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arXiv 1601.01431cs.CV
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混合双向投影二维的概率主成分分析

Mixture of Bilateral-Projection Two-dimensional Probabilistic Principal Component Analysis

Beijing University of Technology(北京工业大学);Charles Sturt University(查尔斯特大学)

Fujiao Ju, Yanfeng Sun, Junbin Gao, Simeng Liu, Yongli Hu

摘要:

概率主成分分析(PPCA)是建立在一个全球性的线性映射,它是不足以模拟复杂的数据变化。提出了一种基于二维数据的混合双边投影概率主成分分析模型(mixB2DPPCA)。该模型是一种软聚类算法,具有对复杂结构数据建模的能力。提出了一种基于变分EM(期望最大化)方法学习模型参数的贝叶斯推理方案。在一些公开数据库上的实验表明,mixB2DPPCA的性能得到了很大的提高,与现有的PCA算法相比,其重构误差和识别率都有了更高的精度。

英文摘要:

The probabilistic principal component analysis (PPCA) is built upon a global linear mapping, with which it is insufficient to model complex data variation. This paper proposes a mixture of bilateral-projection probabilistic principal component analysis model (mixB2DPPCA) on 2D data. With multi-components in the mixture, this model can be seen as a soft cluster algorithm and has capability of modeling data with complex structures. A Bayesian inference scheme has been proposed based on the variational EM (Expectation-Maximization) approach for learning model parameters. Experiments on some publicly available databases show that the performance of mixB2DPPCA has been largely improved, resulting in more accurate reconstruction errors and recognition rates than the existing PCA-based algorithms.

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