13 Replies Latest reply: Jun 15, 2013 10:46 PM by léonie
JakeBlade45 Level 1 Level 1 (0 points)

I am exporting from a RAW file to JPG. I then decided to export to TIFF and png to see what difference there would be.

The only changes applied to the RAW were from within Aperature.

 

I was expecting no big difference when viewing the image at the reduced size to fit the screen but I am very suprised to see a very big difference.

RAW has no color space but Aperture is set to sRGB IEC61966 2-1

 

Tiff and png are about the same but the jpg looks like the contrast was changed and is much much lighter.

 

Most photo shops take jpg and transfering Tiff files is rather time consuming. Any ideas on what has gone wrong...what am I forgetting or missing here?


Mac Pro, Mac OS X (10.7.2), 8G memory
  • 1. Re: JPG color / contrast issues
    Kirby Krieger Level 6 Level 6 (11,920 points)

    I can't guess why you are seeing such a difference.  Are you using a hardware-calibrated monitor?  Without calibration, the color has no fixed point of reference, and discussions tend to be not worthwhile.

     

    I can suggest never using JPG for any image file sent for printing.  The JPG format was developed as a transmission format for display on Web pages, for which it works extremely well.  It is not designed as a transmission format for printing -- which is why TIFF files (the format was designed for transmission of files to be printed) are much bigger and therefore take longer to transmit.

  • 2. Re: JPG color / contrast issues
    JakeBlade45 Level 1 Level 1 (0 points)

    Kirby,

        Thanks for the feedback.

     

    Yes my monitor is calibrated (Spyder)  and I am actually using two monitors now and the result is the same on both ...even with one not yet calibrated.

     

    Since Tiff is the best why do most photo shops out there say they only accept JPG files.

    Who do you use that accepts TiFF? I have high speed internet so I can deal with it ...just takes longer.

     

    In the mean time still trying to figure out why the big difference when being displayed on the monitors.

  • 3. Re: JPG color / contrast issues
    Frank Caggiano Level 7 Level 7 (23,820 points)

    What was the image quality of the JPEG set to on export? As JPEG is compressed image quality will differ and the greater the compression the greater the difference.

     

    Also what was the color space of the JPEG as opposed to the Tiff on export. The color space is set in the export pane when exporting the image.

  • 4. Re: JPG color / contrast issues
    JakeBlade45 Level 1 Level 1 (0 points)

    Frank,

      I just double checked this again to be sure.

    JPEG orignal size, Include MEtadata, Image quality 12, DPI 400, Color Profile Nikon sRGB

    Black point compensation checked...I tried this before un checked and no differnece.

     

    Hmmm I see I have the color space set differently here on the export. Trying now with the Aperture color space I mentioned in the beginning. No change I still get the same ligher darks image.

  • 5. Re: JPG color / contrast issues
    JakeBlade45 Level 1 Level 1 (0 points)

    The color space setting for export is under presets.

    Checking the TIFF format I see some differences here as well.

    Quality set to 10

    Color space is correct but DPI is only 72... Changing to 400 to see what happens.

    I am using TIFF 16bit... Trying now with 8 bit to see.

    None of the above changed my TIFF image in any noticable way. Still much better than the JPG file when viewed on the display.

     

    Still stumped.

  • 6. Re: JPG color / contrast issues
    Kirby Krieger Level 6 Level 6 (11,920 points)

    JakeBlade45 wrote:

     

    Frank,

      I just double checked this again to be sure.

    JPEG orignal size, Include MEtadata, Image quality 12, DPI 400, Color Profile Nikon sRGB

    Black point compensation checked...I tried this before un checked and no differnece.

    The color space is the first thing to look at.  Can you take "Nikon sRGB" out of the equation?  Can you use regular "sRGB" for the JPG export?

  • 7. Re: JPG color / contrast issues
    JakeBlade45 Level 1 Level 1 (0 points)

    Kirby,

       Yes I did that for both JPG & TIFF and the result is the same.

    Being a new day and a new boot I deleted the files and tried again ....just for the heck of it. Same result.

    I downloaded Lightroom to try and compare but am having a hard time getting the image to look the same as the changes I made under Aperature. Once I have it closer I will see if the same thing happens when using Light room.

     

    A friend tried it with lightroom and could not tell the difference between the jpg and tiff on the display and that is exactly what I was expecting.

  • 8. Re: JPG color / contrast issues
    Frank Caggiano Level 7 Level 7 (23,820 points)

    If you open the JPG and Tiff in preview and using the tools menu are the settings you expect from what you set in Aperture on the export what you see in the exported file?

  • 9. Re: JPG color / contrast issues
    JakeBlade45 Level 1 Level 1 (0 points)

    Frank,

       Yes I just checked that as you suggested and they are correct. Both the same colormodel and profile.

  • 10. Re: JPG color / contrast issues
    Frank Caggiano Level 7 Level 7 (23,820 points)

    I'm out of ideas then. Hopefully kirby will have something else.

     

    regards

  • 11. Re: JPG color / contrast issues
    léonie Level 9 Level 9 (51,675 points)

    The color space setting for export is under presets.

    Checking the TIFF format I see some differences here as well.

    Quality set to 10

    Color space is correct but DPI is only 72... Changing to 400 to see what happens.

    I am using TIFF 16bit... Trying now with 8 bit to see.

    None of the above changed my TIFF image in any noticable way. Still much better than the JPG file when viewed on the display.

    What application are you using to view and compare the exported image files?

     

    How is the" Gamma adjust" slider set? You have not mentioned it sofar?

     

    Have you checked, if you have multiple versions of your color profiles installed? Maybe the programs you are using to view the image files are using different versions of the same color profile:

     

    For example, searching for AdobeRGB1998.icc results in only two installations - one is a link to the other:

     

    • /Library/Application Support/Adobe/Color/Profiles/Recommended/AdobeRGB1998.icc
    • /System/Library/ColorSync/Profiles/AdobeRGB1998.icc

     

    But the image editors may have private copies of the color profiles in the application bundle, and I am not sure, which version they will use, if there are multiple versions, or if the profile used may depend on the image type, like for example for "sRGB.icc":

    Hermione:~ dreschle$ locate sRGB | grep icc

     

    • /Applications/GraphicConverter.app/Contents/Resources/sRGB.icc
    • /Library/Printers/hp/Profiles/sRGB_A.icc
    • /System/Library/ColorSync/Profiles/sRGB Profile.icc
    • /Volumes/HermioneLion/System/Library/ColorSync/Profiles/sRGB Profile.icc
    • /usr/local/etc/ImageMagick/sRGB.icc

     

    You could search for duplicate profiles with the Finder's "Find" ⌘F and add a search rule for the extension ".icc", search range "This Mac": Look for duplicates and compare the dates.

     

    Screen Shot 2013-06-15 at 08.23.43.PNG

  • 12. Re: JPG color / contrast issues
    JakeBlade45 Level 1 Level 1 (0 points)

    Leoni

       Thanks so much for pointing out the Gamma setting as that was it !

     

    I have no idea why it was set differently but it was set to 1.32 where the Tiff was set to 1

    Setting both to 1 solved the problem.

     

    I also will take another detailed look at the color profiles as you have mentioned as well to see if I should do some general cleanup .

     

     

    Thanks again !!

  • 13. Re: JPG color / contrast issues
    léonie Level 9 Level 9 (51,675 points)

    You are welcome, Jake!

    Your mentioning of the "lighter darks" made me think of the Gamma adjustment.

     

    No change I still get the same ligher darks image.

     

    I am glad you could solve this mistery.

    I also will take another detailed look at the color profiles as you have mentioned as well to see if I should do some general cleanup .

    But be carfeful! Some apparent duplicates may be just links. They will be harmless, unless you are seeing versions with different dates.

     

    Cheers

    Léonie