In the second part of this series had left the developed photos in Camera RAW using ProPhoto RGB space to ensure that there is one and only one conversion color space . Let us now see how we proceed when we open the image in Photoshop .

Once the RAW is revealed (it should make all possible settings and color levels on the RAW and not Photoshop ) can generate 16-bit TIF file or open it in Photoshop. The choice is left to individual taste, I, on my way to work, and not gender directly open any files until you finish editing the image.

We will do all the editing necessary and will keep a TIF editing layers (always work in layers so that the work is reversible), in 16 bits and ProPhotoRGB space. Thus, if you later want to change something, we still have the maximum amount of information. 16-bit and wider color space. Unless you need to modify some of the revealed, we work only with the TIF quietly.

Then we can draw two JPG files, one for sending to print in AdobeRGB and one for the web in sRGB . In both cases start from the original TIF for a single conversion. In Photoshop we go to Edit -> Convert to Profile ... (EYE!, If we mistake for Assign Profile ... we will have a disastrous color and we'll go crazy trying to figure out why you would not be the first). In the window that appears choose the destination space we want and how conversion to a choice of four:

1. Perceptual. Maintains the visual relationship between colors, but their values ​​may change. If there are many colors out of range is the right choice.
2. Saturation. Create vivid colors regardless of accuracy. For photography forget it, simply use graphics where exact color does not matter.
3. Relative Colorimetric. Colors that are out of range the closest possible approaches, and the rest is to maintain the visual relationship. Usually the best option.
4. Absolute colorimetric. Colors within the range not changed, and those outside of the range closest approximates, so that clipping occurs at the ends piling all colors outside the range in a single value.

Typically, use the relative colorimetric, and only in extreme colorful images appeal to perceptual. In the program's help for more on the four methods.

After converting the color space converted to 8-bit image and save the JPG. Thus we have worked all the time that has been possible with as much information as possible, ie 16-bit ProPhoto RGB space. We also maintain a copy in TIF file with all this information and we use it to generate the JPG only as a last step needed to upload to the web or send to print.

Some laboratories also accept TIF files, but it would be suicidal in ProPhoto RGB mandárselos not sure before going to handle well. If working in AdobeRGB or sRGB (as will happen in 99% of cases) the quality difference between sending a 16-bit TIF or JPG of 8 with the least compression, is negligible, and JPG are much more manageable.

Other articles in this series:

1. ¿AdobeRGB or sRGB? (I)
2. ¿AdobeRGB or sRGB? (II)
3. ¿AdobeRGB or sRGB? (YIII) (This article)

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8 Responses to "Adobe RGB or sRGB? (YIII) "

1. Antonio says:

   05/04/2009 - 17:50

   Perfect

   Answer
2. SAURUS says:

   04/04/2010 - 14:32

   Simple and powerful, really educational.

   Answer
3. wash says:

   04/03/2011 - 14:12

   Thank you very much for the help, guidance and all, very important to clarify the issues so we can all learn, thanks again and for me has been very helpful.

   Answer
4. EOS5DMKII says:

   22/04/2011 - 11:09

   Thank you very much for sharing your knowledge, facilitating learning who we are at that stage of digital photography.

   Allow me a question: Would not it be better for cameras like the Canon EOS 5D MkII ProPhotoRGB not working fix it in the color space of Adobe RGB and relizar s entire workflow with ACR and CS5 also in this space, not having to any conversion when sending to print in RGB Asobe and in any case, make a single convert to sRGB if it goes to the net?

   Thanks again for your help.

   Answer
   • OscarG says:

     24/04/2011 - 14:07

     Settings which settings on the camera, goes to work internally in its own color space, and then convert it to that you set, so do not save any conversion.

     Answer
5. wash says:

   21/06/2011 - 21:53

   Thank you very much for the contribution was of great help, greetings.

   Answer
6. vincent says:

   05/10/2011 - 21:18

   simply wonderful, and now I want to know how to see the index of all published articles, it seemed just perfect the explanation. thanks

   Answer
   • OscarG says:

     06/10/2011 - 20:10

     Thanks Vincent.
     The rest of the articles if you have them sRGB or AdobeRGB linked at the end of this article.

     And on the right columas are the links to the Archive to view all articles by publication date, and categories, to see them by topic.

     Answer