提出用离散曲率法提取特征点，曲率表达式包含了高斯核函数曲线，选用了合适的离散尺度因子。

The discrete curvature arithmetic was used to extract feature points, which the curvature expression contains Gaussian nuclear function and chooses appropriate discrete scale factor.

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在特征集的基础上，讨论了其参数导数的构成情况，用有限个点和函数表示了无穷个参数导数的情形。

Based on characteristic set, the case of infinity parameters is described by using of finite value and functions.

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采用优先权控制函数控制模型特征，且可以实现点和边的同步处理。

In order to control the model features in the process of metamorphosis, the priority control function is used to handle both vertex and edge at the same time.

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