Understanding color balancing
Understanding color balancing
- Subject: Understanding color balancing
- From: "Lars Vinberg" <email@hidden>
- Date: Mon, 19 Dec 2005 14:25:03 -0800
- Organization: 8x10.se
A short intro about myself since I am new to posting on this list: I am a
landscape photographer, work with film up to 8x10 as well as digital. I am
also a software engineer.
I am trying to figure out how to make a color balancing tool for correcting
color balance in photographs. Ideally the user should be able to use a
dropper tool to click in neutral hightlights, midtones, and shadows,
possibly even more points. The tool should then make a correction of color
balance for the luminance where clicked. Possibly a UI similar to Photoshop
or Aperture.
My question is: What is the proper way to do this, mathematically? The
working color space is an RGB space. My guts tell me that adjustments should
be made in chrominance only, keeping luminance fixed. Adjusting RGB curves
directly is of course a no-no. I could do corrections in Lab space but
calculations get a bit expensive. Is there a better way?
I admit that this question is a bit vague, but to more precisely formulate
my question I think I need more information or understanding of how to
mathematically do chrominance corrections.
Any insights appreciated,
-Lars
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden