It is very necessary to extract spectrum feature and compress spectral data, that is, a large spectrum dataset can be represented by the linear combination of some eigenvectors.
所以，对光谱数据进行特征提取、实现数据压缩是非常必要的，即将一个大光谱数据集表示为几个特征矢量的线性组合。
A feature filter is presented to extract linear points and their relations from input samples.
采用特征滤波器来提取样本集中具有线性特征的点，同时生产样本点之间的相互关系；
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