image processing- i.composite?
Wang Song
wang at cast.uark.edu
Thu Jan 20 16:50:57 EST 1994
Try to run i.grey.scale (linear stretch contrast) for each three bands
before running i.composite.
Song Wang
CAST, University of Arkansas
> I'm trying to use the GRASS image processing facilities on some
> landsat data. But I am unable to produce a satisifactory composite
> image. Have have tried using i.composite and i.colors. Both the
> images produced are far too dark with only the clouds showing as
> white patches. As both of these operations start I get the the
> message:
> WARNING: histogram file missing (or something like)
>
> i.colors should be interactive but it would operate for me other than to
> resize the image and swap bands.
>
> Tom Charnock
> Dept Civil Engineering
> Aston University
> Birmingham UK
> charnotw at aston.ac.uk
>
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