Frame coherent 3D stippling for non-photorealistic computer graphics

This thesis deals with the question of how to produce non-photorealistic stippling animations of 3Dmodels. Non-photorealistic animation techniques ought to take into account three important issues that arise when applying 2D drawing styles to 3D model rendering: frame-coherence, scalability and view-dependance, and rendition of animated models. To deal with these issues, the author proposes point hierarchies as an integral and modular technique to generate non-photorealistic animations, and describes how point hierarchies are used to produce stippling animations of static and animated models which are frame-coherent, view-dependant and scalable. Two different approaches to create such point hierarchies are provided and applications of animated stippling are shown in the areas of cartoon animation, medical illustration, real-time rendering, and archaeology.