How to rotate colors correctly

by

I need to “rotate” colors depending on a certain dependency, how do I calculate this?

I’m using no program, just working with a bitmap in C#

For example:

Every pixel, which is R:193,G:0,B:0 has to become R:0,G60,B:90

Now every other color needs to be switched in relation.

193/0/0 has a neighbor pixel with 205/48/48, what I’m searching is the relative neighbor pixel of 0/60/90

Is there a way to calculate this, without getting values above 255 and beneath 0?

Answer

This is a complete stab in the dark, but here is what I would try: The HSL values are 200/100/35 and 0/100/76, so rotate the value of each H value by 200° and add 41% to each L value (clipped at 100).

More information from thebodzio‘s comment:

I think what you really have in mind is “mapping”. In that regard it’s
like any other mapping between two vector spaces (with some
clipping/wrapping; not necessarily bijective process). The problem is,
there’s infinitely many such mappings. You just have to formulate one
that suits you best. @JohnB’s proposition seems to be the most
reasonable in that regard, however it requires conversion from RGB
(sRGB?) to HSL and back. Algorithms are easy enough to find.

Attribution
Source : Link , Question Author : Raymond Osterbrink , Answer Author :
2 revs

Leave a Comment