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Context-based, Adaptive, Lossless Image Codec

Summary

An encoding/decoding method is provided for lossless compression of digital pictures of all types, including continuous-tone images, graphics, multimedia images of mixed text, graphics and photographs binary documents and drawings. Continuous-tone mode and binary mode are identified on a pixel-by-pixel basis. In continuous-tone mode, context modeling and prediction are employed involving mostly integer arithmetic and simple logic in a conceptually sophisticated scheme. Both the encoding and decoding techniques are suitable for sequential and progressive transmission, although different specific algorithms may be employed for the different specific cases.

1

Application No.

95/ENG/009 Inventor: Professor Xiaolin WU, Department of Information Engineering Patent Status: US Patent no. 5,903,676

Country/Region

Hong Kong

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