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New Generation Computing

, Volume 22, Issue 3, pp 271–293 | Cite as

Procedural texture evolution using multi-objective optimization

  • Brian J. Ross
  • Han Zhu
Regular Papers

Abstract

This paper investigates the application of evolutionary multi-objective optimization to two-dimensional procedural texture synthesis. Genetic programming is used to evolve procedural texture formulae. Earlier work used multiple feature tests during fitness evaluation to rate how closely a candidate texture matches visual characteristics of a target texture image. These feature test scores were combined into an overall fitness score using a weighted sum. This paper improves this research by replacing the weighted sum with a Pareto ranking scheme, which preserves the independence of feature tests during fitness evaluation. Three experiments were performed: a pure Pareto ranking scheme, and two Pareto experiments enhanced with parameterless population divergence strategies. One divergence strategy is similar to that used by the NSGA-II system, and scores individuals using their nearest-neighbour distance in feature-space. The other strategy uses a normalized, ranked abstraction of nearest neighbour distance. A result of this work is that acceptable textures can be evolved much more efficiently and with less user intervention with MOP evolution than compared to the weighted sum approach. Although the final acceptability of a texture is ultimately a subjective decision of the user, the proposed use of multi-objective evolution is useful for generating for the user a diverse assortment of possibilities that reflect the important features of interest.

Keywords

Procedural Textures Multi-objective Optimization Genetic Programming 

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Copyright information

© Ohmsha, Ltd. and Springer 2004

Authors and Affiliations

  • Brian J. Ross
    • 1
  • Han Zhu
    • 1
  1. 1.Dept. of Computer ScienceBrock UniversitySt. CatharinesCanada

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