pca test 中文意思是什麼
pca test
解釋
被動皮膚過敏試驗-
The pca results indicated that the characteristics of length, breadth, the angle of leaf basal in lamina and the characteristics of calyx - tube, corolla dimension and inflorescence pedicel in the flower were the main reasons leading to the morphological variations, and the f - test of single factor variance analysis verified the conclusion
主成分分析顯示，葉部特徵的長度、寬度、葉基夾角等，以及花部特徵的花獸筒、花冠幅、花序總梗等是造成不同居群野生早櫻表型差異的主要因素，單因素方差分析也印證了這一結論。 -
In training process, we use kernel - based fisher discrimination analysis ( kfda ) method to train the input sample vectors. the method has been used in face recognition and has been demonstrated better recognition capability than other methods ( pca, kpca, svm ). we calculate the optimal subspace wopt and project the sample gait sequences to wopt, then get the tracks of the sequences, calculate the track centroid and calculate the exemplar projection centroid of the sequences in the same class, and the exemplar projection centroid represents the class template. to test the class of a gait sequence, we also project the test sequence to the eigenspace, and calculate the track centroid, then calculate the euclidean distance of the test sequence tracking centroid with the sample sequences ’ exemplar projection centroids. and the class which the test sequence belongs to is the one that the sample sequence which the euclidean distance is shortest belongs to
該方法在人臉識別的研究中已有採用並在同樣測試條件下取得比其他識別方法更好的識別性能。採用kfda方法取得最優特徵空間wopt ，把步態樣本序列映射到wopt中，取得樣本序列在特徵空間中的軌跡，計算軌跡質心，把同類樣本序列的軌跡質心進行平均求得該類的標本投影軌跡質心，作為該類的模板。在識別時，將測試序列也投影到特徵空間中，取得序列軌跡質心，對測試序列軌跡質心與樣本的標本投影軌跡質心計算它們的歐氏距離。
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