Hello,
I have some big, on-fly generated 16 bit raster images (color model is
DirectColorModel) from another service which I use as source images for
GridCoverage2D. Their BufferedImage type is BufferedImage.TYPE_USHORT_555_RGB.
However creating grid coverage fails:
BufferedImage image = ImageIO.read(filename);
GridCoverage2D grid = factory.create("results", image, new
ReferencedEnvelope(y1, y2, x1, x2, crs));
->
Exception in thread "BackgroundImageRenderer-0"
java.lang.IllegalArgumentException: Illegal argument: "type=null".
at org.geotools.coverage.TypeMap.map(TypeMap.java:407)
at org.geotools.coverage.TypeMap.isFloatingPoint(TypeMap.java:362)
at
org.geotools.coverage.grid.RenderedSampleDimension.create(RenderedSampleDimension.java:252)
at
org.geotools.coverage.grid.RenderedSampleDimension.create(RenderedSampleDimension.java:138)
at
org.geotools.coverage.grid.GridCoverage2D.<init>(GridCoverage2D.java:233)
at
org.geotools.coverage.grid.GridCoverageFactory.create(GridCoverageFactory.java:590)
at
org.geotools.coverage.grid.GridCoverageFactory.create(GridCoverageFactory.java:514)
at
org.geotools.coverage.grid.GridCoverageFactory.create(GridCoverageFactory.java:455)
BufferedImage.TYPE_BYTE_INDEXED and BufferedImage.TYPE_INT_RGB work fine, but
the native format of the picture is TYPE_USHORT_555. Conversion takes time and
BYTE_INDEXED loses quality and TYPE_INT_RGB takes too much memory.
>From the code of TypeMap it seems that it should support 16 bit images.
Markus
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