Java JPEG2000 Writer
Java’s built-in ImageIO does not support writing JPEG2000 files. JDeli is a 100% Java JPEG2000 writer that provides full encoding control with no dependencies.
Getting started
Add JDeli to your project via Maven or Gradle, or see using JDeli with Java modules.
Key features:
- 100% Java solution. No dlls or dependencies on native code
- Fast and easy to use
- Lossless and lossy supported
- JP2 or JPX output format
- Supports image compression settings
Quick start or to replace in existing code using ImageIO:
JDeli.write(myBufferedImage, "jpx", outputStreamOrFile);
or
byte[] outputData = JDeli.write(myBufferedImage, "jpx");
Simple usage
JDeli.write(myBufferedImage, OutputFormat.JPEG2000, outputStreamOrFile);
OutputFormat allows setting of any supported Image Format
For complete control of output:
final Jpeg2000EncoderOptions options = new Jpeg2000EncoderOptions();
//set any options in options instance - examples below
options.setOutputSubtype(Jpeg2000OutputSubtype.JP2);
// or options.setOutputSubtype(Jpeg2000OutputSubtype.JPX);
options.setQuality(100);//0-100
//write out
JDeli.write(myBufferedImage, options, outputStreamOrFile);
Jpeg2000EncoderOptions allows setting of specific options.
Various image processing operations can be conducted on the image, detailed documentation can be found here.
Performance comparisons:
These figures were generated using jmh (as documented on our blog) with a standard set of images (also documented). They should be easy to replicate if you wish to validate, the code is on GitHub.
The higher the number, the better.
Mode: Throughput Count: 25 Units: ops/s
| Benchmark | Score | Error |
|---|---|---|
| ImageIOWithJAI | 2.306 | ± 0.007 |
| JDeli_JP2 | 6.226 | ± 0.023 |
| JDeli_JPX | 6.228 | ± 0.020 |
Number of files: 166
| Benchmark | Size | unreadable output | AVG SSIM score | AVG Similarity |
|---|---|---|---|---|
| ImageIOWithJAI | 1,419.60KB | 0 | 0.9659635878077559 | Very similar (high quality) |
| JDeli JP2 | 288.66KB | 0 | 0.8817187006016771 | Similar (noticeable but minor differences) |
| JDeli JPX | 277.31KB | 0 | 0.8817187006016771 | Similar (noticeable but minor differences) |
Tested on 2020 13inch M1 MacBook Pro using JDK 18.0.1.1
Frequently asked questions
Can Java write JPEG2000 files natively?
No. Java’s built-in ImageIO does not support writing JPEG2000 files. JDeli provides a pure-Java JPEG2000 encoder with no dependencies required.
Does writing JPEG2000 in Java require native libraries?
No. JDeli is a 100% Java library with no dependencies. It runs on any platform where the JVM runs with no additional installation.
What output types does JDeli support for writing JPEG2000?
JDeli can write JPEG2000 to a File, OutputStream, or return the encoded data as a byte array.