Trace Ratio Criterion for Feature Extraction in Classification
Guoqi Li, Changyun Wen, Wei Wei, Yi Xu, Jie Ding, Guangshe Zhao, Luping Shi · Mathematical Problems in Engineering · 2014
A generalized linear discriminant analysis based on trace ratio criterion algorithm (GLDA‐TRA) is derived to extract features for classification. With the proposed GLDA‐TRA, a set of orthogonal features can be extracted in succession. Each newly extracted feature is the optimal feature that maximizes the trace ratio criterion function in the subspace orthogonal to the space spanned by the previous extracted features.