@Test public void lossyWrite() throws Exception { File f = File.createTempFile("test-jpeg2000-lossy", ".jp2"); f.deleteOnExit(); Iterator<ImageWriter> writers = ImageIO.getImageWritersBySuffix("jp2"); assertTrue(writers.hasNext()); ImageWriter writer = writers.next(); J2KImageWriteParam writeParams = (J2KImageWriteParam) writer.getDefaultWriteParam(); writeParams.setLossless(false); writeParams.setCompressionMode(ImageWriteParam.MODE_EXPLICIT); writeParams.setCompressionType("JPEG2000"); // writeParams.setFilter(J2KImageWriteParam.FILTER_97); writeParams.setCompressionQuality(0.0f); writeParams.setEncodingRate(0.5f); ImageOutputStream ios = ImageIO.createImageOutputStream(f); writer.setOutput(ios); writer.write(null, new IIOImage(image, null, null), writeParams); writer.dispose(); ios.close(); assertTrue("Expected file size < 1MB", f.length() < 128 * 1024); // System.out.println(f.length()); BufferedImage read = ImageIO.read(f); assertEquals(SIZE, read.getWidth()); }