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[1] [2] 
Paint by Relaxation
Aaron Hertzmann.
NYU CS, No. 2000-801,
2001. [BibTeX]
Painterly Rendering for Video and Interaction
Aaron Hertzmann, Ken Perlin.
1st International Symposium on Non-Photorealistic Animation and Rendering (NPAR'00), pp. 7--12, Annecy, France, June 5-7,
2000. [BibTeX]
Painterly Rendering with Curved Brush Strokes of Multiple Sizes
Aaron Hertzmann.
SIGGRAPH 98 Conference Proceedings, pp. 453--460, Orlando, Florida, July,
1998. [BibTeX]
Segmentation-Based 3D Artistic Rendering
Author(s): Alexander Kolliopoulos, Jack M. Wang, Aaron Hertzmann.
Proceedings: Eurographics Symposium on Rendering (EGSR'06), pp. 361--370,
2006.
[BibTeX] [DOI] 
Abstract:
This paper introduces segmentation-based 3D non-photorealistic rendering, in which 3D scenes are rendered as a collection of 2D image segments. Segments abstract out unnecessary detail and provide a basis for defining new rendering styles. These segments are computed by a spectral clustering algorithm that can incorporate 3D information, including depth, user-defined importance, and object grouping information. Temporally coherent animation sequences are created by biasing adjacent frames to have similar segmentations. We describe algorithms for rendering segments in styles inspired by a number of hand-painted images.