摘要:

AbstractMost of the available algorithms for scalar volume visualization offer predefined techniques such as display of volumetric regions defined by scalar threshold values. The regions can usually be drawn opaque or transparent or appear in combinations. This paper presents an implementation of a volume visualization concept where several modelling and rendering techniques can be applied in any combination, mainly bounded by the creativity of the user.The concept is based on the use of a model for light scattering in a field of varying density emitters, and the use of fixed visual references to improve readability and disambiguate interpretation. An image is computed by means of an interval‐based mapping from scalar range to visual parameters. Each interval has a set of associated parameters, such as colour and attenuation. In addition, each interval of the scalar range must be mapped into relative density by means of a transfer function which is selected in a ‘natural way’ depending on application. A methodology is suggested which enable the piecewise transfer functions to be easily determined.A prototype user‐interface for the mapping from scalar values to visual parameters is demonstrated. The interface is easy to use for the beginner, while it also encourages creativity and intuition in the process of selecting par

ISSN:1049-8907    

DOI:10.1002/vis.4340030103

出版商:John Wiley&Sons, Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractTo facilitate the effective use of strength data in a human‐task simulation environment, we have developed graphical methods to display the multidimensional characteristics of strength data. We use human figures together with two and three dimensional graphical symbols, colours and animations to visualize the effects of different parameters on strength. These displays give a dynamic view of the effects of various parameters on strength, and illustrate safe and forbidden body postures (or regions) in terms of strength capabilitie

ISSN:1049-8907    

DOI:10.1002/vis.4340030104

出版商:John Wiley&Sons, Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractArtists do not always pursue photographic realism. The image abstraction and deformation of three‐dimensional scenes are methods to communicate ideas. Images are the visual interpretation of real life or imaginary scenes. This paper describes the idea of an infinite reflection model in which synthetic objects to be rendered are surrounded by closed reflective surfaces. The closed mirror surfaces create the ‘feedback’ effect which deforms objects inside the reflective space. Lens distortion effects are achieved by surrounding infinitely reflective curved surfaces. This technique provides a new visual tool for artists and graphic desi

ISSN:1049-8907    

DOI:10.1002/vis.4340030105

出版商:John Wiley&Sons, Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractChoreographed fluid‐like motions have been created and used to animate two dimensional images. Techniques are presented for generating these animations by repeatedly warping images using vector field representations of arbitrary flowing motions. Tools that allow interactively creating and aligning vector flow‐fields with images are also described. These methods lend themselves well to highly parallel computation, and have been implemented using the Connection Machine Sys

ISSN:1049-8907    

DOI:10.1002/vis.4340030106

出版商:John Wiley&Sons, Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractA simple unified approach for dealing with constraints on real‐valued parameters in computer simulations and computer animation is described. The main characteristics of the approach are its flexibility (it works for a variety of constraint‐types and it can be implemented to handle both under‐ and over‐constrained systems in a stable way) and its ease for distributed computation. The method is based on the idea of genetic algorithms. The mathematical merits of the method for one constraint‐type are discussed in some detail and some examples of applications

ISSN:1049-8907    

DOI:10.1002/vis.4340030107

出版商:John Wiley&Sons, Ltd    

年代:1992

数据来源: WILEY

ISSN:1049-8907    

DOI:10.1002/vis.4340030108

出版商:John Wiley&Sons, Ltd    

年代:1992

数据来源: WILEY

ISSN:1049-8907    

DOI:10.1002/vis.4340030102

出版商:John Wiley&Sons, Ltd    

年代:1992

数据来源: WILEY