Each point is used to generate a feature vector that describes the local image region sampled relative to its scale-space coordinate frame.

每一个点产生一个特征向量来描述关于其尺度空间坐标系的局部区域采样。

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The numerical precision and formulation efficiency of multibody system dynamics directly depend on the choosing the local frame coordinates and global coordinate, and on the formulation methods.

流形上动力学方程的建立与全局坐标和局部坐标的选择，以及建模方法有着直接的联系，决定着动力学模型的建模效率和数值运算精度。

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