A level set-based Eulerian approach for anisotropic wave propagation
نویسندگان
چکیده
منابع مشابه
A level set-based Eulerian approach for anisotropic wave propagation
The geometric optics approximation to high frequency anisotropic wave propagation reduces the anisotropic wave equation to a static Hamilton–Jacobi equation. This equation is known as the anisotropic eikonal equation and has three different coupled wave modes as solutions. We introduce here a level set-based Eulerian approach that captures all three of these wave propagations. In particular, ou...
متن کاملA level set based Eulerian method for paraxial multivalued traveltimes
We apply the level-set methodology to compute multivalued solutions of the paraxial eikonal equation in both isotropic and anisotropic metrics. This paraxial equation is obtained from 2D stationary eikonal equations by using one of the spatial directions as the artificial evolution direction. The advection velocity field used to move level sets is obtained by the method of characteristics; ther...
متن کاملA level set approach to anisotropic flows with curvature regularization
Modeling and simulation of faceting effects on surfaces are topics of growing importance in modern nanotechnology. Such effects pose various theoretical and computational challenges, since they are caused by non-convex surface energies, which lead to ill-posed evolution equations for the surfaces. In order to overcome the ill-posedness, regularization of the energy by a curvature-dependent term...
متن کاملFront Propagation and Level-Set Approach for Geodesic Active Stereovision
Given a weakly calibrated stereo system and a virtual 3D surveillance plane specified by any 3 points given by an external operator, we describe a framework for matching complex 2D planar curves lying at the intersection of the 3D surveillance plane and the 3D scene being observed. This important information may then be used to know which parts of the objects being observed are between the ster...
متن کاملLevel set based Volumetric Anisotropic Diffusion for 3D Image Filtering
We present an anisotropic diffusion model for volumetric image filtering. Our 3D anisotropic diffusion tensor is constructed to enhance 1D features (curves) and 2D features(surfaces). Bilateral prefiltering is employed to construct more accurate anisotropic diffusion tensor. An efficient parallel implementation has been done on a PC cluster, the performance and speed-up are reported also.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Wave Motion
سال: 2003
ISSN: 0165-2125
DOI: 10.1016/s0165-2125(02)00101-4