jbig2dec (a JBIG2 decoder)

jbig2dec is a decoder implementation of the JBIG2 image compression
format.

JBIG2 is designed for lossy or lossless encoding of 'bilevel' (1-bit
monochrome) images at moderately high resolution, and in particular
scanned paper documents. In this domain it is very efficient, offering
compression ratios on the order of 100:1.
