NDLI: A structurally motivated framework for discriminant analysis

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A structurally motivated framework for discriminant analysis

Content Provider	Springer Nature Link
Author	Yang, Bo Chen, Songcan Wu, Xindong
Copyright Year	2011
Abstract	Over the last few years, a lot of algorithms for discriminant analysis (DA) have been developed. Although having different motivations, they all inject structure information in data into their own within- and between-class scatters. However, to our best knowledge, there has not been yet a systematical examination about (1) which structure granularities lurk in data; (2) which structure granularities are utilized in scatters of a DA algorithm; (3) whether new DA algorithms can be developed based on existing structure granularities. In this paper, the established so-called structurally motivated (SM) framework for DA and its unified mathematical formulation of the ratio trace exactly answers them. It categorizes these DA algorithms from the viewpoint of constructing scatters based on different-granularity structures in data, identifies their applicable scenarios for different structure types, and provides insights into developing new DA algorithms. Inspired by the insight, we find that cluster granularity lying in the middle of granularity spectrum in SM framework can still be further utilized and exploited. As a result, the three DA algorithms based on the cluster granularity are derived from the SM framework and from the injection of the cluster structure information into the respective within-class, between-class and joint both scatter matrices for the classical MDA, and these corresponding algorithms are, respectively, called as SWDA, SBDA and SWBDA. The injection of cluster structure information makes the proposed three algorithms able to fit relatively complicated data not only more effectively, but also with the regularization technique obtain more projections than the classical MDA, which is very helpful for more effective DA. Moreover, MDA becomes their special case when the cluster numbers of all classes are set to 1. Our experiments on the benchmarks (face and UCI databases) here show that the proposed algorithms yield encouraging results.
Starting Page	349
Ending Page	367
Page Count	19
File Format	PDF
ISSN	14337541
Journal	Pattern Analysis & Applications
Volume Number	14
Issue Number	4
e-ISSN	1433755X
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-07-08
Publisher Place	London
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discriminant analysis Structure granularity Framework Scatter matrix Classification Pattern Recognition
Content Type	Text
Resource Type	Article
Subject	Artificial Intelligence Computer Vision and Pattern Recognition

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
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