نتایج جستجو برای: deformable meshes
تعداد نتایج: 20619 فیلتر نتایج به سال:
This thesis deals with surface extraction from noisy volumetric images, which is a common problem in medical image analysis. Due to noise, the use of a-priori information about surface topology and shape is necessary for automatic surface extraction methods. Deformable surface models can incorporate such geometric knowledge into extraction process which is restated as an energy minimization pro...
In this paper, we propose a novel method for fully automatic detection and tracking of human heads and faces in video sequences. The proposed algorithm consists of two modules: a face detection module and a face tracking module. The Detection module, detects the face region and approximates it with an ellipse at the first frame using a modified version of AdaBoost cascaded classifier. The detec...
Highly detailed models are commonly used in computer games and other interactive rendering applications. Intuitive editing methods are thus also required in addition to rendering algorithms. Progressive meshes are often employed to improve the rendering performance by reducing the number of rasterized triangles. The classical work flow is to generate a model and then use simplification algorith...
This paper presents a novel selective refinement scheme of progressive meshes. In previous schemes, topology information in the neighborhood of a collapsed edge is stored in the analysis phase. A vertex split or edge collapse transformation is possible in the synthesis phase only if the configuration of neighborhood vertices in the current mesh corresponds to the stored topology information. In...
A view-dependent progressive mesh (VDPM) coding algorithm is proposed in this research to facilitate interactive 3D graphics streaming and browsing. The proposed algorithm splits a 3D graphics model into several partitions, progressively compresses each partition, and reorganizes topological and geometrical data to enable the transmission of visible parts with a higher priority. With the real-t...
The objective of the present work is to develop a new numerical framework for simulations involving deformable domains, in specific context high-order meshes consistent with Computer-Aided Design (CAD) representations. Thus, proposed approach combines ideas from isogeometric analysis, able handle exactly CAD-based geometries, and Discontinuous Galerkin (DG) methods an Arbitrary Lagrangian-Euler...
1 Project Summary The goal of this research is to develop a general-purpose computational scheme for representing the geometry and physics of human-body soft-tissue structures and simulating their displacements and deformations in real-time when external forces are applied by surgical instruments. The ability to realistically model soft tissues on a computer has the potential to radically chang...
This paper presents a multi-material dual “contouring” method used to convert digital 3D voxel-based atlas of basal ganglia deformable discrete multi-surface model that supports surgical navigation for an intraoperative MRI-compatible robot, featuring fast deformation computation. It is vital the final surface maintain shared boundaries where appropriate so even as deep-brain deforms reflect ch...
This work introduces “generalized meshes”, a type of meshes suited for the discretization partial differential equations in non-regular geometries. Generalized extend regular simplicial by allowing overlapping elements and more flexible adjacency relations. They can have several distinct “generalized” vertices (or edges, faces) that occupy same geometric position. These generalized facets are n...
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