This report is concerned with understanding the interplay between 3D face reconstruction and recognition. We provide analysis for the effect of adaptive sparse 3D reconstructions on recognition rate. This work illustrates that, for 3D face recognition, a proper mesh containing nearly 2% of the facial information and about 5 times the initial/root mesh provides similar recognition rate as one wi...

Perhaps the most common approach to solving PDEs in engineering applications is through use of nite-element approximations. In free-boundary problems this usually requires adaptive meshing that tracks the surface motion. These meshing schemes may not be able to handle shock formation or topological changes without arcane logic or user intervention. Inconvenient in simulation, this can cause gra...

Straight line and column envelope type meshing pairs are two important meshing pairs in single screw compressors, while straight line envelope meshing pair is actualized but the other is still fail to meet industrial applications. The column envelope meshing pair of single screw compressors is proposed to improve the operating life of the compressor for poor wear resistance of existing straight...

A program to automate the finite element method (FEM) using various soft-computing techniques is presented. The overall program is discussed, and the implementations of three specific sub-problems (mesh placement, node numbering, and adaptive meshing) are described. It is also argued that the overall architecture of an “intelligent finite element package” can serve as a “test-bed” for many soft...

Parallel Constrained Delaunay Mesh (PCDM) is a 2D adaptive and irregular meshing algorithm. In PCDM one can explore concurrency using three different levels of granularity: (i) coarse-grain at the sub-mesh level, (ii) medium-grain at the cavity level and (iii) fine-grain at the element level. The mediumand fine-grain approaches can be used to improve the single-processor performance of coarse-g...

In this paper, we apply our proposed early parallel adaptive computing methodology for numerical solution of semiconductor device equations with triangular meshing technique. This novel simulation based on adaptive triangular mesh, finite volume, monotone iterative, and a posteriori error estimation methods, is developed and successfully implemented on a Linux-cluster with message passing inter...

This paper proposes chordal surface transform for representation and discretization of thin section solids, such as automobile bodies, plastic injection mold components and sheet metal parts. A multiple-layered all-hex mesh with a high aspect ratio is a typical requirement for mold flow simulation of thin section objects. The chordal surface transform reduces the problem of 3D hex meshing to 2D...

We present a new method for adaptive surface meshing and triangulation which controls the local level–of–detail of the surface approximation by local spectral estimates. These estimates are determined by a wavelet representation of the surface data. The basic idea is to decompose the initial data set by means of an orthogonal or semi–orthogonal tensor product wavelet transform (WT) and to analy...