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 ch...
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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 objectbinary 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. (c) 2005 society of Photo-Optical Instrumentation Engineers.
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