JBIG2.com :: An Introduction to JBIG2

Review and Summary

JBIG2 compression can make a tremendous difference in a company's ability to effectively transmit, process, web-host, and email scanned documents. A compression factor of 5x-10x can typically be expected. When JBIG2 is mapped to PDF format, there are some additional advantages over storing image documents in TIFF format, like a searchable text layer, web-optimization, and security. For JBIG2 conversion to be reliable, the quality of the JBIG2 encoder is paramount. Any reliable JBIG2 encoder must support perceptually lossless image conversion.

Not specifying the encoding method for JBIG2 means there is considerable latitude for a JBIG2 design & implementation team to qualitatively differentiate one JBIG2 encoder from another. Among the differentiating factors in a JBIG2 implementation are:

  • Compressed file size
  • Image quality
  • Supported JBIG2 modes
  • Speed of the encoder & decoder
  • Speed to display a page in a file
  • Speed to print a file

JBIG2 specifications provide a framework which enables great compression savings when used properly. The best manner to take advantage of it is an area of ongoing research. As a result, the difference in file size between different JBIG2 implementations can vary drastically.

Selecting the right JBIG2 software, then, is crucial to truly optimize the possibilities of the format. Any business wishing to maximize the advantages of compression through speed, accuracy, and image quality is well served to go through due diligence to choose the software best suited to its specific objectives for JBIG2 implementation.