For lowering the complexity of computing the sharp angle, a new method based on boundary chain code is introduced.

为降低计算火焰尖角的复杂度，提出一种新的基于边界链码的计算火焰尖角的方法；

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An algorithm is presented for converting the linear quadtree representation of a simply connected region into a 4-direction chain code description of the region's boundary.

本文提出一种算法实现单连通区域的线性四元树表示转换成区域边界的4 -方向链码描述。

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The boundary of the area of interest is located by using chain code method and precise boundary tracking method with a computer vision system.

首先用计算机图象处理系统将材料截面图形数字化，并采用链码方法和精确边界寻迹方法确定图形边界。

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