Photoshop CS Question

Discussion in 'Photoshop' started by Steven Wandy, Jan 6, 2004.

  1. Steven Wandy

    Steven Wandy Guest

    I just got the Olympus E1. When I shoot in highest quality JPEG the files
    sizes are usually between 3 and 4 MB. I open the images in PS-CS, do
    whatever I wish to them and resave as JPEG at highest quality level (12).
    The resulting images are usually between 5 and 6 MB.
    (1) What is the reason for the increase?
    (2) Would it make more sense to lower the quality of the level that PSCS
    saves the file in to get back to around the original size?
    Thanks
     
    Steven Wandy, Jan 6, 2004
    #1
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  2. Steven Wandy

    Stephan Guest

    "Steven Wandy" <> wrote in message
    news:CeGKb.168891$...
    > I just got the Olympus E1. When I shoot in highest quality JPEG the files
    > sizes are usually between 3 and 4 MB. I open the images in PS-CS, do
    > whatever I wish to them and resave as JPEG at highest quality level (12).
    > The resulting images are usually between 5 and 6 MB.
    > (1) What is the reason for the increase?


    Probably a different way of compressing, not sure.

    > (2) Would it make more sense to lower the quality of the level that PSCS
    > saves the file in to get back to around the original size?


    Not at all, why would you want to degrade your pictures?
    Jpeg is for web, save your pictures as Tiff.

    Stephan
     
    Stephan, Jan 6, 2004
    #2
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  3. Steven Wandy

    mdavis Guest

    I'm not familiar with the E-1, but I suspect the maximum JPEG being used by
    the E-1 is lower than 12. Try loading the image into PS CS and immediately
    click on "Save As" and see what the JPEG offering is in the window.
     
    mdavis, Jan 7, 2004
    #3
  4. Steven Wandy

    Dr. J. Smith Guest

    > > (1) What is the reason for the increase?

    The original files are compressed more. To compare, in the PS save dialog
    they'd probably be in the 'high' range as apposed to the 'maximum' range
    that you're resaving them in. I guess it saves space on your camera card.

    > (2) Would it make more sense to lower the quality of the level that PSCS
    > saves the file in to get back to around the original size?


    Is there a reason you want to get it back to the original size? To be clear,
    the original size (pixel x pixel) of the image doesn't change, just the
    amount of disc space it takes up does.

    As for your question, it depends. Jpeg is a lossy format and as such is best
    used to save disc space (or bandwidth) only AFTER you are completely done
    editing. Every time you open a jpeg image, make changes and save it again
    (recompress it) as a jpeg you will lower the quality of the image. Tiff is
    probably the most widely used lossless format and will allow you to save
    layers and masks though this will increase its size on disc. As well tiff
    can use LZW compression to lower it's size which works to varying degrees,
    usually.
     
    Dr. J. Smith, Jan 7, 2004
    #4
  5. Steven Wandy

    Dr. J. Smith Guest

    "mdavis" <> wrote in message
    news:EKJKb.216$...
    > I'm not familiar with the E-1, but I suspect the maximum JPEG being used

    by
    > the E-1 is lower than 12. Try loading the image into PS CS and

    immediately
    > click on "Save As" and see what the JPEG offering is in the window.
    >
    >


    Does the dialog box not offer up the last used setting?
     
    Dr. J. Smith, Jan 7, 2004
    #5
  6. Steven Wandy

    AKsteve Guest

    Sounds like you are saving these for web viewing. If you want to print them
    it would be better to save them as tiffs - file size will be much larger but
    quality will be better.

    Anyway, I would suggest using the "save for web" command under the file
    menu. Once there, you can mess with the jpg settings to get the size and
    quality you want.

    Steve

    "Steven Wandy" <> wrote in message
    news:CeGKb.168891$...
    > I just got the Olympus E1. When I shoot in highest quality JPEG the files
    > sizes are usually between 3 and 4 MB. I open the images in PS-CS, do
    > whatever I wish to them and resave as JPEG at highest quality level (12).
    > The resulting images are usually between 5 and 6 MB.
    > (1) What is the reason for the increase?
    > (2) Would it make more sense to lower the quality of the level that PSCS
    > saves the file in to get back to around the original size?
    > Thanks
    >
    >
     
    AKsteve, Jan 7, 2004
    #6
  7. Steven Wandy

    mdavis Guest

    Sure, but the bottom of the window will give you the filesize for
    comparison. You can switch JPEG compressions settings and see what is
    closest to the JPEG from the camera for the unaltered image.
     
    mdavis, Jan 7, 2004
    #7
  8. Steven Wandy

    Stephan Guest

    "AKsteve" <> wrote in message
    news:...
    > Sounds like you are saving these for web viewing. If you want to print

    them
    > it would be better to save them as tiffs - file size will be much larger

    but
    > quality will be better.


    No, you won't see a difference when you print.

    >
    > snip<


    Stephan
     
    Stephan, Jan 7, 2004
    #8
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