View Full Version : Yellow/red cast


christo
09-13-2006, 03:05 AM
The attached image has been critiqued by one side as having too much yellow, the other too much red. I would appreciate any and all suggestions of how to satisfy all parties. I am a newbie to color correction so please be gentle with me. Thank you

Cassidy
09-13-2006, 03:19 AM
To my eye, the first thing that hits me is that this looks almost flouro. I'd drop the saturation quite a bit. This still leaves a yellow domination over the nose and forehead, but by taking a sample of the skin lower down and then painting over those areas in colour mode, you can then adjusted the depth of recolouring with the opacity slider

Kraellin
09-13-2006, 06:13 AM
i started the same as cassidy and lowed the saturation in hue/sat but stayed in hue/sat and went to the yellow channel and moved that channel more to the red and dropped the saturation a bit on the yellows as well.

craig

TheVeed
09-13-2006, 07:01 AM
Hmm... I just played with hue/saturation, color balance, and selective color, and this is what I came up with. I agree with previous posters, it's about to get blown out and looks pretty flourescent.

mistermonday
09-13-2006, 09:23 AM
Chrissto, the image is over saturated and it appears that all of the channles have been clipped, likely by a levels adjustment gone wrong. The image does not have a lot of areas with fine detail, so the most effecient way to restore it might be a blank layer set to Color blend mode and paint over the off colored areas by sampling nearby colors similar to the quick example I have attached.
Regards, Murray

Angel_Ice
09-13-2006, 09:30 AM
Chrissto, the image is over saturated and it appears that all of the channles have been clipped, likely by a levels adjustment gone wrong. The image does not have a lot of areas with fine detail, so the most effecient way to restore it might be a blank layer set to Color blend mode and paint over the off colored areas by sampling nearby colors similar to the quick example I have attached.
Regards, Murray

Sorry can't understand with which color are you coloring in the new layer.

philbach
09-13-2006, 09:33 AM
Well I tried another route to arrive at the same sort of correction. I converted to Lab Mode and used a levels adjustment layer. I then rotated the A and B channels clockwise to desaturate them some.

Cassidy
09-13-2006, 09:35 AM
much better result phil, hair looks fair more natural, hard this one, especially since you don't know what is what from original

Angel_Ice
09-13-2006, 09:36 AM
I heard a lot talking abput Lab Mode...can u explian what is and when use it and why?

philbach
09-13-2006, 09:52 AM
Hi Angel Ice.
Lab mode is a different way of expressing color. We usually use RGB Mode for most of our work (Red, Green, &Blue) or CYMK Mode which is used for printing. Lab uses Lightnes and A & B channels. Before using Lab mode though its a good idea to have a good understanding of RGB and photoshop.

The advantage of Lab is that one can alter color without affecting luminosity or vice versa.

I am not a LAB expert. I read Dan Margulis "Photoshop Lab Color" last fall for the first time and I plan on reading it again this fall too. Its an excellent book, but for me I need to read it a few times to understand it better.

Flora
09-13-2006, 10:17 AM
Hi,

Christo,

The attached image has been critiqued by one side as having too much yellow, the other too much red. ... and, in my opinion, a bit too much magenta as well...

I used:

Selective Colors
Hue/Saturation
Blank Layer set to Color (for the green cast on the jacket and on the top of the hair)
Levels to improve contrast.

Murray,

I think you toned down the colours very well ... but, in my opinion, using a "a blank layer set to Color blend mode ... " as only colouring method on the face, or skin in general, can result in a rather flat colour...

Angel_Ice,

extracted from Photoshop Help file

The Lab Color mode has:
a lightness component (L)
the (a) component (green-red axis)
the (b) component (blue-yellow axis)
......
You can use Lab mode to:
edit the luminance and the color values in an image independently, move images between systems......

Lab color is the intermediate color model Photoshop uses when converting from one color mode to another.Great job everybody!!!

Flora
09-13-2006, 10:20 AM
Sorry Phil ... I hadn't seen you had answered about the LAB mode already... :o:

LonK
09-13-2006, 01:44 PM
I suppose I did pretty much what Flora did, the biggest difference being that I use PhotoImpact.

Daviskw
09-13-2006, 07:28 PM
Hi all... good job as usual... I have nothing new to offer. Selective color and hue/saturation here as well.

I had saved it to the drive so posting anyway...lol

Butch

dkcoats
09-13-2006, 09:35 PM
Flora, you never cease to amaze me.

dc

Angel_Ice
09-14-2006, 01:48 AM
Hi Angel Ice.
Lab mode is a different way of expressing color. We usually use RGB Mode for most of our work (Red, Green, &Blue) or CYMK Mode which is used for printing. Lab uses Lightnes and A & B channels. Before using Lab mode though its a good idea to have a good understanding of RGB and photoshop.

The advantage of Lab is that one can alter color without affecting luminosity or vice versa.

I am not a LAB expert. I read Dan Margulis "Photoshop Lab Color" last fall for the first time and I plan on reading it again this fall too. Its an excellent book, but for me I need to read it a few times to understand it better.


Thanks so much for this explanation, it's more understable for me that the one found in the Adobe Help file; thanks Flora for coping and pasting the Adobe Help but i have red it before and it was not clear for me.

Do you have some exemple of this technique or i'm going OT here? ;)

philbach
09-14-2006, 05:25 AM
Well using the above photo; open it in photoshop and then convert from RGB to LAB mode. In lab open up a curves adjustment layer. When the curves dialog box comes up I started with the A channel (Magenta and Green). I then rotated the diagonal line clockwise to desaturate the Magenta and greens. After doing this go to the b channel to desaturate the Blue and Yellow.

Again there are other ways of dealing with oversaturation. Using Lab is an excellent way to deal with color problems. I wish I knew more about using it.