Graduate School and Research Center in Digital Sciences

Fitting gaussian copulae for efficient visual codebooks generation

Redi, Miriam; Merialdo, Bernard

CBMI 2012, 10th Workshop on Content-Based Multimedia Indexing, June 27-29, 2012, Annecy, France

The Bag of Words model is probably one of the most effective ways to represent images based on the aggregation of locally extracted descriptors. It uses clustering techniques to build visual dictionaries that map each image into a fixed length signature. Despite its effectiveness, one major drawback of this model is the codebook informativeness and its computational complexity. In this paper we propose Copula-BoW (C-BoW), namely an efficient local feature aggregator inspired by the Copula theory. In C-BoW, we build in a quadratic time an efficient codebook for vector quantization, based on the correlation of the marginal distributions of the local features. Our experimental results prove that the C-BoW signature is much more efficient and as discriminative as traditional BoW for scene recognition and video retrieval (TRECVID [14] data). Moreover, we also show that our new model provides complementary information when combined to existing local features aggregators, substantially improving the final retrieval performance.

Document Doi Bibtex

Title:Fitting gaussian copulae for efficient visual codebooks generation
Type:Conference
Language:English
City:Annecy
Country:FRANCE
Date:
Department:Data Science
Eurecom ref:3744
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Bibtex: @inproceedings{EURECOM+3744, doi = {http://dx.doi.org/10.1109/CBMI.2012.6269794}, year = {2012}, title = {{F}itting gaussian copulae for efficient visual codebooks generation}, author = {{R}edi, {M}iriam and {M}erialdo, {B}ernard}, booktitle = {{CBMI} 2012, 10th {W}orkshop on {C}ontent-{B}ased {M}ultimedia {I}ndexing, {J}une 27-29, 2012, {A}nnecy, {F}rance}, address = {{A}nnecy, {FRANCE}}, month = {06}, url = {http://www.eurecom.fr/publication/3744} }
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