Some conceptions and the correspoinding equation is put forward, such as Euler vector, Euler orientation cosine matrix and Euler switch orientation cosine matrix.

提出了欧拉向量、欧拉方向余弦矩阵、欧拉基变换方向余弦矩阵等概念，并给出相应的公式。

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Optimization of feature selection, we select area, perimeter, long axis, short axis, Euler number, geometric moments, and a total of 12 feature parameters as input vector.

优化特征选择，选定面积、周长、长轴、短轴、欧拉数、几何矩等共12个特征参数作为神经网络输入向量进行分类试验。

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Optimization of feature selection, we select area, perimeter, long axis, short axis, Euler number, geometric moments, and a total of 12 feature parameters as input vector.

优化特征选择，选定面积、周长、长轴、短轴、欧拉数、几何矩等共12个特征参数作为神经网络输入向量进行分类试验。

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