Showing papers in "Computers & Graphics in 1997"

TL;DR: The major advances in a new discipline, Computer Haptics (analogous to computer graphics), that is concerned with the techniques and processes associated with generating and displaying haptic stimuli to the human user are described.

TL;DR: Various techniques to integrate force feedback in shared virtual simulations, dealing with significant and unpredictable delays are described.

TL;DR: An algorithm that given a generalized planar graph obtains its Constrained Delaunay triangulation (CDT) and an algorithm that generates the CDT of a given polygon (possibly with holes) is obtained.

TL;DR: A new algorithm which tests the inclusion of a point in a general polyhedron, manifold and non-manifold, without solving any equation system and without using trigonometric functions is presented.

TL;DR: A rule-based geometric constraint solver that handles 2-D, variational, constraint-defined geometric objects and proves that the sequence in which the solver applies the construction steps defines a terminating confluent reduction system.

TL;DR: An experiment that tested the ease of reading specific formats that could be used for on-line publications, such as magazines, showed that paging is faster than scrolling and a single wide column is read faster than three columns.

TL;DR: A virtual reality training simulation that allows the trainee to perform a patient examination and palpate (touch) the patient's virtual liver to search for hard regions beneath the surface of subsurface tumors.

TL;DR: Two methods for wavelet domain rendering of volume data sets, which are based on entirely different paradigms for the approximation of the underlying volume rendering equation are described.

TL;DR: This paper introduces a new method to deform an object, its volume being preserved, based on the space deformation model called DOGME, and uses a distinctive feature of this model to solve the problem of volume preservation.

TL;DR: An algorithm has been developed, for economical curve implementation and pleasant demonstration, which ultimately replaces the rational cubic locally in each of the intervals by a constant, linear, rational quadratic or rational cubic function according to the nature of the slopes and parameters in that interval.

TL;DR: A segmentation pipeline for computer-based automatic analysis of multimodal tomographic images and a statistical investigation that compares the wavelet transform to classical texture analysis methods are presented.

TL;DR: A new human computer interface which offers an alternative to traditional mouse and direct manipulation interfaces and enables a user to specify commands and additional parameters by drawing single intuitive gestures with his finger is proposed.

TL;DR: Current research at the Fraunhofer IGD addresses concepts for interface and integration of haptic displays into virtual environments, and addresses the integration of commercially available libraries and devices within the VirtualDesignII (VDII), a VR toolkit developed in-house.

TL;DR: The method proposed in this paper employs the CSG approach: a 3-D solid computer model is reconstructed from 2-D line drawings of six orthographic opaque views, viz. top, front, left, right, bottom and rear views.

TL;DR: The development of an extension and refinement of an existing microscopic model of fluid and a formalization of some of the results of using this model, which displays great potential for simulation of surface waves, spray, and interactions between solid objects and fluid.

TL;DR: An inference algorithm for generalized finite automata and a lossy compression system for bi-level and simple color images based on this algorithm and vector quantization are described.

TL;DR: A spring force fomulation for animating elastically deformable models is presented, in which elastic properties of the materials are represented as external spring forces as opposed to forming complicated stiffness matrices.

TL;DR: A system for interacting with shapes in two-dimensional images with force feedback, using haptic devices, is described, and multiresolution models of boundary curves in images are constructed, using wavelet multiresolved with good approximation properties.

TL;DR: This paper presents a high quality beam tracer that provides a robust and general antialiasing for polyhedral scenes and is entirely compatible with the usual improvements of classical ray tracing (spatial subdivisions or hierarchical bounding volumes).

TL;DR: A newly developed method is described that overcomes short-comings by integrating the core technologies of force feedback, reality registration and virtual fixtures to achieve significant operator performance improvements.

TL;DR: Two implementations of the Cube-4 volume rendering architecture, developed at SUNY Stony Brook, on the Teramac custom computing machine are presented, indicating scalable performance with the number of rendering pipelines and real-time frame-rates for high-resolution datasets.

TL;DR: A solution is presented that allows profit from new DRAM interfaces like Rambus-DRAM, SDRAM etc to be used for real-time direct volume rendering and is a multi-level cache system with software prefetching and latency hiding.

TL;DR: The acceleration techniques with extrapolation presented for solution to a system of nonlinear equations can be used to speed up tracing the intersection of two parametric surfaces as well as others that need Newton iteration.

TL;DR: Functionals that are equivarian with respect to the symmetries of a tetrahedron are determined and linear combinations of these functions that give rise to chaotic attractors are used to create images in 3-space of attractors with the symmetry of the tetrahedral structure.

TL;DR: In this paper, a new line clipping algorithm for convex polyhedron is given. The speed up is achieved because of the known order of triangles, and the algorithm has O(N) complexity in the worst case and expected O(√ n) complexity.

TL;DR: A well-known B-spline volume is extended to a high-dimensional trivariate model and the feature segmentation of meaningful information from the derived volumetric model is presented.

TL;DR: This paper uses a parameter optimization method for forward dynamic simulation to obtain a good set of values for the control variables of the system, and extends this method by using a musculotendon skeletal model for the human body instead of the more commonly used robot model to provide more accurate human motion simulations.

TL;DR: Examples of the main graphical capabilities are presented, methods and simplifications used to create high quality images are discussed and some of the decisions made during simulation and development of the complex VISA+ architecture are justified.

TL;DR: In this paper, a physics-based deformable curve and surface modeling technique is presented, which is efficient and easy to use in many aspects of geometric design, such as the construction of N-sided patches, surface smooth joining, and surface fairing.

TL;DR: 3-D IFS is explored for creating fascinating fractal scenes with efficient coloring, lighting and mist effects scheme and a program using the proposed scheme has been developed that can render delicate scenes consisting of multiple IFS fractals in real-time on the PC.