SilF : A Sketching Tool for Pseudo 3D Representation Based on 3D Outline

Abstract

This paper presents a new pseudo 3D representation and its rendering algorithm for cartoon-like illustrations, which tolerates viewpoint/view-angle changes. In our representation, target 3D objects are represented as outlines only, not as full 3D geometries such as polygons. These outlines of the illustration are located in 3D space, not on 2D plane. We call this 3D curve as 3D outline. Although this model has restricted 3D information, we can view and rotate the illustration as if there is a full 3D geometry. We have implemented a prototype system, SilF, for viewing and editing 3D outlines with 2D-like sketching interface using common 2D input devices.