Skip to Main content Skip to Navigation
Theses

Représentation structurelle d'images par transformées locales en ondelettes orientées et codage

Abstract : In the context of still image compression, some new représentation implemented with oriented lifting schemes has been conceived. For this thesis, three implementations of these transforms have been benchmarked upon a criteria considering the minimization of the high frequencies along the local direction of regularity. This orientation is estimated via edge extraction or minimization of a cost function. Both approaches lead to the classification of the directional activity of the image blocks. Those representations of the geometrical features that drive the oriented filtering process are coded in order to be transmitted to the decoder. The coding cost of these representations is compared. Finally an adaptive quantization is proposed to take into account the structural classes and the anisotropy of the representation.
Complete list of metadatas

https://tel.archives-ouvertes.fr/tel-00350555
Contributor : Guillaume Jeannic <>
Submitted on : Wednesday, January 7, 2009 - 11:26:08 AM
Last modification on : Wednesday, December 19, 2018 - 3:02:03 PM
Long-term archiving on: : Saturday, November 26, 2016 - 4:09:38 AM

Identifiers

  • HAL Id : tel-00350555, version 1

Collections

Citation

Guillaume Jeannic. Représentation structurelle d'images par transformées locales en ondelettes orientées et codage. Traitement du signal et de l'image [eess.SP]. Université de Nantes, 2008. Français. ⟨tel-00350555⟩

Share

Metrics

Record views

546

Files downloads

2005