/**
* This method downscales a band by a given factor
*
* @param inputBand - the input band
* @param scalingFactor - the scaling factor
* @return Band - the downscaled band
*/
public static Band downscaleBand(Band inputBand, float scalingFactor) {
final RenderedImage sourceImage = inputBand.getSourceImage();
final RenderedOp downscaledImage =
ScaleDescriptor.create(
sourceImage,
1.0f / scalingFactor,
1.0f / scalingFactor,
0.0f,
0.0f,
Interpolation.getInstance(Interpolation.INTERP_NEAREST),
null);
Band downscaledBand =
new Band(
inputBand.getName(), inputBand.getDataType(),
downscaledImage.getWidth(), downscaledImage.getHeight());
downscaledBand.setSourceImage(downscaledImage);
return downscaledBand;
}
private Integer createBandH5D(Band band) throws IOException {
final int w = band.getRasterWidth();
final int h = band.getRasterHeight();
long[] dims = new long[] {h, w};
int datasetID = -1;
int fileTypeID = -1;
int fileSpaceID = -1;
try {
fileTypeID = createH5TypeID(band.getDataType());
fileSpaceID = H5.H5Screate_simple(2, dims, null);
datasetID =
H5.H5Dcreate(
_fileID,
"/bands/" + band.getName(),
fileTypeID,
fileSpaceID,
HDF5Constants.H5P_DEFAULT);
try {
// @todo 1 nf/tb - MEMOPT: add min, max here
createScalarAttribute(datasetID, "raster_width", band.getRasterWidth());
createScalarAttribute(datasetID, "raster_height", band.getRasterHeight());
createScalarAttribute(datasetID, "scaling_factor", band.getScalingFactor());
createScalarAttribute(datasetID, "scaling_offset", band.getScalingOffset());
createScalarAttribute(datasetID, "log10_scaled", band.isLog10Scaled() ? "true" : "false");
createScalarAttribute(datasetID, "unit", band.getUnit());
createScalarAttribute(datasetID, "description", band.getDescription());
if (band.getSpectralBandIndex() >= 0) {
createScalarAttribute(datasetID, "spectral_band_index", band.getSpectralBandIndex() + 1);
createScalarAttribute(datasetID, "solar_flux", band.getSolarFlux());
createScalarAttribute(datasetID, "bandwidth", band.getSpectralBandwidth());
createScalarAttribute(datasetID, "wavelength", band.getSpectralWavelength());
}
if (band.getFlagCoding() != null) {
createScalarAttribute(datasetID, "flag_coding", band.getFlagCoding().getName());
}
createScalarAttribute(datasetID, "CLASS", "IMAGE");
createScalarAttribute(datasetID, "IMAGE_VERSION", 1.2F);
if (band.isStxSet()) {
final Stx stx = band.getStx();
createScalarAttribute(datasetID, "min_sample", stx.getMinimum());
createScalarAttribute(datasetID, "max_sample", stx.getMaximum());
}
if (band.getImageInfo() != null) {
final ColorPaletteDef paletteDef = band.getImageInfo().getColorPaletteDef();
float[] minmax =
new float[] {
(float) paletteDef.getMinDisplaySample(), (float) paletteDef.getMaxDisplaySample()
};
createArrayAttribute(datasetID, "IMAGE_MINMAXRANGE", minmax);
}
} catch (IOException e) {
/* ignore IOException because these attributes are not very essential... */
Debug.trace("failed to create attribute: " + e.getMessage());
}
} catch (HDF5Exception e) {
closeH5D(datasetID);
throw new ProductIOException(createErrorMessage(e));
} finally {
closeH5S(fileSpaceID);
closeH5T(fileTypeID);
}
return datasetID;
}
protected void addBandsToProduct(Product product) {
Debug.assertNotNull(getSourceProduct());
Debug.assertNotNull(product);
for (int i = 0; i < getSourceProduct().getNumBands(); i++) {
Band sourceBand = getSourceProduct().getBandAt(i);
String bandName = sourceBand.getName();
if (isNodeAccepted(bandName)) {
Band destBand;
boolean treatVirtualBandsAsRealBands = false;
if (getSubsetDef() != null && getSubsetDef().getTreatVirtualBandsAsRealBands()) {
treatVirtualBandsAsRealBands = true;
}
// @todo 1 se/se - extract copy of a band or virtual band to create deep clone of band and
// virtual band
if (!treatVirtualBandsAsRealBands && sourceBand instanceof VirtualBand) {
VirtualBand virtualSource = (VirtualBand) sourceBand;
destBand =
new VirtualBand(
bandName,
sourceBand.getDataType(),
getSceneRasterWidth(),
getSceneRasterHeight(),
virtualSource.getExpression());
} else {
destBand =
new Band(
bandName,
sourceBand.getDataType(),
getSceneRasterWidth(),
getSceneRasterHeight());
}
if (sourceBand.getUnit() != null) {
destBand.setUnit(sourceBand.getUnit());
}
if (sourceBand.getDescription() != null) {
destBand.setDescription(sourceBand.getDescription());
}
destBand.setScalingFactor(sourceBand.getScalingFactor());
destBand.setScalingOffset(sourceBand.getScalingOffset());
destBand.setLog10Scaled(sourceBand.isLog10Scaled());
destBand.setSpectralBandIndex(sourceBand.getSpectralBandIndex());
destBand.setSpectralWavelength(sourceBand.getSpectralWavelength());
destBand.setSpectralBandwidth(sourceBand.getSpectralBandwidth());
destBand.setSolarFlux(sourceBand.getSolarFlux());
if (sourceBand.isNoDataValueSet()) {
destBand.setNoDataValue(sourceBand.getNoDataValue());
}
destBand.setNoDataValueUsed(sourceBand.isNoDataValueUsed());
destBand.setValidPixelExpression(sourceBand.getValidPixelExpression());
FlagCoding sourceFlagCoding = sourceBand.getFlagCoding();
IndexCoding sourceIndexCoding = sourceBand.getIndexCoding();
if (sourceFlagCoding != null) {
String flagCodingName = sourceFlagCoding.getName();
FlagCoding destFlagCoding = product.getFlagCodingGroup().get(flagCodingName);
Debug.assertNotNull(
destFlagCoding); // should not happen because flag codings should be already in
// product
destBand.setSampleCoding(destFlagCoding);
} else if (sourceIndexCoding != null) {
String indexCodingName = sourceIndexCoding.getName();
IndexCoding destIndexCoding = product.getIndexCodingGroup().get(indexCodingName);
Debug.assertNotNull(
destIndexCoding); // should not happen because index codings should be already in
// product
destBand.setSampleCoding(destIndexCoding);
} else {
destBand.setSampleCoding(null);
}
if (isFullScene(getSubsetDef()) && sourceBand.isStxSet()) {
copyStx(sourceBand, destBand);
}
product.addBand(destBand);
bandMap.put(destBand, sourceBand);
}
}
for (final Map.Entry<Band, RasterDataNode> entry : bandMap.entrySet()) {
copyImageInfo(entry.getValue(), entry.getKey());
}
}