Jump Flooding in GPU with Applications to Voronoi Diagram and Distance Transform

**Guodong Rong and Tiow-Seng Tan**

{ rongguod | tants }@comp.nus.edu.sg

National University of Singapore

School of Computing

**Abstract**

This paper studies jump flooding as an algorithmic paradigm in the general purpose computation with GPU. As an example application of jump flooding, the paper discusses a constant time algorithm on GPU to compute an approximation to the Voronoi diagram of a given set of seeds in a 2D grid. The errors due to the differences between the approximation and the actual Voronoi diagram are hardly noticeable to the naked eye in all our experiments. The same approach can also compute in constant time an approximation to the distance transform of a set of seeds in a 2D grid. In practice, such constant time algorithm is useful to many interactive applications involving, for example, rendering and image processing. Besides the experimental evidences, this paper also confirms quantitatively the effectiveness of jump flooding by analyzing the occurrences of errors. The analysis is a showcase of insights to the jump flooding paradigm, and may be of independent interests to other applications of jump flooding.

**CR Categories:** I.3.1 [Computer Graphics]: Hardware
Architecture ¨C Graphics Processors; I.3.5 [Computer Graphics]: Computational
Geometry and Object Modeling ¨C Geometric algorithms, languages, and systems;
I.4.1 [Image Processing and Computer Vision]: Digitization and Image Capture ¨C
Image Geometry.

**Keywords: **Digital
geometry, Interactive application, Programmable graphics
hardware.

Paper in The Proceedings of ACM Symposium on Interactive 3D Graphics and Games (i3D 2006), March 14-17, 2006, Redwood City, CA, USA, pp. 109--116, pp. 228.

**Video: **click
here to download the video clip (44M).

**Related Projects: **
JFA Variants,
Soft Shadow with JFA,
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**See also: **ShaderX5 - Advanced Rendering
Techniques (Section 3.3), PhD Thesis (2.3M),
Presentation (61M)

**Dated: 22 December 2005, 12 April 2006, 15 May 2007, 26 June 2007, 13 March 2008**

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