ICC gamut mapping

Discussion in 'Darkroom Developing and Printing' started by Dale, Mar 6, 2014.

  1. Dale

    Dale Guest

    The ICC
    http://www.color.org
    has four gamut rendering intents

    colorimetric, including light source conversion as some semblance of
    appearance consideration, and no shrinking of the output gamut to
    include out of gamut colors, out of gamut colors are clipped to the
    output gamut

    absolute colorimetric, no light source conversion, no output gamut
    shrinking, for measurement use cases primarily I guess

    saturation, where the output gamut is shrunk considering saturation to
    include colors mapped to the output space that are out of gamut with the
    saturation maintained over color considerations

    perceptual, where the output gamut is shrunk to include out of gamut
    colors in a pleasant appearance based on an ideal print gamut, PRM(G)
    http://www.color.org/v4_prmg.xalter

    wouldn't it be better to provide the user more choices on perceptual
    rendering based on different outputs? transparencies and translucencies
    have a much bigger gamut than a print and are created digitally now too

    I don't remember the math terms used for gamut construction and
    conversion, I used to work/edit with MATLAB scripts from the scientists
    that did this but I was just a systems engineer
     
    Dale, Mar 6, 2014
    #1
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  2. Dale

    Dale Guest

    projections (motion picture, business, etc.) fall into this category too
     
    Dale, Mar 6, 2014
    #2
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  3. Dale

    Dale Guest

    there is also the use case of soft display as opposed to soft proof

    sure, you could probably configure a soft proof implementation for soft
    display, but that is kludgey

    soft display would require the rendering intents to be applied to the
    input, if output from there an appearance standard/choice would be
    required to meet the output intent chosen
     
    Dale, Mar 6, 2014
    #3
  4. Dale

    Dale Guest

    nothing better to do
     
    Dale, Mar 8, 2014
    #4
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