Creating wider gamut G'MIC Color Presets?

[Teto (Teto The Squirrel fox)]

@mikae1

I was thinking that this wouldn’t work as the gamut is sRGB and the conversion won’t automagically expand the gamut beyond the source space? I’m not sure though, this is more of a question. If I want to try this, should I assign the sRGB profile to the .png and then convert to Adobe RGB? Sorry, that may be Photoshop lingo. Not sure how I’d do it with free tools. Guess there’s a way in ImageMagick or G’MIC?

Some answers here, I’ll try to not be pedantic.
A photo/picture can an embedded color profile (the most cases) and none. If you work with a jpeg/raw from your camera there will be an embedded color profile (sRGB, Adobe1998, and so on), but sometimes photos don’t have (and it’s bad).

• If you attribute (assign) a color profile to a photo, you say to the photo : whatever is you profile (and maybe you have not), I say that it is sRGB (for example). so this pixel R=123, G=148 and B=251 will now correspond to this pixel in the color profile I assign to you. So when you do that the colors in your photo change instantly, as the pixel R=123, G=148 and B=251 is not the same color in sRGB or in Adobe1998.
• However, if you convert a photo from a profile to another, every pixel color will be converted to be the “same” in the new color profile. 2 photos in different color profiles, but the 2nd is converted from the 1st, will look like the same. So the pixel R=123, G=148 and B=251 in sRGB will become R=101, G=122 and B=255 in Adobe1998 (whatever). The big difference is here : a color inside the 1st profile can be outside the profile in the 2nd. That means that every pixel outside the profile will be clipped. To avoid this you’ll have to change it, by lower the light for example.

G’mic/ImageMagick may do that, I don’t know, as I attribute and convert profiles with Gimp, which is able to do that correctly in the last versions. And sorry if you already knew that.