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   i.landsat.rgb auto-balances and enhances the color channels of a
   LANDSAT RGB image to provide a more natural color mixture. Only the
   color table of each image band is modified, the base data remains
   untouched.

   The module works by calculating a histogram for each color channel and
   removing an adjustable amount of outliers from either end before
   recalibrating the color scale with r.colors.

   It will work with any 8-bit RGB imagery set and the script is easily
   modified to work with other datasets of greater band-depth.

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   Depending on the image, it may or may not be advantageous to use the -p
   flag to preserve the relative color scaling. You will have to
   experiment with the different options to find a setting that works best
   for your particular imagery.

   The strength option should generally be set in the 90-99 range. The
   lower the number, the more saturated the image becomes. It represents
   the percentage cut-off for the top end of the color histogram curve.
   The lower end is fixed at 2% of the area under the curve.

   For quicker execution of this module on large images you can achieve
   largely similar results by switching to a coarser resolution before the
   running of the module (using g.region) and then back to the original
   resolution afterwards.

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i.landsat.rgb red=tm.3 green=tm.2 blue=tm.1

TODO

   The strength option requires further refinement.

СÐ. ТÐÐÐÐ

   [1]d.rgb, [2]g.region, [3]i.oif, [4]r.colors, [5]r.composite,
   [6]r.univar,

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   Markus Neteler
   M. Hamish Bowman, Dept. Marine Science, Otago University, New Zealand

   Last changed: $Date: 2006-09-07 04:24:10 -0500 (ЧÑ, 07 Ñен 2006) $

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References

   1. file://localhost/root/tmp/2/fin/d.rgb.html
   2. file://localhost/root/tmp/2/fin/g.region.html
   3. file://localhost/root/tmp/2/fin/i.oif.html
   4. file://localhost/root/tmp/2/fin/r.colors.html
   5. file://localhost/root/tmp/2/fin/r.composite.html
   6. file://localhost/root/tmp/2/fin/r.univar.html