Computer Graphics Forum, 2011

Improved Model- and View-Dependent Pruning of Large Botanical Scenes

Boris Neubert¹       Sören Pirk¹       Oliver Deussen¹       Carsten Dachsbacher²

¹University of Konstanz, Germany
²Computer Graphics Group/Karlsruhe Institute of Technology, Germany

Abstract

We present an optimized pruning algorithm that allows for considerable geometry reduction in large botanical scenes while maintaining high and coherent rendering quality. We improve upon previous techniques by applying model-specific geometry reduction functions and optimized scaling functions. For this we introduce the use of Precision and Recall (PR) as a measure of quality to rendering and show how PR-scores can be used to predict better scaling values. We conducted a user-study letting subjects adjust the scaling value, which shows that the predicted scaling matches the preferred ones. Finally, we extend the originally purely stochastic geometry prioritization for pruning to account for view-optimized geometry selection, which allows to take global scene information, such as occlusion, into consideration. We demonstrate our method for the rendering of scenes with thousands of complex tree models in real-time.

Paper

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Additional Material

	Precision and Recall View		Color Variation (Scene) View		Color Variation (Model) View
	Comparison Heuristics View		Comparison Scaling View

Bibtex

@article{Neubert.etal:2011:IMVDPLBS,
  author    = {Neubert, Boris and Pirk, S\"oren and Deussen, Oliver and Dachsbacher, Carsten},
  journal   = {Computer Graphics Forum},
  number    = 6,
  pages     = {1708-1718},
  title     = {Improved Model- and View-Dependent Pruning of Large Botanical Scenes},
  url       = {http://graphics.uni-konstanz.de/},
  volume    = 30,
  year      = 2011,
  timestamp = {2011-09-26T00:00:00.000+0200},
  keywords  = {dblp},
  doi       = {http://dx.doi.org/10.1111/j.1467-8659.2011.01897.x},
  publisher = {The Eurographics Association and Blackwell Publishing Ltd.},  
}