singleChannel = back;
BorderExtender copyExtender = BorderExtender.createInstance(BorderExtender.BORDER_COPY);
RenderingHints extenderHints = new RenderingHints(JAI.KEY_BORDER_EXTENDER, copyExtender);
PlanarImage maskImage = new FastBilateralFilterOpImage(singleChannel,
JAIContext.fileCacheHint,
(float) (depth * scale), 0.1f);
// ParameterBlock pb = new ParameterBlock();
// pb.addSource(maskImage);