private static BufferedImage getGaussianBlur(int size, BufferedImage image) { KernelJAI kernel = Functions.getGaussKernel(size / 3.0); ParameterBlock pb = new ParameterBlock(); pb.addSource(image); pb.add(kernel); RenderingHints hints = new RenderingHints( JAI.KEY_BORDER_EXTENDER, BorderExtender.createInstance(BorderExtender.BORDER_COPY)); hints.add(JAIContext.noCacheHint); return JAI.create("LCSeparableConvolve", pb, hints).getAsBufferedImage(); }
private BufferedImage cropScaleGrayscale(Rectangle visibleRect, RenderedImage image) { int minX = image.getMinX(); int minY = image.getMinY(); int width = image.getWidth(); int height = image.getHeight(); Rectangle bounds = new Rectangle(minX, minY, width, height); visibleRect = bounds.intersection(visibleRect); if (bounds.contains(visibleRect)) { ParameterBlock pb = new ParameterBlock(); pb.addSource(image); pb.add((float) visibleRect.x); pb.add((float) visibleRect.y); pb.add((float) visibleRect.width); pb.add((float) visibleRect.height); image = JAI.create("Crop", pb, JAIContext.noCacheHint); } Dimension previewSize = getSize(); if ((visibleRect.width > previewSize.width) || (visibleRect.height > previewSize.height)) { float scale = Math.min( previewSize.width / (float) visibleRect.width, previewSize.height / (float) visibleRect.height); image = ConvolveDescriptor.create(image, Functions.getGaussKernel(.25 / scale), null); ParameterBlock pb = new ParameterBlock(); pb.addSource(image); pb.add(scale); pb.add(scale); image = JAI.create("Scale", pb, JAIContext.noCacheHint); } image = Functions.toColorSpace(image, JAIContext.systemColorSpace, null); if (image.getSampleModel().getDataType() == DataBuffer.TYPE_USHORT) { image = Functions.fromUShortToByte(image, null); } return Functions.toFastBufferedImage(image); }