Premysl Krsek

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This article presents a comparison of several methods for local estimation of normal direction, principal curvatures and principal directions, given a range image as input. Here we take a range image to be a set of points in 3D space; we also need a definition for neighbourhoods. All methods we compare are based on local approximation of the range image by(More)
The article focuses on modification of traditional Marching cubes algorithm for medical applications. Main disadvantage of the traditional algorithm is size of models. A reduction process has been added to the MC to produce much smaller models. The reduction process is applied during the MC, after processing of each input data layer. Resulting models are(More)
The image segmentation plays an important role in medical image processing. Many segmentation algorithms exist. Most of them produce raster data which is not suitable for 3D geometrical modeling of human tissues. In this paper, a vector segmentation algorithm based on a 3D Delaunay triangulation is proposed. Tetrahedral mesh is used to divide a volumetric(More)
Because of FEM computational modelling of human tissues, in number of biomechanical applications , we have needed 3D FEM models of the tissues. Manual creating of the models is often very hard or impossible, because of tissues geometry complexity. Therefore we have developed computer system for fully automatic tetrahedral FEM models creation. Input(More)
INTRODUCTION 3D object construction is one of the key issues of computer graphics and its applications both historically and at the present time. 3D object model representation in computers is the key information in 3D computer graphics, computer vision, and other fields of applications. The 3D models can be obtained through one of the two fundamentally(More)
This paper deals with the new concept of network based virtual collaborative environment to support clinical applications of 3D models of human tissues, created from CT/MR data. It is a topic lying between 3D tissue modeling and PACS systems. Designed system allows clinical realizations of 3D applications as a service to clinical workplaces, provided by(More)