On the definition and recognition of planar shapes in digital images
Supervisor(es): Morel, Jean-Michel
Resumen:
This thesis deals with the recognition of shapes in digital images. A suitable shape representation is derived by analyzing invariance to perturbations that do not significantly affect visual recognition: contrast changes, partial occlusion, noise, perspective distortion. The atours of such a representation,called shape elements, provide semi local descriptions of shapes. Matching shape elements enables the recognition of "partial shapes" : Then, "global shapes" are defined as groups of partial shapes showing some spatial coherence. Deriving unsupervised thresholds involved in all decision levels of the shape recognition process, is the central points of this work. We propose decision rules for both the correspondence problem of partial shapes, and for the detection of global shapes. The proposed framework is based on a general detection methodology asserting that meaningful events may be viewed as exceptions to randomness.
Cette thèse traite de la reconnaissance des formes dans les images numériques. Une représentation appropriée des formes est déduite de l'analyse des perturbations qui n'affectent pas la reconnaissance : changement de contraste, occlusion partielle, bruit, perspective. Les atomes de cette représentation, appelés "éléments de forme", fournissent des descriptions semi-locales des formes. L'appariement de ces éléments permet de reconnaitre des formes partielles. Les formes globales sont alors définies comme des groupes de formes partielles présentant une cohérence dans leur disposition spatiale. L'aspect fondamental de ce travail est la mise en place de seuils non-supervisés, à tous les niveaux de décision du processus de reconnaissance. Nous proposons des règles de décision pour la en correcpondance de formes partielles ainsi que pour la détection de formes globales. Le cadre proposé est basé sur une méthodologie générale de la détection dans laquelle un événement est significatif s'il n'est pas susceptible d'arriver par hasard.
2004 | |
Inglés | |
Universidad de la República | |
COLIBRI | |
http://hdl.handle.net/20.500.12008/20206 | |
Acceso abierto | |
Licencia Creative Commons Atribución – No Comercial – Sin Derivadas (CC - By-NC-ND) |
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---|---|
author | Musé, Pablo |
author_facet | Musé, Pablo |
author_role | author |
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collection | COLIBRI |
dc.creator.advisor.none.fl_str_mv | Morel, Jean-Michel |
dc.creator.none.fl_str_mv | Musé, Pablo |
dc.date.accessioned.none.fl_str_mv | 2019-02-21T20:56:45Z |
dc.date.available.none.fl_str_mv | 2019-02-21T20:56:45Z |
dc.date.issued.es.fl_str_mv | 2004 |
dc.date.submitted.es.fl_str_mv | 20190221 |
dc.description.abstract.none.fl_txt_mv | This thesis deals with the recognition of shapes in digital images. A suitable shape representation is derived by analyzing invariance to perturbations that do not significantly affect visual recognition: contrast changes, partial occlusion, noise, perspective distortion. The atours of such a representation,called shape elements, provide semi local descriptions of shapes. Matching shape elements enables the recognition of "partial shapes" : Then, "global shapes" are defined as groups of partial shapes showing some spatial coherence. Deriving unsupervised thresholds involved in all decision levels of the shape recognition process, is the central points of this work. We propose decision rules for both the correspondence problem of partial shapes, and for the detection of global shapes. The proposed framework is based on a general detection methodology asserting that meaningful events may be viewed as exceptions to randomness. Cette thèse traite de la reconnaissance des formes dans les images numériques. Une représentation appropriée des formes est déduite de l'analyse des perturbations qui n'affectent pas la reconnaissance : changement de contraste, occlusion partielle, bruit, perspective. Les atomes de cette représentation, appelés "éléments de forme", fournissent des descriptions semi-locales des formes. L'appariement de ces éléments permet de reconnaitre des formes partielles. Les formes globales sont alors définies comme des groupes de formes partielles présentant une cohérence dans leur disposition spatiale. L'aspect fondamental de ce travail est la mise en place de seuils non-supervisés, à tous les niveaux de décision du processus de reconnaissance. Nous proposons des règles de décision pour la en correcpondance de formes partielles ainsi que pour la détection de formes globales. Le cadre proposé est basé sur une méthodologie générale de la détection dans laquelle un événement est significatif s'il n'est pas susceptible d'arriver par hasard. |
dc.identifier.citation.es.fl_str_mv | MUSÉ, P. "On the definition and recognition of planar shapes in digital images". Tesis de doctorado, École Normale Supérieure de Cachan (France), 2004. |
dc.identifier.uri.none.fl_str_mv | http://hdl.handle.net/20.500.12008/20206 |
dc.language.iso.none.fl_str_mv | en eng |
dc.publisher.es.fl_str_mv | École Normale Supérieure de Cachan |
dc.rights.license.none.fl_str_mv | Licencia Creative Commons Atribución – No Comercial – Sin Derivadas (CC - By-NC-ND) |
dc.rights.none.fl_str_mv | info:eu-repo/semantics/openAccess |
dc.source.none.fl_str_mv | reponame:COLIBRI instname:Universidad de la República instacron:Universidad de la República |
dc.title.none.fl_str_mv | On the definition and recognition of planar shapes in digital images |
dc.type.es.fl_str_mv | Tesis de doctorado |
dc.type.none.fl_str_mv | info:eu-repo/semantics/doctoralThesis |
dc.type.version.none.fl_str_mv | info:eu-repo/semantics/acceptedVersion |
description | This thesis deals with the recognition of shapes in digital images. A suitable shape representation is derived by analyzing invariance to perturbations that do not significantly affect visual recognition: contrast changes, partial occlusion, noise, perspective distortion. The atours of such a representation,called shape elements, provide semi local descriptions of shapes. Matching shape elements enables the recognition of "partial shapes" : Then, "global shapes" are defined as groups of partial shapes showing some spatial coherence. Deriving unsupervised thresholds involved in all decision levels of the shape recognition process, is the central points of this work. We propose decision rules for both the correspondence problem of partial shapes, and for the detection of global shapes. The proposed framework is based on a general detection methodology asserting that meaningful events may be viewed as exceptions to randomness. |
eu_rights_str_mv | openAccess |
format | doctoralThesis |
id | COLIBRI_54257d3b1aa442786b4bcee50a8440f4 |
identifier_str_mv | MUSÉ, P. "On the definition and recognition of planar shapes in digital images". Tesis de doctorado, École Normale Supérieure de Cachan (France), 2004. |
instacron_str | Universidad de la República |
institution | Universidad de la República |
instname_str | Universidad de la República |
language | eng |
language_invalid_str_mv | en |
network_acronym_str | COLIBRI |
network_name_str | COLIBRI |
oai_identifier_str | oai:colibri.udelar.edu.uy:20.500.12008/20206 |
publishDate | 2004 |
reponame_str | COLIBRI |
repository.mail.fl_str_mv | mabel.seroubian@seciu.edu.uy |
repository.name.fl_str_mv | COLIBRI - Universidad de la República |
repository_id_str | 4771 |
rights_invalid_str_mv | Licencia Creative Commons Atribución – No Comercial – Sin Derivadas (CC - By-NC-ND) |
spelling | 2019-02-21T20:56:45Z2019-02-21T20:56:45Z200420190221MUSÉ, P. "On the definition and recognition of planar shapes in digital images". Tesis de doctorado, École Normale Supérieure de Cachan (France), 2004.http://hdl.handle.net/20.500.12008/20206This thesis deals with the recognition of shapes in digital images. A suitable shape representation is derived by analyzing invariance to perturbations that do not significantly affect visual recognition: contrast changes, partial occlusion, noise, perspective distortion. The atours of such a representation,called shape elements, provide semi local descriptions of shapes. Matching shape elements enables the recognition of "partial shapes" : Then, "global shapes" are defined as groups of partial shapes showing some spatial coherence. Deriving unsupervised thresholds involved in all decision levels of the shape recognition process, is the central points of this work. We propose decision rules for both the correspondence problem of partial shapes, and for the detection of global shapes. The proposed framework is based on a general detection methodology asserting that meaningful events may be viewed as exceptions to randomness.Cette thèse traite de la reconnaissance des formes dans les images numériques. Une représentation appropriée des formes est déduite de l'analyse des perturbations qui n'affectent pas la reconnaissance : changement de contraste, occlusion partielle, bruit, perspective. Les atomes de cette représentation, appelés "éléments de forme", fournissent des descriptions semi-locales des formes. L'appariement de ces éléments permet de reconnaitre des formes partielles. Les formes globales sont alors définies comme des groupes de formes partielles présentant une cohérence dans leur disposition spatiale. L'aspect fondamental de ce travail est la mise en place de seuils non-supervisés, à tous les niveaux de décision du processus de reconnaissance. Nous proposons des règles de décision pour la en correcpondance de formes partielles ainsi que pour la détection de formes globales. Le cadre proposé est basé sur une méthodologie générale de la détection dans laquelle un événement est significatif s'il n'est pas susceptible d'arriver par hasard.Made available in DSpace on 2019-02-21T20:56:45Z (GMT). No. of bitstreams: 4 license_text: 21936 bytes, checksum: 9833653f73f7853880c94a6fead477b1 (MD5) license_url: 49 bytes, checksum: 4afdbb8c545fd630ea7db775da747b2f (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) license.txt: 4194 bytes, checksum: 7f2e2c17ef6585de66da58d1bfa8b5e1 (MD5) Previous issue date: 2004enengÉcole Normale Supérieure de CachanLas obras depositadas en el Repositorio se rigen por la Ordenanza de los Derechos de la Propiedad Intelectual de la Universidad De La República. (Res. Nº 91 de C.D.C. de 8/III/1994 – D.O. 7/IV/1994) y por la Ordenanza del Repositorio Abierto de la Universidad de la República (Res. Nº 16 de C.D.C. de 07/10/2014)info:eu-repo/semantics/openAccessLicencia Creative Commons Atribución – No Comercial – Sin Derivadas (CC - By-NC-ND)On the definition and recognition of planar shapes in digital imagesTesis de doctoradoinfo:eu-repo/semantics/doctoralThesisinfo:eu-repo/semantics/acceptedVersionreponame:COLIBRIinstname:Universidad de la Repúblicainstacron:Universidad de la RepúblicaMusé, PabloMorel, Jean-MichelÉcole Normale Supérieure de Cachan (France)Docteur en Mathématiques 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- Universidad de la Repúblicafalse |
spellingShingle | On the definition and recognition of planar shapes in digital images Musé, Pablo |
status_str | acceptedVersion |
title | On the definition and recognition of planar shapes in digital images |
title_full | On the definition and recognition of planar shapes in digital images |
title_fullStr | On the definition and recognition of planar shapes in digital images |
title_full_unstemmed | On the definition and recognition of planar shapes in digital images |
title_short | On the definition and recognition of planar shapes in digital images |
title_sort | On the definition and recognition of planar shapes in digital images |
url | http://hdl.handle.net/20.500.12008/20206 |