[gdal-dev] Combining TIFFs w/ different color palettes

[Frank Warmerdam]

On 11-01-05 04:06 PM, MyKillK wrote:
>
> Hello all,
>
> My question is simple. Is it possible to combine two GeoTIFFs, each with its
> own unique color palette into a single image that is properly color mapped?
> Each image only has 16 colors so I feel like it should be possible to copy
> Image #1's color table straight into indexes 0-15 and then remap Image #2's
> color table to indexes 16-31. For the life of I can't figure out how this
> can be done, it always wants to use Image #1's color table alone in the
> merged TIFF.

Michael,

I am not aware of any existing GDAL application to do this.  You  could
use pct2rgb.py on each image, merge the RGB images, and then use rgb2pct.py
to produce a paletted image from the result that would likely have 32 colors.

Best regards,
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