How to Read JPEG 2000 in Java (Tutorial)

In this article, I will talk you through how to read JPEG 2000 images into a BufferedImage in Java. We also have a related article covering how to write JPEG 2000 files in Java.

ImageIO provides support for JPEG 2000 using JJ2000 (originally written around 2000). It produces poor results with a lot of our sample images (black spots on white images) and is not complete. It only supports the jpx subtype. So we felt it was time to add a modern implementation to JDeli with full support for the format.

How to read a JPEG 2000 image in Java with ImageIO

1. Create a File, InputStream, or URL pointing to the raw JPEG 2000 image.
2. ImageIO will now be able to read a JPEG 2000 file into a BufferedImage.

and the Java code to read JPEG 2000 with ImageIO…

File file = new File("/path/to/image.jpx");

BufferedImage image = ImageIO.read(file);

How to read a JPEG 2000 image in Java with JDeli

1. Add JDeli to your class or module path. (download the trial jar).
2. Create a File, InputStream pointing to the raw JPEG 2000 image. You can also use a byte[] containing the image data.
3. Read the JPEG 2000 image into a BufferedImage

and the Java code to read JPEG 2000 with JDeli…

File file = new File("/path/to/image.jpx");

BufferedImage image = JDeli.read(file);

// Read an image
BufferedImage bufferedImage = JDeli.read(dicomImageFile);

// Read an image
BufferedImage bufferedImage = JDeli.read(heicImageFile);

// Write an image
JDeli.write(bufferedImage, "heic", outputStreamOrFile);

// Read an image
BufferedImage bufferedImage = JDeli.read(jpegImageFile);

// Write an image
JDeli.write(bufferedImage, "jpeg", outputStreamOrFile);

// Read an image
BufferedImage bufferedImage = JDeli.read(jpeg2000ImageFile);

// Write an image
JDeli.write(bufferedImage, "jpx", outputStreamOrFile);

// Write an image
JDeli.write(bufferedImage, "pdf", outputStreamOrFile);

// Read an image
BufferedImage bufferedImage = JDeli.read(pngImageFile);

// Write an image
JDeli.write(bufferedImage, "png", outputStreamOrFile);

// Read an image
BufferedImage bufferedImage = JDeli.read(tiffImageFile);

// Write an image
JDeli.write(bufferedImage, "tiff", outputStreamOrFile);

// Read an image
BufferedImage bufferedImage = JDeli.read(webpImageFile);

// Write an image
JDeli.write(bufferedImage, "webp", outputStreamOrFile);