Working with large image files

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  • wschlichtman

    #1

    Working with large image files

    I am running into speed issues when attempting to work with larger image
    files, e.g., 5 M/Pixel photos. I have been experimenting with in-memory
    working images which are scaled down to a more managable size. This seems to
    work well, taking a GrayScale operation from 1850 milliseconds to about 300,
    but then I run into problems when I wish to save work that's been done to the
    image, such as a NoiseRemoval operation. The working file has been changed,
    but the base file is unchanged and saving out the working file would lose
    resolution.

    Comparing my performance to something like Photoshop, I have found good
    results using the working image, but the base image is not satisfactory. Am I
    on the right track here, or are there better ways to work with the base image
    and still get satisfactory performance?

    Any help, including a good design text, would be greatly appreciated.

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