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1 MAP5 - MAP5 - Mathématiques Appliquées à Paris 5 2 Mathematics department 3 CMLA - Centre de Mathématiques et de Leurs Applications 4 UCLA - UCLA

Abstract : Can images be decomposed into the sum of a geometric part and a textural part? In a theoretical breakthrough, Yves Meyer proposed variational models that force the geometric part into the space of functions with bounded variation, and the textural part into a space of oscillatory distributions. Meyer-s models are simple minimization problems extending the famous total variation model. However, their numerical solution has proved challenging. It is the object of a literature rich in variants and numerical attempts. This paper starts with the linear model, which reduces to a low-pass-high-pass filter pair. A simple conversion of the linear filter pair into a non-linear filter pair involving the total variation is introduced. This new-proposed nonlinear filter pair retains both the essential features of Meyer-s models and the simplicity and rapidity of the linear model. It depends on only one transparent parameter: the texture scale, measured in pixel mesh. Comparative experiments show a better and faster separation of cartoon from texture. One application is illustrated: edge detection.

Autor: Antoni Buades - Triet Le - Jean-Michel Morel - Luminita Vese -



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