Pencil-Like Sketch Rendering of 3D Scences using Trajectory Planning and Dynamic Trakcing

We present a new non-photorealistic rendering method to render 3D scenes in the form of pencil-like sketches. This work is based on the observation that the dynamic feedback mechanism involving the human visual system and the motor control of the hand collectively generates the visual characteristics unique to hand-drawn sketches. At the heart of our approach is a trajectory planning and tracking algorithm that generates the sketch using a dynamic pen model. A set of target strokes are generated from the silhouette lines, edges, and shaded regions which serve as the target trajectory for a closed-loop dynamic pen model. The pen model then produces the rendered sketch, whose characteristics can be adjusted with a set of trajectory and tracking parameters. We demonstrate our approach with examples.