how to compensate for low dynamic range monitors?

Discussion in 'Optometry Archives' started by kiki, Nov 29, 2004.

  1. kiki

    kiki Guest

    Hi all,

    I have a bright image which is taken using good camera, and I upsampled it
    to a higher resolution(say NxN larger size)... and then applied some image
    processing, color space conversion, gamma transformation, inverse gamma,
    filtering, etc... and the new image look dark...(or equavalent, the LCD
    monitor does not support the new image due to its limited dynamic range...
    what can I do to compensate for the low dynamic range and still make the new
    one viewed from several meters a way the same as the old one?

    Thanks a lot,
     
    kiki, Nov 29, 2004
    #1
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  2. kiki

    Jerry Avins Guest

    I can guess what you're doing because of what you've written in other
    threads. I don't like to guess, mostly because I'm too likely to waste
    time and cogitation by guessing wrong. If this is the same problem you
    already provided details about in another thread, starting a new thread
    won't get you new information or recruit new gurus to your cause.

    Examine the image after each processing step to learn which one dims it.
    Learn how to do gamma correction. (Google) Brightness is increased by
    adding a constant to each pixel. Be sure to make it color neutral.
    Contrast is done by multiplying, but adjusting offset (brightness) is
    often also needed.

    You seem to be doing sophisticated transformations on images without
    having enough of the ground concepts to guide you. Dig into that. Think
    about the brightness and contrast controls on an old B&W TV.

    Jerry
     
    Jerry Avins, Nov 29, 2004
    #2
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