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From: "Christian " <christian_zepeda_e@yahoo.com.ar>
Newsgroups: comp.soft-sys.matlab
Subject: Re: Detection of pixels
Date: Thu, 1 Nov 2007 01:28:36 +0000 (UTC)
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"Christian " <christian_zepeda_e@yahoo.com.ar> wrote in
message <fgas35$dqm$1@fred.mathworks.com>...
> 
> I have a picture in rgb corresponding to a map, this image
> contains a lake, and I need to separate the image of water
> from the rest of colors that presents the image, so as to
> obtain the number of pixels corresponding to water.
> 
> Appreciate that someone might have an idea as I do not know
> how to begin.
> 	
> 		

The image is an image Lansat, ".tif" format, is rgb real
color and well-defined sectors of water, so that certain
colors necessarily represent levels of water, so it is
necessary to define how many pixels represent this region of
interest and this exactly represented by shades of blue hue.

In my version I have installed the MATLAB toolbox processing
images.

A hug.

Christian