期刊
PATTERN RECOGNITION
卷 38, 期 4, 页码 553-557出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.patcog.2004.08.017
关键词
pattern recognition; chain code; Huffman code; object representations; chain code compression
This paper presents a new chain code based on the eight-direction Freeman code. Each element in the chain is coded as a relative angle difference between it and the previous element. Statistical analysis showed that the probabilities of the Freeman codes differ importantly. Therefore, the Huffman coding was applied. The proposed chain code requires 1.97 bits/code, its chain length is short, it allows the representation of non-closed patterns and it is rotationally independent. (C) 2004 Pattern Recognition Society. Published by Elsevier Ltd. All rights reserved.
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