Compressing bilevel images by means of a three-bit chain code

Hermilo Sanchez-Cruz; Ramon M. Rodriguez-Dagnino

doi:10.1117/1.2052793

1 September 2005 Compressing bilevel images by means of a three-bit chain code

Hermilo Sanchez-Cruz, Ramon M. Rodriguez-Dagnino

Author Affiliations +

Optical Engineering, Vol. 44, Issue 9, 097004 (September 2005). https://doi.org/10.1117/1.2052793

Abstract

We propose a lossless compression method based on a chain code composed of only three symbols. The method is applicable to compress 2-D binary object shapes, and it consists of representing the orthogonal direction changes of the discrete contour, corresponding to each object binary shape, by three bits of a chain code. According to our experimental results, we find that this method is suitable for the representation of bilevel images. The results are about 25% more efficient in compression than the Freeman chain code method, and an average of 29% better than the Joint Bilevel Image Experts Group (JBIG) compressor.

©(2005) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Hermilo Sanchez-Cruz and Ramon M. Rodriguez-Dagnino "Compressing bilevel images by means of a three-bit chain code," Optical Engineering 44(9), 097004 (1 September 2005). https://doi.org/10.1117/1.2052793

Published: 1 September 2005

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