首先 ，提出了镜头质心特征向量的概念 ，减少了关键帧特征的存储量 。

First, it advances the centroid feature vector of shot in order to reduce the storage of video database.

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文章提出了决策表的区分向量的概念，并给出了利用区分向量进行属性约简的方法。

This paper proposes the concept of the decision table of the attributes reduction, and gives the method of the reducing attributes based on discernibly vector.

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这里我们并没有曲面定向的概念，能做的就是，从两个法向量中选出一个作为正方向。

Here we don't have a notion of orienting the surface other than by precisely choosing one of the two possible normal vectors.

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