Filling algorithm of the complex connecting area is studied and a new scan line algorithm for filling area is presented.

对复连通区域填充算法进行了细致的研究，提出一种新的扫描线填充算法。

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Compared with the scan line algorithm, it has a simple data structure, no need to maintain and sort lots of tables, simple implementation, and fitting for being implemented by hardware.

该算法和扫描线算法相比，具有数据结构简单，不需要对众多的表格进行维护和排序，实现思想简洁和适合硬化等优点。

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However, this algorithm does not apply for circular orbit cone-beam scan with line-focus X-ray source.

但是，这种算法不能满足线X射线源圆轨道锥束扫描的情况。

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