12 Replies Latest reply: Mar 12, 2012 3:38 AM by savispud RSS

    adjusting image saturation

    savispud Community Member

      Dear All,

      discovered the pleasures of Edit>Convert to Profile command. When I convert to a new profile (I have belatedly  discovered paper profiles) from adobe RGB to Hahnelmule Photorag to be precise there is a loss of saturation I am having trouble recovering. I will avoid this problem by starting with the correct profile however I have a lot of work in the wrong profile. To keep things simple I have flattened the image. Suggestions?

        • 1. Re: adjusting image saturation
          gator soup Community Member


          >> Edit>Convert to Profile command. When I convert to a new profile...there is a loss of saturation I am having trouble recovering


          that is a sure sign your Source Space has "out of gamut" color in your print space that will need to be addressed in every file, sorry, i don't know many tips for this

           

          as you mentioned important, before converting (Edit> Convert to Profile) always flatten any adjustment layers

           

          try this: gballard.net/psd/cmstheory.html

          starting with: SOFT PROOFING in Photoshop (1/3 down the page)

          OUT-OF-GAMUT COLORS and

          Rendering Intent: Perceptual v Relative Colorimetric

           

          Bruce Fraser was the King of this area:

          http://www.creativepro.com/articles/author/127446

          his theories are still very much relevant today

          • 2. Re: adjusting image saturation
            Noel Carboni Community Member

            You're no doubt going to get some questions on why you're converting images from a device independent profile to a paper-specific profile.  Perhaps that would be a good place to start.

             

            -Noel

            • 3. Re: adjusting image saturation
              savispud Community Member

              My target output is archival inkjets with which I have has some problems. The mains place that I used seemed unaware of paper profiles hence very variable output. Now I have the problem of a number of files I need to use Edit>Convert to Profile. the Vibrance filter can help but there is also a loss of very fine detail and a compression of tonal range.

              • 4. Re: adjusting image saturation
                Noel Carboni Community Member

                Not sure what a "mains place" is - print house?  It's amazing that in this day and age that a print shop wouldn't know about color profiles.

                 

                It's hard to envision a loss of detail because of a profile conversion, though...  Can you put up before/after screenshots?  I'm wondering if something is wrong with the profile on hearing that.  VERY curious.

                 

                -Noel

                • 5. Re: adjusting image saturation
                  savispud Community Member

                  It was a printmaking workshop where the main emphasis is on traditional printmaking techniques. The paper profile was from another bureau. If you can recommend where I could source the paper profile for Hahnemule photorag I would appreciate it. The file I am looking at is a little untidy. I would build it a little better now. And now amount of fiddling with adjustment layers is enabling me recreate the saturation and tonal range of the adobe RGB space I created it in.

                  • 6. Re: adjusting image saturation
                    Lundberg02 Community Member

                    This going to be another thread where the OP is starting from nowhere. You DO NOT convert your source space to a paper profile. Get the printer profiles from Hahnemule for your printer.

                    • 7. Re: adjusting image saturation
                      savispud Community Member

                      Could you exapnd "You DO NOT convert your source space to a paper profile." I was recomended to use Convert to Profile by the print bureau.

                      • 8. Re: adjusting image saturation
                        savispud Community Member

                        attached is a sample file. The LH is the original, the RH is the converted.sample jpg.jpg

                        • 9. Re: adjusting image saturation
                          gator soup Community Member


                          >> I was recomended to use Convert to Profile by the print bureau.


                          i think the undercurrent here is the source>print Conversion should be applied in the printer setup — not in Photoshop — although, as long as the conversion is done as a final last step in packaging the file for the printer (and that's what the printer requested), i don't see a problem as long as you keep the editable working copy preserved in its wider-gamut form

                           

                          • PS: it could be the printer wants you to do the Conversion so you can see the gamut problems with your file, and he doesn't have to explain why your out-of-gamut colors shifted and blocked up because YOU did the conversion and he only printed YOUR file

                           

                          in other words, as you probably know, don't convert your master file to the small print profile, hammer away on it, and Save over it...much better to work on a copy of the master file in Adjustment Layers, and do the conversion as a last step before saving a copy of that for the printer

                           

                          if i was developing a workflow to deal with these issues, i would read everything Bruce Fraser wrote about Photoshop Gamut, Gamut Warning, Soft Proofing, 16-bit capturing and editing in Adjustment Layers (until i fully understood what he was talking about)

                           

                          next i would go to View> Proof Setup> Custom and set Device to Simulate to the printer profile (so i could exploit Photoshop's Gamut Warning & Soft Proofing tools)

                           

                          then when the prints come back, train my eye to interpret the differences and work better from the start based on what is being observed in the problem (and good) areas

                           

                          of course, this is assuming that all three of your profiles are excellent for 'accurate' proofing on the monitor: source, monitor, and print spaces

                          • 10. Re: adjusting image saturation
                            Lundberg02 Community Member

                            Start using a different printer. Why should you do their work.

                            • 11. Re: adjusting image saturation
                              savispud Community Member

                              I would like to persevere with this shop as it is 50-60% cheaper than places that do know what they are doing. So I would like to have some idea of what is going on. If I embedded the profile + the printer is set so that photoshop manages colour will this control the output.

                              Secondly how seriously should you take out of gamut warnings?

                              Thanks

                              • 12. Re: adjusting image saturation
                                savispud Community Member

                                One thought when experimenting one simple solution to saturation/tonal problems is to change to semi mat