A Report on Multilinear PCA Plus Multilinear LDA to Deal with Tensorial Data: Visual Classification as An Example
This work addresses the curse of dimensionality in visual classification for tensorial data, but it is incremental as it combines existing multilinear techniques.
The paper tackles the problem of high-order tensorial data representation and recognition by proposing Generalized Discriminant Analysis (GDA), which merges multilinear PCA and multilinear LDA, and demonstrates that GDA outperforms competing methods like (2D)^2PCA, (2D)^2LDA, and MDA in experiments.
In practical applications, we often have to deal with high order data, such as a grayscale image and a video sequence are intrinsically 2nd-order tensor and 3rd-order tensor, respectively. For doing clustering or classification of these high order data, it is a conventional way to vectorize these data before hand, as PCA or FDA does, which often induce the curse of dimensionality problem. For this reason, experts have developed many methods to deal with the tensorial data, such as multilinear PCA, multilinear LDA, and so on. In this paper, we still address the problem of high order data representation and recognition, and propose to study the result of merging multilinear PCA and multilinear LDA into one scenario, we name it \textbf{GDA} for the abbreviation of Generalized Discriminant Analysis. To evaluate GDA, we perform a series of experiments, and the experimental results demonstrate our GDA outperforms a selection of competing methods such (2D)$^2$PCA, (2D)$^2$LDA, and MDA.