JBIG2 is an image compression standard for bi-level images, developed by the Joint Bi-level Image Experts Group. It is suitable for both lossless and lossy compression.
JBIG2
Today, we are excited to announce JDeli – a brand new image library for Java which is free for you to download and evaluate from... The PDF file format allows you to use many forms of compression in a PDF file. Many of these (JPEG, LZW, etc) are built... JBIG2 Compression in PDF Explained: There is a really good article explaining what JBIG2 compression does and why it is a good thing written... 
