A magnification lens for interactive volume visualization

被引:42
作者
LaMar, E [1 ]
Hamann, B [1 ]
Joy, KI [1 ]
机构
[1] Lawrence Livermore Natl Lab, Ctr Adv Sci Comp, Livermore, CA 94551 USA
来源
NINTH PACIFIC CONFERENCE ON COMPUTER GRAPHICS AND APPLICATIONS, PROCEEDINGS | 2001年
关键词
D O I
10.1109/PCCGA.2001.962877
中图分类号
TP31 [计算机软件];
学科分类号
081202 ; 0835 ;
摘要
Volume visualization of large data sets suffers from the same problem that many other visualization modalities suffer from: either one can visualize the entire data set and loose small details or visualize a small region and loose the context. In this paper we present a magnification lens technique for volume visualization. While the notion of a magnification-lens is not new, and other techniques attempt to simulate the physical properties of a magnifying lens, our contribution is in developing a magnification lens that is fast, can be implemented using a fairly small software overhead, and has a natural, intuitive appearance. The issue with magnification lens is the border or transition, region. The lens center arid exterior have a constant zoom factor and are simple to render It is the border region that blends between the external and interior magnification. and has a nonconstant magnification. We use the "perspective-correct textures" capability, available in most current graphics systems, to produce a lens with a tessellated border region that approximates linear compression with respect to the radius of the magnification lens. We discuss how a "cubic" border can mitigate the discontinuities resulting from the use of a linear junction, without significant performance loss. We discuss various issues concerning development of a three-dimensional magnification lens.
引用
收藏
页码:223 / 232
页数:10
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