关键词: 主成分分析, 核主成分分析, 概率主成分分析, 亮点检测, 概率核主成分分析

Abstract: The PCA，Kernel PCA（KPCA） and Probabilistic PCA（PPCA） are popular feature extraction methods.This paper proposes a method to detect bright spots on LCD screen using Probabilistic Kernel Principal Component Analysis（PKPCA）.PKPCA is considered a relatively new extraction technique which is a nonlinear extension of a PPCA.It illustrates the potential of PKPCA on detection compared with PCA and PPCA algorithms.The experiments indicate that PKPCA is superior to the PCA and PPCA in some aspects.

Key words: Principal Component Analysis（PCA）, Kernel Principle Component Analysis（KPCA）, Probabilistic Principal Component Analysis（PPCA）, bright spot detection, Probabilistic Kernel Principal Component Analysis（PKPCA）