Efficient Display of Background Objects for Virtual Endoscopy using Flexible First-Hit Ray Casting
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Date
2004
Journal Title
Journal ISSN
Volume Title
Publisher
The Eurographics Association
Abstract
Many applications of virtual endoscopy require the display of background objects behind the semi-transparent surface of the investigated organ. This paper deals with pre-processing and visualization of background objects for virtual endoscopy. A new first-hit ray casting technique for efficient perspective iso-surfacing of arbitrarily selected objects of interest is described: Visualization is performed without the use of dedicated hardware or data structures limiting flexibility (e.g., polygonal meshes or distance fields). The speedup is gained by exploiting inter-pixel coherency and by finding a near-optimal compromise between reduction of ray-tracking distances and limitation of the administrational cost associated with this reduction. The algorithm was developed by enhancing the previously published cell-based first-hit ray casting algorithm. This paper describes the original algorithm and explains the extensions needed to achieve interactive rendering of background objects.
Description
@inproceedings{10.2312:VisSym/VisSym04/301-310,
booktitle = {Eurographics / IEEE VGTC Symposium on Visualization},
editor = {Oliver Deussen and Charles Hansen and Daniel Keim and Dietmar Saupe},
title = {{Efficient Display of Background Objects for Virtual Endoscopy using Flexible First-Hit Ray Casting}},
author = {Neubauer, A. and Forster, M. and Wegenkittl, R. and Mroz, L. and Bühler, K.},
year = {2004},
publisher = {The Eurographics Association},
ISSN = {1727-5296},
ISBN = {3-905673-07-X},
DOI = {10.2312/VisSym/VisSym04/301-310}
}