Prior studies on converting three-dimensional (3D) range data into regular two-dimensional (2D) color images using virtual fringe projection techniques showed great promise for 3D range data compression, yet they require resampling the raw scanned data. Due to this resampling, the natural 3D range data are altered and sampling error may be introduced. This paper presents a method that compresse...

A primary shortcoming of existing techniques for 3D model matching is the reliance on global information of model’s structure. Models are matched in their entirety, depending on overall topology and geometry information. A current open challenge is how to perform partial matching. Partial matching is important for finding similarities across part models with different global shape properties an...

High-speed computational procedures for space radiation shielding have relied on asymptotic expansions in terms of the off-axis scatter and replacement of the general geometry problem by a collection of flat plates. This type of solution was derived for application to human rated systems in which the radius of the shielded volume is large compared to the off-axis diffusion limiting leakage at l...

Computer vision is one out of many areas that want to understand the process of human functionality and copy that process with intention to complement human life with intelligent machines. For better human–computer interaction it is necessary for the machine to see people. This can be achieved by employing face detection algorithms, like the one used in the installation “15 Seconds of Fame” [7]...

We describe an algorithm to automatically align 3D views of an object (registration), acquired by an optical 3D sensor from different directions. The method is based on the selection and assignment of “salient” points, with respect to information theoretical considerations. The approach is implemented and we demonstrate its ability to reliably register 3D-views of a wide range of objects, withi...

Multimedia Information System in 3D Space (MISS) is a case study project for development and testing of information system using both HTML and VRML paradigms. Buildings, offices and other parts of a real world are modeled by VRML and finally presented via WWW. Realistic look of virtual space helps to gain information in a natural way. A pilot version of MISS has been developed for Department of...

Various methods to create intricate tilings of 3D space are presented. They include modulated extrusions of 2D Escher tilings, free-form deformations of the fundamental domain of various 3D symmetry groups, highly symmetrical polyhedral toroids of genus 1, higher-genus cage structures derived from the cubic lattice as well as from the diamond and triamond lattices, and finally interlinked tiles...

A technique for recognizing planar objects in three-dimensional space is described. The object’s domain is not restricted to purely two-dimensional items but includes fairly flat real objects such as a pair of scissors. To tackle realistic matching problems, the proposed method is invariant to changes within a prescribed range of perspective viewpoints, scaling, shift and reasonable degree of o...

For an interactive visualization of three dimensional (3D) city models a Level of Detail representation is extremely useful to avoid unnecessary computations. Differently detailed models of the same object are displayed depending on the distance of the object. This implies that less detailed models have to be generated from complex models (generalization). In this paper an approach for the auto...

Most current commercial GIS vendors are added function of 3D analysis for the reality visualization more and more. 3D GIS vendors are focus on the 3D visually representation of the terrain and buildings. These are limited in cityscape and landscape, navigating simulation, and 3D visibility analysis. Recently, some researches of 3D spatial analysis is presented cause that the geo-spatial DBMS, e...