Cfrgtkky

I have a jpg image and I want to convert it to a tiff file, but when I create the output file from byteArrayOutputStream, the output file has 0 byte length.

public static void main(String args) throws Exception {

    String root = "E:\Temp\imaging\test\";



    File image = new File(root + "0riginalTif-convertedToJpg.JPG");



    byte bytes = compressJpgToTiff(image);

    File destination = new File(root + "OriginalJpg-compressedToTiff.tiff");

    FileOutputStream fileOutputStream = new FileOutputStream(destination);

    fileOutputStream.write(bytes);

}





public static byte compressJpgToTiff(File imageFile) throws Exception {

    ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(255);

    ImageOutputStream imageOutputStream = null;

    try {

        File input = new File(imageFile.getAbsolutePath());



        Iterator<ImageWriter> imageWriterIterator = ImageIO.getImageWritersByFormatName("TIF");

        ImageWriter writer = imageWriterIterator.next();

        imageOutputStream = ImageIO.createImageOutputStream(byteArrayOutputStream);

        writer.setOutput(imageOutputStream);



        ImageWriteParam param = writer.getDefaultWriteParam();

        param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);

        param.setCompressionType("JPEG");

        param.setCompressionQuality(0.1f);



        BufferedImage bufferedImage = ImageIO.read(input);

        writer.write(null, new IIOImage(bufferedImage, null, null), param);

        writer.dispose();

        return byteArrayOutputStream.toByteArray();



    } catch (Exception e) {



        throw new RuntimeException(e);

    } finally {

        if (imageOutputStream != null)

            imageOutputStream.close();

        byteArrayOutputStream.close();

    }

}

I want to reduce the size of output tiff as much as possible. Is there a better approach? Is it even possible to reduce the size of a tiff image?

return byteArrayOutputStream.toByteArray(); but you didn't wirite data to byteArrayOutputStream. Look, you just added data to writer.

About compression of tiff file, you have already done it with - param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);

Your byteArrayOutputStream object is getting closed in finally block before you converting byteArrayOutputStream to byteArray using byteArrayOutputStream.toByteArray() thats why you getting content length to be 0. So modify your code once as below :

public static byte compressJpgToTiff(File imageFile) throws Exception {

//Add rest of your method code here

writer.dispose();

byte bytesToReturn = byteArrayOutputStream.toByteArray();

return bytesToReturn;

} catch (Exception e) {

    throw new RuntimeException(e);

} finally {

    if (imageOutputStream != null)

        imageOutputStream.close();

    byteArrayOutputStream.close();

}

}