with good sRGB presets.

Yeah, it's old and cheap (Dell 1707Fp). :-) I had planned to use 
Argyll/displaycal, and make a matrix profile per your suggestions. I 
think I read on your site that a LUT version would also be handy also 
for using occasional perceptual rendering intent to get a feel for all 
the detail in an image?

> So currently trying to soft proof to the built-in GIMP sRGB profile is 
> a waste of time as LCMS soft proofing will report that all the colors 
> are in gamut.

Hmmm... so if I have a wide-gamut image and set soft-proofing profile to 
sRGB-elle-V4-srgbtrc.icc, soft proofing works -- that's because your 
version of gimp's sRGB is amended in the necessary ways to make it so?

> I think you might mean "layer blend modes"? - "overlay" is the name of 
> a particular blend mode, but it's not one of the LCH blend modes.

Yes, thanks.

> Well, what you can do is duplicate the layer, use GIMP's 
> "Colors/Levels" or "Colors/Curves" or "Colors/Exposure" and set the 
> layer blend mode to "Lightness", which will leave the Hue and Chroma 
> of the original layer unaltered.

Nice! I had previously used the Lch blend modes for color repair stuff; 
hadn't played with the lightness mode.

Thanks once again,
-c