NDLI: Opacity volume based halo generation and depth-dependent halos

Content Provider	Springer Nature Link
Author	Tao, Yubo Wang, Chao Lin, Hai Dong, Feng Clapworthy, Gordon
Copyright Year	2012
Abstract	Halos are generally used to enhance depth perception and display spatial relationships in illustrative visualization. In this paper, we present a simple and effective method to create volumetric halo illustration. At the preprocessing stage, we generate, on graphics hardware, a view-independent halo intensity volume, which contains all of the potential halos around the boundaries of features, based on the opacity volume. During halo rendering, the halo intensity volume is used to extract halos only around the contours of structures for the current viewpoint. The performance of our approach is significantly faster than previous halo illustration methods, which perform both halo generation and rendering during direct volume rendering. We further propose depth-dependent halo effects, including depth color fading and depth width fading. These halo effects adaptively modulate the visual properties of halos to provide more perceptual cues for depth interpretation. Experimental results demonstrate the efficiency of our proposed approach and the effectiveness of depth-dependent halos.
Starting Page	287
Ending Page	296
Page Count	10
File Format	PDF
ISSN	01782789
Journal	The Visual Computer
Volume Number	29
Issue Number	4
e-ISSN	14322315
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-12-05
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Volume rendering Illustrative visualization Halos Depth-dependent halos Depth perception Computer Graphics Computer Science Artificial Intelligence (incl. Robotics) Image Processing and Computer Vision
Content Type	Text
Resource Type	Article
Subject	Computer Graphics and Computer-Aided Design Computer Vision and Pattern Recognition Software

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