Re: Correct way to 'normalize' multiple picture to the same colors

From	Martin Leese <please@see.Web.for.e-mail.INVALID>
Newsgroups	sci.image.processing
Subject	Re: Correct way to 'normalize' multiple picture to the same colors
Date	2017-02-01 10:56 -0700
Organization	A noiseless patient Spider
Message-ID	<o6t7cm$sld$1@dont-email.me> (permalink)
References	<f701c344-f080-4d84-b981-002e2801ded9@googlegroups.com>

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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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Correct way to 'normalize' multiple picture to the same colors avishaiben@gmail.com - 2017-01-31 16:38 -0800
  Re: Correct way to 'normalize' multiple picture to the same colors Martin Leese <please@see.Web.for.e-mail.INVALID> - 2017-02-01 10:56 -0700

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