 | 1 | initial version |
How do you isolate a change in color?
Say you have a grey colored dot with a value of Red 100, Green 100, Blue 100
Then you put a blue overlay with values of R 4, G 10, B 251 with 50% opacity on that dot and end up with values of Red 72, Green 74, Blue 124
So the change is Red -28, Green -26, Blue +24
Do you only take the positive values?
0, 0, 24 is a far cry from R 4, G 10, B 251
| | 2 | No.2 Revision |
So I've been attempting some image manipulation and I've come across a problem which seems simple but I can't seem to wrap my head about.
How do you isolate a change in color?
Say you have a grey colored dot with a value of Red 100, Green 100, Blue 100
Then you put a blue overlay with values of R 4, G 10, B 251 with 50% opacity on that dot and end up with values of Red 72, Green 74, Blue 124
So the change is roughly Red -28, Green -26, Blue +24
Do you The best Idea I have is to only take the positive values?
values but even that seems wrong as R 0, G 0, B 24 is a far cry from R 4, G 10, B 251251.
Is there a stupid easy function I'm missing or am I just over thinking it?
