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- Title
A FWCL-based method for visual vocabulary formation.
- Authors
Zhang, Sulan; Zhang, Jifu; Guo, Ping; Chu, Meng; Chang, Kai
- Abstract
Traditional BOV (bag-of-visterms) constructing methods ignore different visual words' contributions to image representation. Moreover, the size of visual vocabulary is generally set according to experience. Frequent weighted concept lattice (FWCL) is an interesting version of the concept lattice, and helps realize knowledge extraction in a more efficient way. In this paper, we present a dynamic refinement method for visual vocabulary formation based on frequency weighted concept lattice (FWCL) by using its characteristic of hierarchical data analysis and reduction. The original visual words' weight value is assigned with information entropy, and FWCLs of each semantic category are constructed. According to the extent thresholds, each category of visual vocabulary is built and combined to generate the reduced global visual vocabulary for image representation. By adjusting the extent thresholds, different sizes of reduced visual vocabularies are dynamically extracted from this type of hierarchical structure. Lastly, experiments are carried on the two commonly used datasets, and experimental results show the effectiveness of our method on the scene classification.
- Subjects
LATTICE dynamics; HIERARCHICAL clustering (Cluster analysis); ENTROPY; CLASSIFICATION; IMAGE analysis; MATHEMATICAL models; COMPUTER network resources
- Publication
Multimedia Tools & Applications, 2016, Vol 75, Issue 1, p647
- ISSN
1380-7501
- Publication type
Article
- DOI
10.1007/s11042-014-2313-7