针对二值图像的几何相似性，本文提出一种基于等腰直角三角形的压缩算法。

We put forward an compression algorithm based on isosceles right triangle according to the geometric similarity of binary images.

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对于网格模型简化问题，本文提出了一种基于网格顶点曲率加权该顶点邻接三角形面积的顶点删除简化算法。

This algorithm removes vertices of the mesh according to the curvature of the vertex weighted by the area of the triangles which are adjacent to that vertex.

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同时提出了快速定位三角形的直线方向定位算法，该算法与一般方向定位算法相比，具有搜索路径唯一，运行稳健的特点。

Furthermore, the paper presents a line oriented locating algorithm for fast locating triangles, which has the advantage of unique path and steady operation compared with other locating algorithms.

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