Esempio n. 1
0
  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());
  }
Esempio n. 2
0
  /**
   * 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);
      }
    }
  }