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  • Correct way to 'normalize' multiple picture to the same colors

    From avishaiben@gmail.com@21:1/5 to All on Tue Jan 31 16:38:07 2017
    Hi all,

    First post here.

    I am taking thousands of photos on similar background and looking for things on top of that. The problem is that I see that the background color means and covs changes. That affects the colors of the things I am looking for.

    What is the correct way to correct for that? Can I somehow normalize all the colors of the picture to the background?

    Thanks,
    Avishai

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  • From Martin Leese@21:1/5 to avishaiben@gmail.com on Wed Feb 1 10:56:09 2017
    avishaiben@gmail.com wrote:
    Hi all,

    First post here.

    I am taking thousands of photos on similar background and looking for things on top of that. The problem is that I see that the background color means and covs changes. That affects the colors of the things I am looking for.

    What is the correct way to correct for that? Can I somehow normalize all the colors of the picture to the background?

    The first question to ask is *why* are the
    colours changing? If you keep the
    illumination and camera settings constant
    then the colours should be consistent.
    This is the correct way to correct this.

    How to normalise images that you are stuck
    with depends on two things:

    1. Why they are not normal? (Why are they
    different?) What changed?
    2. What is the background? If it is a
    solid single colour then you may have
    problems.

    Finally, what are "covs"?

    --
    Regards,
    Martin Leese
    E-mail: please@see.Web.for.e-mail.INVALID
    Web: http://members.tripod.com/martin_leese/

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