Florian,
Currently, I'm integrated the PNEO support in the Orfeo Tool Box. Is there a plan to support LUT metadata for PNEO sensor?
The plan in open source software is most often drawn by people in need for a feature :-) That would be a good contribution if you want to tackle that.
GDAL has the concepts of ColorTable attached to a RasterBand, or RasterAttributeTable (RAT), but from what I can see in the PNEO LUT XML files, not all input values are defined for compactness, just the points that define the curve, so they don't seem to be good fit here. Probably that exposing the content of the <LUT> XML element as a LUT metadata item on the relevant RasterBand could be a good solution.
Even http://www.spatialys.com My software is free, but my time generally not.
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