CHAPTER 17 / LOSSLESS BILEVEL IMAGE COMPRESSION
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Table 17.1 Total Number of Bits in Compressed Lossless Representation of Bilevei Image
Test Sets (from [2])
Bilevel Images
Coder 9-200 dpi 9-300 dpi 4 mask
G3 (T.4) 647,348 1,344,030 125,814
G4 (T.6) 400,382 749,674 67,116
JBIG (T.82) 254,223 588,418 54,443
JBIG2 (T.88) 236,053 513,495 51,453
lossy compression of some parts of the bilevel images is allowed, then the JBIG2 representations
may be substantially further reduced in size.
17.5 REFERENCES
1. Sayood, K., 2000. Introduction to Data Compression, 2nd ed., Morgan-Kaufmann, San Mateo, CA.
2. Malvar, H. S., 2001. Fast adaptive encoder for bi-level images. Proceedings of the Data Compression
Conference, March 27-29, 2001, pp. 253-262.
3. ITU-T Recommendation T.82, 1993. Information TechnologymProgressive Bi-Level Image Compres-
sion, JBIG Recommendation.
4. ITU-T Recommendation T.88, 2000. Information TechnologymLossy/Lossless Coding Bi-Level
Images, JBIG2 Recommendation.
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