12 Replies Latest reply: Nov 2, 2012 6:37 AM by KathyBraid
KathyBraid Level 1 Level 1 (0 points)

Can I save my images as 8 bit jpeg files in Aperture 3? If so, how? Thank you!


Aperture 3, Mac OS X (10.6.8)
  • 1. Re: 8 bit jpeg files in Aperture 3?
    Frank Caggiano Level 7 Level 7 (23,850 points)

    Aperture does not have the ability to modify the format of an image file when you import it. What it is is what is imported. If you want a specific format you will have to change the file into that format before you import it into Aperture.

     

    The interesting question is why you are looking to do this? Perhaps if we new this a different workflow could be suggested.

     

    regards

  • 2. Re: 8 bit jpeg files in Aperture 3?
    KathyBraid Level 1 Level 1 (0 points)

    Thanks for responding -- I ask this question because I am trying to order a product from a site that requires 8 bit jpeg files in sRGB colorspace and so I want to export the image in that format. I see my question should have been clearer.

  • 3. Re: 8 bit jpeg files in Aperture 3?
    KathyBraid Level 1 Level 1 (0 points)

    You have inspired me to explore further, Frank, and come up with the solution. I discovered that iPhoto 8 exports 8 bit jegs, which is what I need. The way to do this project is to use iPhoto 8 and not my treasured "superior" Aperture 3.

  • 4. Re: 8 bit jpeg files in Aperture 3?
    Ernie Stamper Level 8 Level 8 (37,475 points)

    Your original question was about saving.  If exporting, then Aperture nicely exports 8 bit JPEGs -- it is a choice in the Export dialogue, and no reason to use iPhoto.

     

    Ernie

  • 5. Re: 8 bit jpeg files in Aperture 3?
    léonie Level 9 Level 9 (51,765 points)
    If exporting, then Aperture nicely exports 8 bit JPEGs -- it is a choice in the Export dialogue,

     

    Ernie, I was wondering about that. The "Export" dialog does not offer to specify which kind of jpeg, only "jpeg". And the only control is the quality slider. Do you have any documention, which of the several jpeg codecs modi (8-bit, 12 bit) Aperture is using? 8bit i the most widely used, and I expect that to be the default.

    For Tiff and PSD you can select either 8-bit or 16-bit.

     

    Message was edited by: leonieDF changed "codec" to "modi"

  • 6. Re: 8 bit jpeg files in Aperture 3?
    Frank Caggiano Level 7 Level 7 (23,850 points)

    I'm not sure about Aperture, can;t test it right now, but iPhoto 9.4.1 is exporting jpgs as 8 bit regardless of the import format.

     

    I exported both an imported JPG and and imported RAW file and both were exported as 8 bit according to Preview

     

    Screen Shot 2012-11-01 at 11.14.17.png

    Notice the value by the Depth entry, 8.

     

    If you have the latest Aperture and iPhoto you could continue to use Aperture but then open the library in iPhoto to export it.

     

    This of course assumes that Aperture is not exporting JPG's as 8 bit.

    That is easy enough to check. Just look as an exported JPG from Aperture in Preview and see what the depth value is.

     

    regards

  • 7. Re: 8 bit jpeg files in Aperture 3?
    Ernie Stamper Level 8 Level 8 (37,475 points)

    Aperture only handles JPEGs as 8 bit.  You only can use 16 bit when editing RAW files, or those in TIFF and PSD.

    I will look for the documentation of that, but am sure of the info.

     

    You will note that of the Formats (RAW is not a Format) only TIFF and PDS offer both 8 and 16-bit.

     

    See:

     

    http://blogs.adobe.com/jkost/2010/07/saving_16_bit_images_as_jpeg.html

     

    Which confirms JPEG only supports 8-bit.

     

    Ernie

  • 8. Re: 8 bit jpeg files in Aperture 3?
    Aye Es Oh Level 2 Level 2 (330 points)

    12-bit JPEGs do exist, but are exceedingly rare, and are generally used in specialized industries which do not include photography. As such, few programs support them. Aperture only exports 8-bit JPEGs; I'd be surprised if any Apple program, including QuickTime, exported 12-bit JPEGs.

  • 9. Re: 8 bit jpeg files in Aperture 3?
    Kirby Krieger Level 6 Level 6 (11,945 points)

    Frank Caggiano wrote:

     

    This of course assumes that Aperture is not exporting JPG's as 8 bit.

    That is easy enough to check. Just look as an exported JPG from Aperture in Preview and see what the depth value is.

    I can't check this today, but I am very close to certain that the initial premise of this thread -- that Aperture can export or import a JPG file that is not wholly compatible with 8-bit JPG -- is wrong.  Afaik, JPG = 8-bit (or at the very least 8-bit-compatible), in Aperture, always.

  • 10. Re: 8 bit jpeg files in Aperture 3?
    Ernie Stamper Level 8 Level 8 (37,475 points)

    Yes they exist, and one such user is:

     

    http://www.gwg.nga.mil/ntb/baseline/docs/n010697/bwcguide25aug98.pdf

     

    Also medical grayscale 12-bit images.

     

    But not even that "gold standard" for conversion, Graphic Converter, could handle as far as I can tell.

     

    Ernie

  • 11. Re: 8 bit jpeg files in Aperture 3?
    Frank Caggiano Level 7 Level 7 (23,850 points)

    Finally on a machine with Aperture and yes the JPGs from Aperture are 8 bit as reported by Preview.

     

    So to the OP gping back you your intended original question you can just continue to work as you have been. The JPGs you export from Aperture will be 8 bit

     

    regards

  • 12. Re: 8 bit jpeg files in Aperture 3?
    KathyBraid Level 1 Level 1 (0 points)

    I thank everyone who participated in this discussion -- it shows the value of this forum and the good will and expertise of the members. I have learned that Aperture 3 exports jpegs in 8 bit only.