public void removeFactorsForCurrentTile(Band targetBand, Tile targetTile, String srcBandName)
throws OperatorException {
Band sourceBand = sourceProduct.getBand(targetBand.getName());
Tile sourceTile = calibrationOp.getSourceTile(sourceBand, targetTile.getRectangle());
targetTile.setRawSamples(sourceTile.getRawSamples());
}
/**
* Called by the framework in order to compute a tile for the given target band.
*
* <p>The default implementation throws a runtime exception with the message "not implemented".
*
* @param targetBand The target band.
* @param targetTile The current tile associated with the target band to be computed.
* @param pm A progress monitor which should be used to determine computation cancelation
* requests.
* @throws org.esa.snap.framework.gpf.OperatorException If an error occurs during computation of
* the target raster.
*/
public void computeTile(Band targetBand, Tile targetTile, ProgressMonitor pm)
throws OperatorException {
final Rectangle targetTileRectangle = targetTile.getRectangle();
final int x0 = targetTileRectangle.x;
final int y0 = targetTileRectangle.y;
final int w = targetTileRectangle.width;
final int h = targetTileRectangle.height;
Tile sourceRaster1 = null;
ProductData srcData1 = null;
ProductData srcData2 = null;
Band sourceBand1 = null;
final String[] srcBandNames = targetBandNameToSourceBandName.get(targetBand.getName());
if (srcBandNames.length == 1) {
sourceBand1 = sourceProduct.getBand(srcBandNames[0]);
sourceRaster1 = calibrationOp.getSourceTile(sourceBand1, targetTileRectangle);
srcData1 = sourceRaster1.getDataBuffer();
} else {
sourceBand1 = sourceProduct.getBand(srcBandNames[0]);
final Band sourceBand2 = sourceProduct.getBand(srcBandNames[1]);
sourceRaster1 = calibrationOp.getSourceTile(sourceBand1, targetTileRectangle);
final Tile sourceRaster2 = calibrationOp.getSourceTile(sourceBand2, targetTileRectangle);
srcData1 = sourceRaster1.getDataBuffer();
srcData2 = sourceRaster2.getDataBuffer();
}
final Unit.UnitType bandUnit = Unit.getUnitType(sourceBand1);
// copy band if unit is phase
if (bandUnit == Unit.UnitType.PHASE) {
targetTile.setRawSamples(sourceRaster1.getRawSamples());
return;
}
final ProductData trgData = targetTile.getDataBuffer();
final TileIndex srcIndex = new TileIndex(sourceRaster1);
final TileIndex tgtIndex = new TileIndex(targetTile);
final int maxY = y0 + h;
final int maxX = x0 + w;
double dn = 0, dn2 = 0, sigma, i, q;
int srcIdx, tgtIdx;
for (int y = y0; y < maxY; ++y) {
srcIndex.calculateStride(y);
tgtIndex.calculateStride(y);
for (int x = x0; x < maxX; ++x) {
srcIdx = srcIndex.getIndex(x);
tgtIdx = tgtIndex.getIndex(x);
if (bandUnit == Unit.UnitType.AMPLITUDE) {
dn = srcData1.getElemDoubleAt(srcIdx);
dn2 = dn * dn;
} else if (bandUnit == Unit.UnitType.INTENSITY) {
dn2 = srcData1.getElemDoubleAt(srcIdx);
} else if (bandUnit == Unit.UnitType.REAL || bandUnit == Unit.UnitType.IMAGINARY) {
if (outputImageInComplex) {
dn = srcData1.getElemDoubleAt(srcIdx);
} else {
i = srcData1.getElemDoubleAt(srcIdx);
q = srcData2.getElemDoubleAt(srcIdx);
dn2 = i * i + q * q;
}
} else {
throw new OperatorException("ALOS Calibration: unhandled unit");
}
if (isComplex && outputImageInComplex) {
sigma = dn * Math.sqrt(calibrationFactor);
} else {
sigma = dn2 * calibrationFactor;
}
if (outputImageScaleInDb) { // convert calibration result to dB
if (sigma < underFlowFloat) {
sigma = -underFlowFloat;
} else {
sigma = 10.0 * Math.log10(sigma);
}
}
trgData.setElemDoubleAt(tgtIdx, sigma);
}
}
}
