Tiff compression using Java ImageIO
35,707
Solution 1
Writer.getDefaultWriteParam()
only creates an ImageWriteParam
object, it doesn't link it back to anything else.
I don't see any mechanism in your code for your modified param
object to be subsequently used in the ImageWriter
.
I believe that instead of:
writer.write(bi);
you need to use:
writer.write(null, new IIOImage(bi, null, null), param);
Solution 2
I don't know Java IO, but generally you want to look at a few things
- Can you use JPEG compression instead of LZW?
- See how to set the TIFF strip size -- if small size is what you want, set it to the height of the image.
Edit: Looks like a TiffWriteParam has the following methods
tiffWriteParam.setTilingMode(ImageWriteParam.MODE_EXPLICIT);
tiffWriteParam.setTiling(imageWidth, imageHeight, 0, 0);
set the imageWidth and imageHeight vars to your image's size. The downside is that it will be slower to read out regions of the image.
Comments
-
CFreiner almost 2 years
I am having issues converting a png to tiff. The conversion goes fine, but the image is huge. I think the issue is that I am not doing the compression correctly? Anyone have any suggestions??
Here is the code sample
public static void test() throws IOException { // String fileName = "4958813_1"; String fileName = "4848970_1"; String inFileType = ".PNG"; String outFileType = ".TIFF"; ImageIO.scanForPlugins(); File fInputFile = new File("I:/HPF/UU/" + fileName + inFileType); InputStream fis = new BufferedInputStream(new FileInputStream( fInputFile)); PNGImageReaderSpi spi = new PNGImageReaderSpi(); ImageReader reader = spi.createReaderInstance(); ImageInputStream iis = ImageIO.createImageInputStream(fis); reader.setInput(iis, true); BufferedImage bi = reader.read(0); TIFFImageWriterSpi tiffspi = new TIFFImageWriterSpi(); ImageWriter writer = tiffspi.createWriterInstance(); //Iterator<ImageWriter> iter = ImageIO.getImageWritersByFormatName("TIFF"); //ImageWriter writer = iter.next(); ImageWriteParam param = writer.getDefaultWriteParam(); param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT); param.setCompressionType("LZW"); param.setCompressionQuality(0.5f); File fOutputFile = new File("I:\\HPF\\UU\\" + fileName + outFileType); ImageOutputStream ios = ImageIO.createImageOutputStream(fOutputFile); writer.setOutput(ios); writer.write(bi); }