English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/96706
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Citado 2 veces en Web of Knowledge®  |  Ver citas en Google académico
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar otros formatos: Exportar EndNote (RIS)Exportar EndNote (RIS)Exportar EndNote (RIS)
Título

A local algorithm for the computation of image velocity via constructive interference of global fourier components

Autor Dellen, Babette ; Wörgötter, Florentin
Palabras clave Image velocity
Fourier transformation
Constructive interference
Local methods
Fecha de publicación 2011
EditorSpringer
Citación International Journal of Computer Vision 92(1): 53-70 (2011)
ResumenA novel Fourier-based technique for local motion detection from image sequences is proposed. In this method, the instantaneous velocities of local image points are inferred directly from the global 3D Fourier components of the image sequence. This is done by selecting those velocities for which the superposition of the corresponding Fourier gratings leads to constructive interference at the image point. Hence, image velocities can be assigned locally even though position is computed from the phases and amplitudes of global Fourier components (spanning the whole image sequence) that have been filtered based on the motion-constraint equation, reducing certain aperture effects typically arising from windowing in other methods. Regularization is introduced for sequences having smooth flow fields. Aperture effects and their effect on optic-flow regularization are investigated in this context. The algorithm is tested on both synthetic and real image sequences and the results are compared to those of other local methods. Finally, we show that other motion features, i.e. motion direction, can be computed using the same algorithmic framework without requiring an intermediate representation of local velocity, which is an important characteristic of the proposed method. © The Author(s) 2010. This article is published with open access at Springerlink.com.
Descripción This article is distributed under the terms of the Creative Commons Attribution Noncommercial License.
Versión del editorhttp://dx.doi.org/10.1007/s11263-010-0402-2
URI http://hdl.handle.net/10261/96706
DOI10.1007/s11263-010-0402-2
Identificadoresdoi: 10.1007/s11263-010-0402-2
issn: 0920-5691
e-issn: 1573-1405
Aparece en las colecciones: (IRII) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
A local algorithm for.pdf4,14 MBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 



NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.