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Re: normalization image

From Martin Leese <please@see.Web.for.e-mail.INVALID>
Newsgroups sci.image.processing
Subject Re: normalization image
Date 2016-04-21 12:54 -0600
Organization A noiseless patient Spider
Message-ID <nfb7fk$12h$1@dont-email.me> (permalink)
References <73948fcb-66e3-44e3-8dea-0e17c21fdb3e@googlegroups.com>

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mhd62976@gmail.com wrote:
> when we do normalization for image i.e r=R/(R+G+B)
> some times in  the pixel we get 0/0...then what shall we do
> 
> ignor this pixel? or replace it by zero or replace this pixel by small number

What would you like to do?  Mathematically,
0/0 is undefined, so there is no correct way
to handle it.  What you do is whatever is
best for your particular image data and your
particular use of that data.

Note that you can't use L'Hôpital's rule
because you don't know in what direction to
estimate the derivatives (assuming that
derivatives even make sense for your
particular image data).

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

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normalization  image mhd62976@gmail.com - 2016-04-21 01:45 -0700
  Re: normalization  image Martin Leese <please@see.Web.for.e-mail.INVALID> - 2016-04-21 12:54 -0600

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