How to Read JPEG 2000 in Java

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. So we felt it was time to add a modern implementation to JDeli using Java8.

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. This syntax is like so:

   BufferedImage image = ImageIO.read(jpeg2000FileOrInputStreamOrURL)

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

   BufferedImage image = JDeli.read(jpeg2000File);

Why do developers choose JDeli over free alternatives?

1. Works with newer image formats such as AVIF, HEIC, JPEG XL, WEBP (AVIF next release) that are not supported in Java.
2. Better support than alternatives for JPEG, PNG, TIFF.
3. Process images up to 3x faster than ImageIO and other Java image libraries.
4. Prevent JVM crashes caused by native code in other image libraries such as ImageIO.
5. Image security as JDeli processes images on your servers with no calls to any external system or third party library.

// 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);