Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/54276
Título: Dense disparity map estimation respecting image discontinuities: a PDE and scale-space based approach
Autores/as: Alvarez, Luis 
Deriche, Rachid
Sánchez, Javier 
Weickert, Joachim
Clasificación UNESCO: 220990 Tratamiento digital. Imágenes
120601 Construcción de algoritmos
120602 Ecuaciones diferenciales
120326 Simulación
Palabras clave: Optical-Flow Fields
Smoothness Constraints
Phase Information
Stereo
Foundations, et al.
Fecha de publicación: 2002
Editor/a: 1047-3203
Publicación seriada: Journal of Visual Communication and Image Representation 
Resumen: We present an energy based approach to estimate a dense disparity map from a set of two weakly calibrated stereoscopic images while preserving its discontinuities resulting from image boundaries. We first derive a simplified expression for the disparity that allows us to estimate it from a stereo pair of images using an energy minimization approach. We assume that the epipolar geometry is known, and we include this information in the energy model. Discontinuities are preserved by means of a regularization term based on the Nagel-Enkelmann operator, We investigate the associated Euter-Lagrange equation of the energy functional, and we approach the solution of the underlying partial differential equation (PDE) using a gradient descent method. The resulting parabolic problem has a unique solution. In order to reduce the risk, to be trapped within some irrelevant local minima during the iterations, we use a focusing strategy based on a linear scale-space. Experimental results on both synthetic and real images are presented to illustrate the capabilities of this PDE and scale-space based method. (C) 2002 Elsevier Science (USA).
URI: http://hdl.handle.net/10553/54276
ISSN: 1047-3203
DOI: 10.1006/jvci.2001.0482
Fuente: Journal of Visual Communication and Image Representation [ISSN 1047-3203], v. 13, p. 3-21
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