Geometry editing operations commonly use mesh encodings which capture the shape properties of the models. Given modified positions for a set of anchor vertices, the encoding is used to compute the positions for the rest of the mesh vertices, preserving the model shape as much as possible. In this paper, we introduce a new shape preserving and rotation invariant mesh encoding. We use this encodi...

Mesh optimization is critical in numerical simulations involving complex or evolving geometry. Because of the geometric constraints, such as preservation of sharp features and conservation of volume, optimizing a surface mesh poses significant challenges, especially when a CAD model is unavailable. In this paper, we introduce a formulation of volume conservation in a local sense for surface mes...

Recently, time-varying mesh (TVM), which is composed of a sequence of mesh models, has received considerable interest due to its new and attractive functions such as free viewpoint and interactivity. TVM captures the dynamic scene of the real world from multiple synchronized cameras. However, it is expensive and time consuming to generate a TVM sequence. In this paper, an editing system is pres...

Solution-driven mesh adaptation is becoming quite popular for spatial error control in the numerical simulation of complex computational physics applications, such as climate modeling. Typically, spatial adaptation is achieved by element subdivision (h adaptation) with a primary goal of resolving the local length scales of interest. A second, less-popular method of spatial adaptivity is called ...

We present an approach for extracting coherently sampled animated meshes from input sequences of incoherently sampled meshes representing a continuously evolving shape. Our approach is based on multiscale adaptive motion estimation procedure followed by propagation of a template mesh through time. An adaptive signed distance volumes are used as the principal shape representation, and a Bayesian...

This paper describes a method of initialising an Active-Mesh that is to be automatically created and configured directly from a single frame of an image sequence. The aim of this approach is to use the derived mesh to perform visual tracking in unconstrained motion environments, allowing movement of the camera, the scene and even the inclusion of background-independent moving objects. The probl...

This paper presents a video coding scheme for very low bit rate applications The coding approach relies on the notion of active meshes and can be viewed as a particular case of region based coding The active mesh is used to e ci ently represent and code the various regions of the scene as well as the motion information The algorithm involves the following steps Projection time tracking of the r...

A method for performing anisotropic unstructured mesh adaptation is discussed that is well suited for computational fluid dynamics on parallel distributed memory computers. This algorithm which involves mesh motion, rather than refinement and coarsening, is fast, parallel, and fully conservative. The approach is effective at accurately capturing free-surface flows, boundary layers, and unsteady...

The work presents an alternative method for encoding shape-information of video objects, which is a new requirement in the recent revolution of video codec scheme: compressing and transmitting object-based video streams. The proposed method takes the advantage of the latest development in the video encoding — motion compensation on the base of mesh presentation of frame — to complete its target...

An approach for constructing high-order Discontinuous Galerkin schemes which preserve discrete conservation in the presence of arbitrary mesh motion, and thus obey the GCL, is derived. The approach is formulated for the most general case where only the coordinates defining the mesh elements are known at discrete locations in time, and results in the prescription of higher-order quadrature rules...