hi everyone,
it looks like that imagemosaic-jdbc only supports png format. For a project
in our research group we have to support also tiff files with float pixel
values.
i started to look into the code and know where to make the modifications.
My question now is:
I have to create a BufferedImage that deals with float values coming from a
float data buffer, filled with data coming from the database.
- postgis database returns at tif (st_astiff) in binary array
- the array is passed to the jai decoder from which i get a buffered image
SeekableStream stream = new ByteArraySeekableStream(imageBytes);
String decoderName = null;
for (String dn : ImageCodec.getDecoderNames(stream)) {
decoderName = dn;
break;
}
ImageDecoder decoder = ImageCodec.createImageDecoder(decoderName,
stream, null);
PlanarImage img = PlanarImage.wrapRenderedImage(decoder
.decodeAsRenderedImage());
return img.getAsBufferedImage();
- the buffered image has then as color model:
FloatDoubleColorModel: ColorModel: #pixelBits = 32 numComponents = 1 color
space = java.awt.color.ICC_ColorSpace@6f42ac7 transparency = 1 has alpha =
false isAlphaPre = false
- the buffered image has then as sample model:
ComponentSampleModelJAI: dataType=4 numBands=1 width=78 height=130
bandOffsets=[ 0]
The problem is now, that when making a getfeatureinfo on that wms layer with
geoserver I get incorrect values, while the shape of the image is ok.
Any suggestion what am I doing wrong?
Do I use the wrong sample model?
thanks for any help
Markus
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