チェーン符号列により記述された大規模線図形の階層的符号化法

概要

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A hierarchical chain coding scheme is proposed for constructing large-scale line-drawing data base systems. The method transforms a line drawing image into a pyramid structure by uniting two links in each layer, and has the following features : 1) Arbitrary portions of a line drawing image can be retrieved in arbitrary resolution with a factor of 2. 2) Related portions of link code can be accessed in a short time. 3)Partitioning of link information into layers does not cause a significant increase in overhead code amount. In an experiment, a complicated coastline image was encoded in almost the same efficiency of Freeman's code, 3 bits/link.
社団法人映像情報メディア学会の論文