Using decision tree, particle swarm optimization, and support vector regression to design a median-type filter with a 2-level impulse detector for image enhancement

Authors:
Hung-Hsu Tsai;Bae-Muu Chang;Xuan-Ping Lin
Affiliations:
Department of Information Management, National Formosa University, Hu-Wei, Yun-Lin 632, Taiwan, ROC;Department of Information Management, Chienkuo Technology University, Chang-Hua, Chang-Hua 500, Taiwan, ROC;Department of Information Management, National Formosa University, Hu-Wei, Yun-Lin 632, Taiwan, ROC
Venue:
Information Sciences: an International Journal
Year:
2012

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Abstract

The paper presents a system using Decision tree, Particle swarm optimization, and Support vector regression to design a Median-type filter with a 2-level impulse detector for image enhancement, called DPSM filter. First, it employs a varying 2-level hybrid impulse noise detector (IND) to determine whether a pixel is contaminated by impulse noises or not. The 2-level IND is constructed by a decision tree (DT) which is built via combining 10 impulse noise detectors. Also, the particle swarm optimization (PSO) algorithm is exploited to optimize the DT. Subsequently, the DPSM filter utilizes the median-type filter with the support vector regression (MTSVR) to restore the corrupted pixels. Experimental results demonstrate that the DPSM filter achieves high performance for detecting and restoring impulse noises, and also outperforms the existing well-known methods under consideration in the paper.