Multi-scale discriminant saliency with wavelet-based Hidden Markov Tree modelling

Anh Cat Le Ngo, Kenneth Li-Minn Ang, Jasmine Kah-Phooi Seng, Guoping Qiu

Research output: Contribution to journalArticle

Abstract

Supposed saliency is a binary classification between centre and surround classes, saliency value is measured as their discriminant power. As the features are defined by sizes of chosen windows, a saliency value at each location is varied accordingly. This paper proposes computing saliency as discriminant power in multiple dyadic scales of Wavelet Hidden Markov Tree (HMT), in which two consecutive dyadic scales provide surrounding and central features, organized in a quad-tree structure. Their discriminant power is estimated as maximum a posterior probability (MAP) by Expectation-Maximization (EM) iterations. Then, a final saliency value is the maximum discriminant power generated among these scales. Standard quantitative tools and qualitative assessments are used for evaluating the proposed multi-scale discriminant saliency (MDIS) against the well-know information based approach AIM on its image collection with eye-tracking data. Simulation results are presented and analysed to verify the validity of MDIS as well as point out its limitation for further research direction.
Original languageEnglish
Pages (from-to)1376-1389
Number of pages14
JournalComputers and Electrical Engineering
Volume40
Issue number4
Early online dateMar 2014
DOIs
Publication statusPublished - May 2014

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