Color/Luminosity separation

Started 1 month ago | Discussions thread
Pictus
Pictus Veteran Member • Posts: 6,514
Re: Color/Luminosity separation

Tom Axford wrote:

That can work fine provided you keep the colour and luminosity separate.

However, you have to eventually convert back to RGB to view your image. The problem is that by working on colour and luminosity separately you can easily go outside the RGB gamut (which is much less than colour + luminosity) and so the colours get distorted when you convert back to RGB.

Use a very large Color Space like ProPhoto RGB and there will be no problem.
With smaller Color Space we may have problems like loss of brightness in the girl dress https://www.modelmayhem.com/forums/post/894058/2#post18305828

GIMP has the grain extract trick and I have to check with Affinity Photo

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