Generalized subspace based high dimensional density estimation
Abstract
Our paper presents a novel high dimensional probability density
estimation technique using any dimensionality reduction method. Our
method first performs subspace reduction using any matrix
factorization algorithm and estimates the density in the
low-dimensional space using sample-point variable bandwidth kernel
density estimation. Subsequently, the high dimensional density is
approximated from the low dimensional density parameters. The
reconstruction error due to dimensionality reduction process is also
modeled in a principled and efficient manner to obtain the high
dimensional density estimate. We show the effectiveness of our
technique by using two popular dimensionality reduction tools,
principal component analysis and non-negative matrix factorization.
This technique is applied to AT&T, Yale, Pointing'04 and CMU-PIE face
recognition datasets and improved performance compared to other
dimensionality reduction and density estimation algorithms is
obtained.
International Conference on Image Processing, Brussels, Belgium, Sep. 2011.
Node ID: 568 ,
DB ID: 377 ,
Lab: VRL ,
Target: Proceedings
Subject: [IPL] « Look up more