within class scatter matrix 中文意思是什麼
within class scatter matrix
解釋
類內離散度矩陣-
( 2 ) a series of new methods of feature extraction based on the optimal discriminant analysis are proposed, including the new lda algorithm based on the spectral decomposition of within - class scatter matrix sw which is effective when the number of class is small, an improved algorithm of optimal set of discriminant vectors based on the svd which is effective for face recognition, and the kernel fisher discriminant method ( kfdm ). experimental results on orl show that the kfdm outperforms conventional fisher discriminant methods in face recognition, however the computational load is much higher than those of conventional algorithms
( 2 )提出了基於最優鑒別分析的圖象特徵抽取的一系列新方法,它們包括:基於對類內矩陣s _ w進行譜分解的f - s最優鑒別矢量集方法,該方法在類別數比較小時非常有效;一種改進的基於svd的最優鑒別矢量求解演算法,將該方法用於人臉識別時有較好的性能;非線性最優鑒別矢量集方法,該方法雖然有效,但計算時間較長。
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