Multi-level Source Image
Product product = new Product("test", "test", width, height);
product.setPreferredTileSize(tileSize, tileSize);
product.setNumResolutionsMax(5);
Band inputBand1 = product.addBand("input_band_1", "X * X - Y * Y", ProductData.TYPE_FLOAT64);
Band inputBand2 = product.addBand("input_band_2", "2 * X * Y", ProductData.TYPE_FLOAT64);
Band outputBand = product.addBand("output_band", ProductData.TYPE_FLOAT64);
final MultiLevelModel multiLevelModel = ImageManager.getMultiLevelModel(inputBand1);
final MultiLevelSource multiLevelSource = new AbstractMultiLevelSource(multiLevelModel) {
@Override
public void reset() {
super.reset();
outputBand.fireProductNodeDataChanged();
}
@Override
public RenderedImage createImage(int level) {
return new RasterDataNodeOpImage(outputBand, ResolutionLevel.create(getModel(), level)) {
@Override
protected void computeProductData(ProductData outputData, Rectangle region) throws IOException {
int numElems = region.width * region.height;
ProductData inputData1 = ProductData.createInstance(ProductData.TYPE_FLOAT64, numElems);
ProductData inputData2 = ProductData.createInstance(ProductData.TYPE_FLOAT64, numElems);
inputBand1.readRasterData(region.x, region.y, region.width, region.height, inputData1);
inputBand2.readRasterData(region.x, region.y, region.width, region.height, inputData2);
for (int i = 0; i < numElems; i++) {
double value1 = inputData1.getElemDoubleAt(i);
double value2 = inputData2.getElemDoubleAt(i);
outputData.setElemDoubleAt(i, value1 - value2);
}
}
};
}
};
outputBand.setSourceImage(new DefaultMultiLevelImage(multiLevelSource));