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In the October-December 2002 issue of these transactions (vol. 8, no. 4), the acknowledgment published was incomplete, resulting in an incomplete attribution of the cover image used for that issue. The acknowledgment should have read as follows:


The authors would like to thank David Román for his hard work using Performer® and Diego Gutiérrez and Jorge del Pico for providing the 3D computer animation of the roach (Fig. 11 and the cover image). The CICYT-Ministry of Education and Science of the Spanish government has partly funded this project (TIC 98-0973-C03-02).

    F.J. Seron and E. Cerezo are with the Advanced Computer Graphics Group (GIGA), Computer Science Department, Technical School of Engineering, University of Zaragoza, C/Maria de Luna, 1, E-50015 Zaragoza, Spain.

    E-mail: {seron, ecerezo}

    R. Rodiguez is with Brainstorm Multimedia, Valencia, Spain.


    A. Pina is with the Mathematic and Computer Science Department, Public University of Navarra, Campus de Arrosadia s/n, E-31006 Pamplona, Spain. E-mail:

For information on obtaining reprints of this article, please send e-mail to:, and reference IEEECS Log Number 112411.


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