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tools/tricks to compensate for col deficiencies

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  #1  
Old 02-01-2013, 02:21 PM
frankg frankg is offline
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tools/tricks to compensate for col deficiencies

I have problems seeing some shades of red & green. This causes huge problems for me when doing portraits and judging if there's too much red in the skin tone. Same would be true of green scenes.

Apparently 1 in 11 males have some kind of 'col blindness', soI am not alone.
I was wondering if anyone has explored a means to tell if and where there is too much red, saturation, or? A sort of 'out of gamma' map idea.

On another thread where this issue came up it was suggested:
"The idea of showing the colour content of an image tonally rather than chromatically. Whether you would work with a combination of Channels, the B&W Adjustment and/or other more exotic things like Calculations, I don't have the time to explore - but I reckon there is potential in that broad approach.... The thing is to be able to identify precisely which colours are problematic."
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Old 02-01-2013, 04:19 PM
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Cupcake Cupcake is offline
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Re: tools/tricks to compensate for col deficiencie

http://blogs.adobe.com/jkost/tag/printing-soft-proofing

http://www.colblindor.com/2009/01/04...lor-blindness/

http://forums.adobe.com/message/4114325

http://www.colorhelper.com/index.php

http://bjango.com/articles/actions/

Last edited by Cupcake; 02-01-2013 at 09:23 PM.
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Old 02-02-2013, 05:53 AM
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Mike Needham Mike Needham is offline
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Re: tools/tricks to compensate for col deficiencie

Try looking up articles and tutorials on colour correcting by the numbers, it would seem to give a more solid foundation, try This one for starters and a quick search of Google brings up a ton of results too.
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Old 02-02-2013, 03:47 PM
frankg frankg is offline
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Re: tools/tricks to compensate for col deficiencie

Almost all the links listed above will show a 'normal vision' person what a col blind person sees or rather does not see. What I need is the opposite. make sense ?

I did however browse the web and came to this app / program which I haven't yet wrapped my head around, but it may be close to what I'm asking for.

I think it places a window over the image on the screen and you can select from a range of colours which will then be shown, with black marks e.g. redness in skin

I could then select those areas and try to adjust the saturation etc

Any thoughts or knowledge of this or similar programs ?
http://www.ryobi-sol.co.jp/visolve/en/visolve.html
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Old 02-03-2013, 12:57 PM
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jbedford jbedford is offline
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Re: tools/tricks to compensate for col deficiencie

Though I'm quite certain that the other replies are more helpful to what you're experiencing, I can't help but ask whether it may be limitations with your monitor / video card, or if this is experienced over a variety of different media?
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Old 02-03-2013, 01:13 PM
frankg frankg is offline
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Re: tools/tricks to compensate for col deficiencie

Same problem with other media too and in 'the real world' - nature, etc.
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Old 02-03-2013, 08:15 PM
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Re: tools/tricks to compensate for col deficiencie

This may not be the solution for you but it's what comes to mind for me.
The numbers never lie. I would recommend you gather a set of images- properly exposed, well processed, corrected, and fine tuned images (portraits, landscapes, whatever are important to you). If you have Photoshop, set one of the Eyedropper targets in the Info palette to LAB color and study the numbers in your reference images. LAB separates lightness from color. The L channel shows you the brighness from 0-100 while the a and b channels hold all the color. There are fixed ratios and ranges for skin color. Looking at the values you can tell if the skin is too red or too pale or imbalanced toward one too yellow or too red/magenta. Looking at the numbers you can tell very easily what color an area is. There are skin charts and other color tables and printer calibration photos you can collect free of the internet and these will give you a large amount of color reference points.
The L values also correlate to real world situations. A well exposed forehead will be in a certain range of brightness on the 0-100 scale. Over 90 and you can assume it will be too bright and under 70 and it will like be a bit on the dark side.
After you become familiar with the numbers and work with them you will learn to trust them because they never lie. Even experts who have fully normal color vision don't always trust their tired eyes or drifting displays when they finalize a photo for output. The numbers are a very reliable spot check.
Cheers, Murray
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Old 02-03-2013, 08:26 PM
frankg frankg is offline
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Re: tools/tricks to compensate for col deficiencie

Thanks for this Murray. I will get onto it tomorrow I do have PS.
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