Assessment criteria for 2D shape transformations in animation

Yu, J.-H. and Patterson, J. (1997) Assessment criteria for 2D shape transformations in animation. In: Computer Animation '97, Geneva, 5-6 June 1997, pp. 103-112. ISBN 9780818679841 (doi: 10.1109/CA.1997.601049)

Abstract

The assessment of 2D shape transformations (or morphing) for animation is a difficult task because it is a multi-dimensional problem. Existing morphing techniques pay most attention to shape information interactive control and mathematical simplicity. This paper shows that it is not enough to use shape information alone, and we should consider other factors such as structure, dynamics, timing, etc. The paper also shows that an overall objective assessment of morphing is impossible because factors such as timing are related to subjective judgement, yet local objective assessment criteria, e.g. based on shape, are available. We propose using “area preservation” as the shape criterion for the 2D case as an acceptable approximation to “volume preservation” in reality, and use it to establish cases in which a number of existing techniques give clearly incorrect results. The possibility of deriving objective assessment criteria for dynamics simulations and timing under certain conditions is discussed.

• Item Type: Conference Proceedings
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Patterson, Dr John
• Authors: Yu, J.-H., and Patterson, J.
• Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science; Q Science > QA Mathematics > QA76 Computer software
• College/School: College of Science and Engineering > School of Computing Science
• Publisher: Institute of Electrical and Electronics Engineers
• ISBN: 9780818679841
• Copyright Holders: Copyright © 1997 Institute of Electrical and Electronics Engineers
• First Published: First published in Proceedings : Computer Animation '97
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher