The method can directly extract arc.The binary image is encoded with black horizontal runlength.A stripe region consists of correlative runlengths with the same width and topology.
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- 对二值图象作水平黑游程编码,相关游程基于线宽与拓扑的一致性构成条形域,对其中多义域进行分裂得单义域(线段域和圆弧域)。