前言： 分形理论是分析和研究自然界中具有“自相似性”、“自仿射性”不规则形体的重要手段。

The fractal theory provides an important method in study of irregular objects of self-similarity and self-affinity.

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建立仿射不变的形状相似性度量是模式识别、计算机视觉和图象理解领域中的基本问题之一。

Establishing affine invariant similarity measure of shapes is one of the basic problems in pattern recognition, computer vision and image understanding domains.

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通过分析小波分解作为分形图像编码预分解的有效性和小波域内仿射变换的特性，提出一种基于分类的小波域内的分形图像编码方法。

With analyzing the availability of fractal image coding and the characters of affine transform in wavelet domain, a fractal image coding approach based on classifications is presented in this paper.

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