On the evaluation of cost functions for parameter optimization of a multiscale shape descriptor

Detalhes bibliográficos
Autor(a) principal: Souza, Marcelo Marques Simões de
Data de Publicação: 2017
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
Texto Completo: http://www.repositorio.ufc.br/handle/riufc/46614
Resumo: SOUZA, M. M. S. On the evaluation of cost functions for parameter optimization of a multiscale shape descriptor. 2017. Artigo (2017 IEEE International Symposium on Signal Processing and Information Technology), New York, 2017.
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spelling On the evaluation of cost functions for parameter optimization of a multiscale shape descriptorOn the evaluation of cost functions for parameter optimization of a multiscale shape descriptorShape descriptionOptimizationClustering metricsShape retrievalShape classificationSOUZA, M. M. S. On the evaluation of cost functions for parameter optimization of a multiscale shape descriptor. 2017. Artigo (2017 IEEE International Symposium on Signal Processing and Information Technology), New York, 2017.Shape description often relies on parameter adjustment in order to configure a meaningful scale that enables a computer vision task. Instead of manual interaction, which is prohibitive for large datasets, an alternative solution towards supporting multiscale methodology is to apply metaheuristic optimization. Nevertheless, the cost function assigned to the optimization process is an open question that we fully address in this paper. Our investigation describes the influence of the cost function on the performance of an optimized multiscale shape descriptor using three distinct clustering metrics: the Silhouette, Davies-Bouldin and Calinski-Harabasz indices. Thus, we optimize the scale parameters of the Normalized Multiscale Bending Energy descriptor using the Simulated Annealing metaheuristic; both classification and retrieval experiments are conducted using a synthetic shape dataset (Kimia 99), two real plant leaf datasets (ShapeCN and Swedish) and the National Library of Medicine (NLM) pill image dataset (NLM Pills). Using the Bulls-eye ratio and the Accuracy measure, the performance evaluation showed that optimized descriptor with the Calinski-Harabasz cost function underperformed other functions for datasets where there is high level of dissimilarity between classes. Particularly for the NLM Pills, where each class has a well-defined pattern and differences within pill classes are quite small, the Normalized Multiscale Bending Energy descriptor did not benefit from the optimization methodology. We also present a qualitative assessment of the cluster arrangements produced by the Self-Organizing Map (SOM) which reinforced that the three cost functions performed differently within the optimized shape descriptor.2017 IEEE International Symposium on Signal Processing and Information Technology2019-10-08T16:29:42Z2019-10-08T16:29:42Z2017info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfSOUZA, M. M. S.http://www.repositorio.ufc.br/handle/riufc/46614Souza, Marcelo Marques Simões deinfo:eu-repo/semantics/openAccessengreponame:Repositório Institucional da Universidade Federal do Ceará (UFC)instname:Universidade Federal do Ceará (UFC)instacron:UFC2023-11-24T18:06:44Zoai:repositorio.ufc.br:riufc/46614Repositório InstitucionalPUBhttp://www.repositorio.ufc.br/ri-oai/requestbu@ufc.br || repositorio@ufc.bropendoar:2024-09-11T18:53:09.367999Repositório Institucional da Universidade Federal do Ceará (UFC) - Universidade Federal do Ceará (UFC)false
dc.title.none.fl_str_mv On the evaluation of cost functions for parameter optimization of a multiscale shape descriptor
On the evaluation of cost functions for parameter optimization of a multiscale shape descriptor
title On the evaluation of cost functions for parameter optimization of a multiscale shape descriptor
spellingShingle On the evaluation of cost functions for parameter optimization of a multiscale shape descriptor
Souza, Marcelo Marques Simões de
Shape description
Optimization
Clustering metrics
Shape retrieval
Shape classification
title_short On the evaluation of cost functions for parameter optimization of a multiscale shape descriptor
title_full On the evaluation of cost functions for parameter optimization of a multiscale shape descriptor
title_fullStr On the evaluation of cost functions for parameter optimization of a multiscale shape descriptor
title_full_unstemmed On the evaluation of cost functions for parameter optimization of a multiscale shape descriptor
title_sort On the evaluation of cost functions for parameter optimization of a multiscale shape descriptor
author Souza, Marcelo Marques Simões de
author_facet Souza, Marcelo Marques Simões de
author_role author
dc.contributor.author.fl_str_mv Souza, Marcelo Marques Simões de
dc.subject.por.fl_str_mv Shape description
Optimization
Clustering metrics
Shape retrieval
Shape classification
topic Shape description
Optimization
Clustering metrics
Shape retrieval
Shape classification
description SOUZA, M. M. S. On the evaluation of cost functions for parameter optimization of a multiscale shape descriptor. 2017. Artigo (2017 IEEE International Symposium on Signal Processing and Information Technology), New York, 2017.
publishDate 2017
dc.date.none.fl_str_mv 2017
2019-10-08T16:29:42Z
2019-10-08T16:29:42Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv SOUZA, M. M. S.
http://www.repositorio.ufc.br/handle/riufc/46614
identifier_str_mv SOUZA, M. M. S.
url http://www.repositorio.ufc.br/handle/riufc/46614
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv 2017 IEEE International Symposium on Signal Processing and Information Technology
publisher.none.fl_str_mv 2017 IEEE International Symposium on Signal Processing and Information Technology
dc.source.none.fl_str_mv reponame:Repositório Institucional da Universidade Federal do Ceará (UFC)
instname:Universidade Federal do Ceará (UFC)
instacron:UFC
instname_str Universidade Federal do Ceará (UFC)
instacron_str UFC
institution UFC
reponame_str Repositório Institucional da Universidade Federal do Ceará (UFC)
collection Repositório Institucional da Universidade Federal do Ceará (UFC)
repository.name.fl_str_mv Repositório Institucional da Universidade Federal do Ceará (UFC) - Universidade Federal do Ceará (UFC)
repository.mail.fl_str_mv bu@ufc.br || repositorio@ufc.br
_version_ 1813028983895228416

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