Rendering Nonphotorealistic Strokes with Temporal and Arc-Length Coherence

This system allows for rendering a silhouette of an object in a frame-to-frame coherent way. The input to the system each frame is a set of silhouette pixels in a rendering of the object and their corresponding silhouette edges in a polygonal model (mesh) of the object. The output is a set of silhouette strokes. Nonphotorealistic Rendering (NPR) deals with representing pictures and animation in, as the name suggests, a nonphotorealistic fashion. While there is only one way to render a photo-realistic image, in an NPR system we have the freedom to represent it in an unlimited number of ways. By varying the style of rendering, the image composition and the level of detail, by omit