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arXiv 0908.2724stat.MLstat.ME
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稀疏典型相关分析

Sparse Canonical Correlation Analysis

David R. Hardoon, John Shawe-Taylor

摘要:

提出了一种新的稀疏凸框架下的典型相关分析(CCA)的最小二乘法求解方法。所提出的方法侧重于当人们对第一视图的原始表示感兴趣(或限于)而对第二视图具有双重表示时的场景。稀疏CCA(SCCA)最大限度地减少了原始和双重投影中使用的特征数量,同时最大限度地提高了两个视图之间的相关性。该方法被证明在两个配对语料库的英语-法语和英语-西班牙语的配偶检索。我们能够观察到,在mate-retreival,当原始特征的数量是大的SCCA优于核CCA(KCCA),从稀疏的特征集学习共同的语义空间。

英文摘要:

We present a novel method for solving Canonical Correlation Analysis (CCA) in a sparse convex framework using a least squares approach. The presented method focuses on the scenario when one is interested in (or limited to) a primal representation for the first view while having a dual representation for the second view. Sparse CCA (SCCA) minimises the number of features used in both the primal and dual projections while maximising the correlation between the two views. The method is demonstrated on two paired corpuses of English-French and English-Spanish for mate-retrieval. We are able to observe, in the mate-retreival, that when the number of the original features is large SCCA outperforms Kernel CCA (KCCA), learning the common semantic space from a sparse set of features.

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