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PNG Palette

Forum|Forum|12 years ago
January 14, 2013
1 reply
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dr_ysg

I have a large NITF image (grey scale, with palette). In the course of a number of transofmrations (reprojection, etc.) it gets converted to an RGBA (the palette is resolved).

Now I want to save it as a PNG. I do not need all the RGB bands. I see that PNGRASTER has a grey scale, and also a pallette option.

Is there a transform to shrink the RGBA to a Grey Scale plus Alpha PNG image (and pallette might also be nice).

The goal is to get the disk size smaller. Just compressing at level 6 is resulting in a 400% explosion from the original NITF.

Best answer by davideagle

Hi - Take a look at the RasterInterpretationCoercer and the RasterPaletteInterpretationCoercer, they might help you out.

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