Singular value is a good characteristic of matrix.

奇异值是矩阵的一个良好特征。

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In training phase, singular value vector of a lot of face image information matrix from face image sets constitutes face image sets characteristic matrix as a column.

在训练阶段，从人脸图像集中选取大量人脸图像的信息矩阵的奇异值向量作为矩阵中的一列而构成的人脸图像集特征矩阵。

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We proved that each square quaternion matrix has at least one right characteristic principal value and its eigenvector, and a concrete solution was given.

证明了对每一个四元数矩阵，至少存在一个右特征主值，存在一个属于它的特征向量，并给出了具体的求解方法。

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