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The Use of Graphs for Coding the Spatial Distribution of Visual Words and their use for Searching and Classification of Images in Large Collections

Grant number: 12/16172-2
Support type:Scholarships in Brazil - Master
Effective date (Start): February 01, 2013
Effective date (End): April 21, 2014
Field of knowledge:Physical Sciences and Mathematics - Computer Science - Computing Methodologies and Techniques
Principal researcher:Ricardo da Silva Torres
Grantee:Fernanda Brandão Silva
Home Institution: Instituto de Computação (IC). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Associated scholarship(s):13/11378-4 - Applying bag of visual graphs approach for symbol spotting, BE.EP.MS


Nowadays, the large volume of multimedia data available motivates the study of techniques for manipulation and indexing of images and videos. In this context, the goal of this research project is to investigate the use of visual dictionaries in order to characterize the visual properties of images in applications related to Information Retrieval and Multimedia Classification. The method based on visual dictionaries appears as one of the most popular techniques to describe images. However, this approach does not consider any spatial information to describe images and objects. The purpose of this project is to obtain a description semantically richer of the image visual content using graphs to incorporate the spatial distribution of visual words to the visual dictionary model. This use of graphs is motivated by the invariant behavior of these structures under various transformations of objects and images, such as rotation, translation.The contributions of this project fit into the context of one of the Great Challenges in Computing of SBC: Information Management in Large Volumes of Distributed Multimedia Data.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SILVA, FERNANDA B.; WERNECK, RAFAEL DE O.; GOLDENSTEIN, SIOME; TABBONE, SALVATORE; TORRES, RICARDO DA S. Graph-based bag-of-words for classification. PATTERN RECOGNITION, v. 74, p. 266-285, FEB 2018. Web of Science Citations: 16.
PENATTI, OTAVIO A. B.; SILVA, FERNANDA B.; VALLE, EDUARDO; GOUET-BRUNET, VALERIE; TORRES, RICARDO DA S. Visual word spatial arrangement for image retrieval and classification. PATTERN RECOGNITION, v. 47, n. 2, p. 705-720, FEB 2014. Web of Science Citations: 50.
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
. Sacola de grafos : definição, implementação e validação em tarefas de classificação. 2014. Master's Dissertation - Universidade Estadual de Campinas (UNICAMP). Instituto de Computação.

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