Purple Fringe

Moderator: jsachs

Post Reply
Robert Schleif
Posts: 355
Joined: May 1st, 2009, 8:28 pm

Purple Fringe

Post by Robert Schleif »

Is there any possibility that the neutral gray that replaces the purple fringe could be adjusted to any color?
jsachs
Posts: 4455
Joined: January 22nd, 2009, 11:03 pm

Re: Purple Fringe

Post by jsachs »

Why do you want to substitute a different color? Maybe selective color correction would do what you want?
Jonathan Sachs
Digital Light & Color
Robert Schleif
Posts: 355
Joined: May 1st, 2009, 8:28 pm

Re: Purple Fringe

Post by Robert Schleif »

I've been trying to remove purple fringes around leaves amidst branches whose color is close to the gray that is put in by purple fringe. I can't easily use color selective or color remap to provide green edges to the leaves without also turning the branches green.
jsachs
Posts: 4455
Joined: January 22nd, 2009, 11:03 pm

Re: Purple Fringe

Post by jsachs »

My suggestion is to use Selective Color Correction to change the purple to green.

I did some experiments with setting a replacement color, but it did not work very well for trees and foliage. It worked fine for the leaves but gave the branches a green edge.

I think a smarter algorithm that determines the average of the darkest colors in the neighborhood of pixels being replaced would work better.
Jonathan Sachs
Digital Light & Color
Robert Schleif
Posts: 355
Joined: May 1st, 2009, 8:28 pm

Re: Purple Fringe

Post by Robert Schleif »

OK. Thank you for trying. If you return to this problem, it would be nice if the solution could also address the following problem. In shooting night time scenes, red lights often get blown, and their centers are white or orange. Something analogous to purple fringe removal might allow automatic repair of the problem.
Post Reply