RGB Channels

[Doug Nelson]

By BamaCutie on Thursday, July 12, 2001 - 08:46 am:

I've been reading alot of online forums about digital retouching and have found alot of folks who retouch in regards to RGB channels. I have a photo with some type of mold damage and checked out the RGB channels and found that the blue channel showed the damage more than the other two. How do I handle this? Do I work directly on the blue channel? I'm totally curious... Could someone out there shed some light? Thanks. ~Maya~

By Doug Nelson (doug) on Friday, July 13, 2001 - 07:44 am:


Is it a color or B/W photo? If B/W, pick the channel that looks the best and use it, discarding the other two. In color you can try working on a single channel, just make sure you don't rearrange anything in relation to the other two channels, or you'll have color spots.

By BamaCutie on Friday, July 13, 2001 - 09:31 am:


Thanks, Doug, for your reply. The photo is color and I will play around with working in individual channels. So much to learn!

By Flem Snopes on Monday, July 16, 2001 - 04:24 pm:


I've heard the blue channel is often the culprit in scanned color images.

Flem