The Java ImageIO plugin for JBIG2 enables access to images encoded using the JBIG2 image compression standard. This component is part of the Apache PDFBox® project
The key features of the plugin are:
Please take a look at the release notes.
Support is available through the Apache PDFBox community
Please choose the appropriate section below, depending on whether you need to embed the ImageIO decoder inside your application (which would, for example, be the case if you want to support shared data segments) or you just want to add JBIG2 support to an existing ImageIO-enabled application.
Using the JBIG2 plugin with an existing application that already supports Java ImageIO is - at least in theory - very simple: just plunk the plugin jar down into your classpath and you're ready to go. What, exactly, you have to do to achieve this, depends on the application in question. Unfortunately, there is no general way to add the plugin to an application. Some general recommendations:
The JBIG2 ImageIO-Plugin is available from Maven Central.
To use the plugin within a Maven POM-based project, simply include a dependency to the following artifact in the appropriate
<dependency> <groupId>org.apache.pdfbox</groupId> <artifactId>jbig2-imageio</artifactId> <version>3.0.1</version> </dependency>
Several formats allow to embed JBIG2-compressed data in its own structure. PDF, for example, supports JBIG2-compressed data and adds the ability to embed shared data segments. Therefore the
JBIG2ImageReader can handle
JBIG2Globals which are stored separately and can be passed into the reader if neccessary via
The reader recognizes if the input data is headless and so embedded. This is assumed if the file header is missing.
You can also specify that the coming input data is embedded by using the special constructor in
ImageIO is able to scan the classpath for readers and writers. Call
ImageIO.scanForPlugins() if the reader is not seen. (Note: Thanks to George Sexton for this tip in context of using ImageIO within Apache Tomcat)