On the Silhouette Cartoon Animation
Author(s): Tosiyasu L. Kunii, Takao Maeda.
Proceedings: Computer Animation, pp. 110--117, June,
1996.
[BibTeX]
Abstract:
This research addresses the issue of human visual
cognitive capability to identify an object irrespective
of object orientation throughout the course of object
movement in computer animation. The identification
is by cognizing the shape characteristics that are independent
of the object orientation as invariants. Taking
a simple case of a silhouette cartoon animation and
having a dolphin as an popular example of an object
that changes the orientation while swimming and aIs0
jumping up into the air, we show that the orientation
independent invariants are the critical points, namely
the peaks of the convex portion of the object and the
pits of concave portions, and that they are derived from
a graph of the curvature change along the boundary of
the object.