The homotopy model: a generalized model for smooth surface generation from cross sectional data
The Visual Computer: International Journal of Computer Graphics - Special issue on computer graphics international '89(CGI'89)
Singularity theoretical modeling and animation of garment wrinkle formation processes
The Visual Computer: International Journal of Computer Graphics - Special issue on computer animation 1989/90
Bending and Creasing Virtual Paper
IEEE Computer Graphics and Applications
Computer-Assisted Auto Coloring by Region Matching
PG '03 Proceedings of the 11th Pacific Conference on Computer Graphics and Applications
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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 a popular example of an object that changes the orientation while swimming and also 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.