@Override
public RenderedImage postProcessBlankResponse(RenderedImage finalImage, RenderingHints hints) {
// force the current image in RGB or Gray
final ImageWorker imageWorker = new ImageWorker(finalImage);
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
if (!imageWorker.getRenderedImage().getColorModel().hasAlpha()) {
// create an alpha band that is transparent
final ImageWorker imageWorker2 = new ImageWorker(finalImage);
imageWorker2.setRenderingHints(hints);
// trick to get a 0 band
RenderedImage alpha =
imageWorker2.retainFirstBand().multiplyConst(new double[] {0.0}).getRenderedImage();
imageWorker2.dispose();
imageWorker.addBand(alpha, false);
}
RenderedImage result = imageWorker.getRenderedImage();
imageWorker.dispose();
return result;
}
@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;
}