MathGroup Archive: May 2010 [00226]

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Converting colors to height values

To: mathgroup at smc.vnet.net
Subject: [mg109740] Converting colors to height values
From: finkh <howardfink at gmail.com>
Date: Fri, 14 May 2010 05:36:06 -0400 (EDT)

The Lunar Orbiter Laser Altimeter has a website http://lro.gsfc.nasa.gov/lola/science.html
where jpegs are posted of regions of the moon.  I would like to
convert the color information to height values.  A scale is posted
with the images that looks a lot like Rainbow, a ColorFunction.  I
have Inserted the jpeg of Copernicus into a mathematica notebook.  It
has 5 dimensions, which look like rows, columns, and RGB, where RGB
runs from 0 to 255.  How can I convert an RGB Rainbow triple to a
single number?

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