New block coding method for bilevel images

George R. Robertson; Maurice F. Aburdene; Richard J. Kozick

doi:10.1117/12.204134

3 March 1995 New block coding method for bilevel images

George R. Robertson, Maurice F. Aburdene, Richard J. Kozick

Proceedings Volume 2418, Still-Image Compression; (1995) https://doi.org/10.1117/12.204134
Event: IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, 1995, San Jose, CA, United States

Abstract

A new block coding technique for the compression of bilevel text images is presented. The technique uses a combination of pre-processing the image to extract the edge information and block coding to compress the data. The key feature of the technique is simplicity in implementation. The pre-processing consists of an image differencing operation to decorrelate the strings of black pixels. The decorrelation is followed by the lossless coding of each block of the image. The performance of the new image differencing method is examined based on both theoretical and experimental code length data. Both theoretical and simulation results show that by pre-processing the image, the number of nonzero pixels can be significantly reduced and a more efficient block code is realized.

Citation Download Citation

George R. Robertson, Maurice F. Aburdene, and Richard J. Kozick "New block coding method for bilevel images", Proc. SPIE 2418, Still-Image Compression, (3 March 1995); https://doi.org/10.1117/12.204134

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