[GRASS-user] RGB to Grayscale

Travis Kirstine traviskirstine at gmail.com
Thu May 10 12:01:47 EDT 2007

Hi All,
I am trying to convert a RGB image to a single band grayscale image by
converting the RGB to HIS then exporting the Hue and Intensity (I
would like to export a grayscale geotiff with gdal).  Am I correct in
that a "true" greyscale image is just the hue and intensity, and is it
possible to merge the bands to a single band image?  Any help would be

Travis K.

Toronto, Canada
"She knows there's no success like failure
And that failure's no success at all."
-Bob Dylan-

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