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iPhoto Grainy But Preview Fine - Mac Applications & Software

Sorry if this has been covered before (didn't see anything on the terms I googled). We're playing with a slide scanner, scanning color slides at 2400 DPI. The resulting scans look great in Preview (or Graphic Converter) but they're really grainy in iPhoto 2. Does anyone have any suggestions? I've tried re-saving the JPEG files in both Preview and GC and even as a PICT with the same results. Thanks! H. -- To reply via email, replace "LastNameHere" with my last name....

  1. #1

    Default iPhoto Grainy But Preview Fine

    Sorry if this has been covered before (didn't see anything on the terms
    I googled).

    We're playing with a slide scanner, scanning color slides at 2400 DPI.
    The resulting scans look great in Preview (or Graphic Converter) but
    they're really grainy in iPhoto 2.

    Does anyone have any suggestions? I've tried re-saving the JPEG files
    in both Preview and GC and even as a PICT with the same results.

    Thanks!

    H.

    --
    To reply via email, replace "LastNameHere" with my last name.
    Herb Guest

  2. #2

    Default Re: iPhoto Grainy But Preview Fine

    >We're playing with a slide scanner, scanning color slides at 2400 DPI. 

    They are not grainy; there's no "grain" in a continuous-tone digital image.

    They're pixelated. They look pixelsated in iPhoto because a 2400 pixel per inch
    scan is huge, and iPhoto is scaling the picture down to fit on your computer
    screen. Programs like GraphicConverter use a sophisticated algorithm to scale
    pictures down to fit on your monitor. iPhoto uses a less sophisticated
    technique; the result is that the scaled-down image looks pixelated.

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    Tacit Guest

  3. #3

    Default Re: iPhoto Grainy But Preview Fine

    In <aol.com> Tacit wrote: 
    >
    > They are not grainy; there's no "grain" in a continuous-tone digital
    > image.
    >
    > They're pixelated. They look pixelsated in iPhoto because a 2400 pixel
    > per inch scan is huge, and iPhoto is scaling the picture down to fit
    > on your computer screen. Programs like GraphicConverter use a
    > sophisticated algorithm to scale pictures down to fit on your monitor.
    > iPhoto uses a less sophisticated technique; the result is that the
    > scaled-down image looks pixelated.
    >[/ref]
    Thank you for the enlightenment. I was wondering why some of the scanned
    images from my iBook and Canon scanner look so pixelated when I transfer
    them to my recently purchased PowerMac.
    Chey Guest

  4. #4

    Default Re: iPhoto Grainy But Preview Fine

    In article <aol.com>,
    com (Tacit) wrote:
     
    >
    > They are not grainy; there's no "grain" in a continuous-tone digital image.[/ref]

    I know, but they actually look grainy as opposed to pixelated :-)
     


    That's what I was afraid of. We'll see how they print and transfer up
    to the sharing service my SO uses. Thanks for the confirmation.

    Cheers,

    H.

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    To reply via email, replace "LastNameHere" with my last name.
    Herb Guest

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