private byte[] getROIData(ROI roi, Rectangle rectIMG) {
byte[] dataROI;
PlanarImage roiIMG = roi.getAsImage();
Rectangle rectROI = roiIMG.getBounds();
// Forcing to component colormodel in order to avoid packed bits
ImageWorker w = new ImageWorker();
w.setImage(roiIMG);
w.forceComponentColorModel();
RenderedImage img = w.getRenderedImage();
//
BufferedImage test =
new BufferedImage(rectIMG.width, rectIMG.height, BufferedImage.TYPE_BYTE_GRAY);
ImageLayout2 layout = new ImageLayout2(test);
layout.setMinX(img.getMinX());
layout.setMinY(img.getMinY());
layout.setWidth(img.getWidth());
layout.setHeight(img.getHeight());
// Lookup
byte[] lut = new byte[256];
lut[255] = 1;
lut[1] = 1;
LookupTableJAI table = new LookupTableJAI(lut);
RenderingHints hints = new RenderingHints(JAI.KEY_IMAGE_LAYOUT, layout);
RenderedOp transformed = LookupDescriptor.create(img, table, hints);
Graphics2D gc2d = null;
// Translation parameters in order to position the ROI data correctly in the Raster Space
int trX = -rectIMG.x + rectROI.x - rectIMG.x;
int trY = -rectIMG.y + rectROI.y - rectIMG.y;
try {
gc2d = test.createGraphics();
gc2d.drawRenderedImage(transformed, AffineTransform.getTranslateInstance(trX, trY));
} finally {
gc2d.dispose();
}
Rectangle testRect = new Rectangle(rectIMG.width, rectIMG.height);
DataBufferByte dbRoi = (DataBufferByte) test.getData(testRect).getDataBuffer();
dataROI = dbRoi.getData();
// BufferedImage is stored in memory so the planarImage chain before can be disposed
ImageUtilities.disposePlanarImageChain(transformed);
// Flush of the BufferedImage
test.flush();
return dataROI;
}
@Override
public RenderedImage postProcessMosaic(
RenderedImage mosaic, ROI overallROI, RenderingHints hints) {
// force the current image in RGB or Gray
final ImageWorker imageWorker = new ImageWorker(mosaic);
hints = prepareHints(hints);
imageWorker.setRenderingHints(hints);
// make sure the mosaic image is either gray of RGB
if (!imageWorker.isColorSpaceGRAYScale()) {
if (!imageWorker.isColorSpaceRGB()) {
imageWorker.forceColorSpaceRGB();
}
}
imageWorker.forceComponentColorModel(); // todo optimize with paletted imagery
// do we already have a alpha band in the input image?
if (imageWorker.getRenderedImage().getColorModel().hasAlpha()) {
// if so we reuse it applying the ROI on top of it
RenderedImage alpha = imageWorker.retainLastBand().getRenderedImage();
RenderedImage maskedAlpha =
new ImageWorker(hints)
.mosaic(
new RenderedImage[] {alpha},
MosaicDescriptor.MOSAIC_TYPE_OVERLAY,
null,
new ROI[] {overallROI},
null,
null)
.getRenderedImage();
imageWorker.retainBands(mosaic.getColorModel().getNumColorComponents());
imageWorker.addBand(maskedAlpha, false, true, null);
} else {
// turn the roi into a single band image and add it to the mosaic as transparency
final ImageWorker roiImageWorker = new ImageWorker(overallROI.getAsImage());
roiImageWorker.setRenderingHints(hints);
PlanarImage alpha =
roiImageWorker.forceComponentColorModel().retainFirstBand().getPlanarImage();
if (!alpha.getBounds().equals(imageWorker.getPlanarImage().getBounds())) {
// build final layout and use it for giving the alpha band a simil size and tiling
// to the one of the image
final ImageLayout layout =
new ImageLayout(
mosaic.getMinX(), mosaic.getMinY(), mosaic.getWidth(), mosaic.getHeight());
//
final SampleModel sampleModel = mosaic.getSampleModel();
layout.setTileHeight(sampleModel.getWidth()).setTileWidth(sampleModel.getHeight());
hints.add(new RenderingHints(JAI.KEY_IMAGE_LAYOUT, layout));
// correct bounds of the current image
alpha =
new ImageWorker(hints)
.mosaic(
new RenderedImage[] {alpha},
MosaicDescriptor.MOSAIC_TYPE_OVERLAY,
null,
new ROI[] {overallROI},
null,
null)
.getRenderedOperation();
}
imageWorker.addBand(alpha, false, true, null);
}
RenderedImage result = imageWorker.getRenderedImage();
return result;
}
/**
* Checking if NoData and ROI are defined correctly
*
* @param indexed
* @param image
* @param roi
* @param nodata
* @param destNoData
*/
private void checkNoDataROI(
RenderedImage indexed, RenderedImage image, ROI roi, Range nodata, int destNoData) {
// Ensure the dimensions are the same
assertEquals(indexed.getMinX(), image.getMinX());
assertEquals(indexed.getMinY(), image.getMinY());
assertEquals(indexed.getWidth(), image.getWidth());
assertEquals(indexed.getHeight(), image.getHeight());
boolean roiExists = roi != null;
boolean nodataExists = nodata != null;
// Simply ensure no exception is thrown
if (!nodataExists && !roiExists) {
PlanarImage.wrapRenderedImage(indexed).getTiles();
return;
}
if (nodataExists) {
nodata = RangeFactory.convertToDoubleRange(nodata);
}
RandomIter roiIter = null;
Rectangle roiBounds = null;
if (roiExists) {
PlanarImage roiIMG = roi.getAsImage();
roiIter = RandomIterFactory.create(roiIMG, null, true, true);
roiBounds = roi.getBounds();
}
// Else check ROI and NoData
RandomIter sourceIter = RandomIterFactory.create(image, null, true, true);
RandomIter destIter = RandomIterFactory.create(indexed, null, true, true);
// Start the iteration (we iterate only the first band)
int w = image.getWidth();
int h = image.getHeight();
int minX = image.getMinX();
int minY = image.getMinY();
int maxX = minX + w;
int maxY = minY + h;
int limx = minX - image.getTileGridXOffset();
int limy = minY - image.getTileGridYOffset();
Rectangle translated = new Rectangle(limx, limy, w, h);
for (int y = minY; y < maxY; y++) {
for (int x = minX; x < maxX; x++) {
double src = sourceIter.getSampleDouble(x, y, 0);
double dest = destIter.getSampleDouble(x, y, 0);
boolean valid = true;
// ROI Check
if (roiExists
&& !(roiBounds.contains(x, y) && roiIter.getSample(x, y, 0) > 0)
&& translated.contains(x, y)) {
valid = false;
}
// NoData Check
if (nodataExists && nodata.contains(src)) {
valid = false;
}
if (!valid) {
assertEquals(destNoData, dest, TOLERANCE);
}
}
}
}
