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Input/Output/Workflow Scanning, printing, color management, and discussing best practices for control and repeatability

Color problems

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Old 05-17-2010, 11:56 PM
Pictus's Avatar
Pictus Pictus is offline
Join Date: Apr 2008
Location: Brazil
Posts: 93
Re: Color problems

Entendo, é uma questão chata...
Aqui abaixo um apanhado de links que julgo interessantes, bom para ler quando estiver com a cuca fresca

Practical guidelines and references for digital photographers
Color Management, Camera Profiles, & Working Spaces

SRGB x Adobe RGB

ProPhoto or ConPhoto ?

Also look at this
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Old 05-18-2010, 04:52 PM
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TommyO TommyO is offline
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Join Date: Aug 2007
Location: NC, USA
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Re: Color problems

Det vore trevligt om alla skulle tala engelska.

It simply helps everyone else enjoy the forum. Not everyone speaks Portuguese (or Swedish, or all the other languages from our readers).
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Old 05-19-2010, 03:10 AM
angelstudio angelstudio is offline
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Re: Color problems

Sorry TommyO, you are right.....and yes everyone can speak english....
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Old 05-17-2011, 02:58 PM
cliffbennett cliffbennett is offline
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Join Date: May 2011
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Re: Color problems


There is really no reason to work in one color space when your eventual target is another color space. Doing so will simply cause you to go through the proof-modify process too many times in the end.... just more time spent doing unnecessary tasks. There is nothing wrong with working in the sRGB color space when your work requires it. Many professionals do so. AdobeRGB is simply more common among photographers and their work environment.


Sorry, TommyO but I must respecfully disagree, both on editing in the intended target space and in which space to use.

If you are working only for the web, you could work in sRGB. You can make a case for doing so because you know exactly what you're getting.

But the sRGB profile is still a monitor profile, albeit an artificial one, intended to standardize for "average" monitors.

As such, it is neither gray balanced or perceptually uniform -- which means for instance you can't make adjustments by grabbing a point on the adjustment curve to lighten midtones without shifting color.

The gamut is also smaller than most printing profiles and tends to clip reds.

There are reasons many professional photographers and graphic designers use Adobe RGB (1998) or ProPhoto.

As Charles E. Gardner points out in a pretty good article here ( ) Adobe RGB (1998) has a good gamut for printing, and doesn't waste gamut space on colors that won't reproduce on a printing press.

Some who intend to print on higher gamut printers will want to edit in ProPhoto RGB. I guess some other tutorials on this site recommend that, especially if you're using Camera Raw.

There are other editing profiles that have balanced gray and perceptual uniformity, but Adobe RGB (1998) and ProPhotoRGB come installed with the Adobe suites and let you be pretty standardized.

The whole point is you want to keep one editing or working file in a good space and then convert copies as necessary -- i.e., to sRGB for web use, to U.S. Web Coated (SWOP) v2 or some other CMYK profile for printing.

So you let the computer and software fix the color for each use and still have your original for future editing if necessary.


never save working files as JPEG, because it is a "lossy" compression. Every time you save, it re-compresses and loses more image information. Saving once or twice at "highest" or number 12 compression is usually not noticeable for web use, but many saves can degrade the image.

And you never want to save JPEG for print use.

For a working file, one should keep a TIFF file with LZW compression -- it will be almost as small and will not lose clarity or build up image artifacts. If you aren't concerned with disk space, then keeping a Photoshop native file is even better.
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Old 05-18-2011, 08:20 AM
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andrewrodney andrewrodney is offline
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Location: Santa Fe
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Re: Color problems

Using sRGB in no way guarantees a match, even a close match between the OP’s calibrated display while viewing that data and what he or others will see on a non ICC aware browser. Its the best lowest common dominator color space for posting images to the web but that’s about it. Those viewing the sRGB images in non ICC aware browsers, using wide gamut displays will also see pretty awful previews. The sRGB spec (its a theoretical color space) is based on a CRT display circa 1993. So even if you use sRGB in non color managed applications, all bets are off in terms of any kind of match. It might be close, might not, your mileage may vary.

In terms of RGB working spaces in Adobe products, see:
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Old 05-18-2011, 04:57 PM
mushmush mushmush is offline
Join Date: Dec 2009
Location: San Diego, CA USA
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Thumbs up Re: Color problems

Thank you for all who answered- this was a nice refresher. I'd say the OP found some good answers from a spectrum of knowledgeable and sharing people.
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