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 can be very efficient, offering compression ratios on the order of 100:1. This is a decoder only implementation, and its primary use is in Ghostscript and MuPDF for decoding JBIG2 streams in PDF files. Thus its primary focus is the set of JBIG2 features supported in PDF.
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 can be very efficient, offering compression ratios on the order of 100:1. This is a decoder only implementation, and its primary use is in Ghostscript and MuPDF for decoding JBIG2 streams in PDF files. Thus its primary focus is the set of JBIG2 features supported in PDF.
To install jbig2dec, run the following command in macOS terminal (Applications->Utilities->Terminal)
sudo port install jbig2dec
To see what files were installed by jbig2dec, run:
port contents jbig2dec
To later upgrade jbig2dec, run:
sudo port selfupdate && sudo port upgrade jbig2dec
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