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

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。

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Interpolation on gray images is needed in the course of geometric operation. Bilinear interpolation algorithm is effective, but its program is complex and the running time is longer.

几何运算要求对图像进行灰度值插值，双线性算法可产生令人满意的效果，但是程序较复杂，运行时间较长。

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In this algorithm, many basic geometric transformations of digital images are unified. These transformations include scaling, rotating, shearing, flipping, and mirroring, etc.

用这个算法可以处理的图像几何变换包括：图像旋转，图像变倍，图像剪切，以及图像翻转，镜像变换等。

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