NDLI: Dynamic weighted discrimination power analysis in DCT domain for face and palmprint recognition

Content Provider	IEEE Xplore Digital Library
Author	Lu Leng Jiashu Zhang Jing Xu Khan, M.K. Alghathbar, K.
Copyright Year	2010
Description	Author affiliation: Center of Excellence in Information Assurance, King Saud University, Riyadh, Saudi Arabia (Khan, M.K.; Alghathbar, K.) \|\| Sichuan Province Key Lab of Signal and Information Processing, Southwest Jiaotong University, Chengdu, China (Lu Leng; Jiashu Zhang; Jing Xu)
Abstract	Discrimination power analysis (DPA) is a statistical analysis combining discrimination concept with discrete cosine transform coefficients (DCTCs) properties. Unfortunately there is not a uniform and effective criterion to optimize the shape and size of premasking window on which the effect of DPA excessively relies. Proper premasking is an auxiliary process to select the feature coefficients that have more discrimination power (DP). Dynamic weighted DPA (DWDPA) is proposed in this paper to enhance the DP of the selected DCTCs without premasking window, in other words, it does not need to optimize the shape and size of premasking window. The DCTCs are adaptively selected according to their discrimination power values (DPVs). More DCTCs with higher DP are preserved. The selected coefficients are normalized and dynamic weighted according to their DPVs. Normalization assures that the DCTCs with large absolute value don't destroy the DP of the other DCTCs that have less absolute value but high DPVs. Dynamic weighting gives larger weights to the DCTCs with larger DPVs which optimizes and enhances the recognition performance. The experimental results on ORL, Yale and PolyU databases show that DWDPA outperforms DPA obviously.
Starting Page	467
Ending Page	471
File Size	369970
Page Count	5
File Format	PDF
ISBN	9781424498062
e-ISBN	9781424498086
DOI	10.1109/ICTC.2010.5674791
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-11-17
Publisher Place	Korea (South)
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Training Databases Shape Palmprint recognition Face recognition Discrete cosine transform (DCT) Lighting Feature extraction Discrete cosine transforms Coefficient selection Dynamic weighted discrimination power analysis (DWDPA)
Content Type	Text
Resource Type	Article

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