: Keep black lines, make other colours transparent Here is a sample image : The white background is actually transparent. I'd like to keep only the black lines and surfaces, and make all other

@Marchetta832

Basically, the light colors are easier to get rid of with simple contrast adjustment, the dark blues are probably gonna be harder work.

But since this is a comic, it was probably inked first and then colored later. So maybe just ask the publisher of André Franquin for an uncolored version?

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