//
assertNotNull((OperationDescriptor)
JAI.getDefaultInstance().getOperationRegistry().
getDescriptor(OperationDescriptor.class, "org.geotools.ColorInversion"));
pbj = new ParameterBlockJAI("org.geotools.ColorInversion");
pbj.addSource(
new ImageWorker(image).
setRenderingHint(JAI.KEY_IMAGE_LAYOUT,
new ImageLayout(image).setTileGridXOffset(0).setTileGridYOffset(0).setTileHeight(64).setTileWidth(64)
).tile().getRenderedImage()
);