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Timpanogos
Butterfly
Joined: Oct 04, 2008
Posts: 14
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 Posted: Sun Oct 05, 2008 10:17 pm Post subject: Channels in Photoshop |
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I love creating art with Photoshop and I try to improve what I know of photoshop. My question is what are channels and what do you use them for? Also how do you use them in Photoshop?
Thanks!
Timpanogos |
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chever
'Mud'
Joined: Aug 22, 2008
Age: 20
Posts: 1668
Location: Earth
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| Posted: Sun Oct 05, 2008 10:20 pm Post subject: |
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Start here
http://www.sketchpad.net/channels1.htm
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Taly
Pileated woodpecker
Joined: Sep 23, 2008
Posts: 181
Location: Rain Forest
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| Posted: Mon Oct 06, 2008 12:55 am Post subject: |
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| I love creating photoshop art too. I hope someday to be able to program my own graphic sofwares. cheers. There's should be a topic for our college manipulations. I love to work with colours. |
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zeichner
Snowy Owl
Joined: Sep 11, 2008
Age: 50
Posts: 145
Location: Minneapolis, MN
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| Posted: Mon Oct 06, 2008 9:10 am Post subject: |
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Here's another one - http://www.mprove.de/script/90/KPT/KPT1.html - very old school (from version 2.0) - but channels really haven't changed. This is from Kai Krause, one of the earliest Photoshop gurus.
Another quick tip for channels is to change the mode to LAB & then use the Lightness channel to only change brightness/contrast (all the color information is in the a & b channels - so changing lightness settings doesn't mess with color balance.) Just remember to switch the mode back to RGB or CMYK if you want to save to jpg (LAB is really only for file manipulation, not distrubution.)
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computerlove
emos and goths, please die.
Joined: Jul 11, 2006
Posts: 3542
Location: Male, Mexico, Graphic Design
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| Posted: Thu Oct 09, 2008 12:05 pm Post subject: |
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wow, that's very outdated, one can easily duplicate all he did with effects for example, which has the double benefit that it can later be adjusted.
Timpanogos: channels are good for:
1.- selecting something that is difficult, for example say you want to select the white in the next image:
if you check the channels in photoshop, you'll see that one of them gives the best contrast.
2.- it's good for retouching images
let's say you have a face with some red parts, like the skin of someone, and you want to "beautify" him for a magazine, like this:
you change to CMYK, select the MAGENTA channel, and use the sponge tool a little
voilá, the nose now isn't so red
3.- I forgot number three 
hope it helps 
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