G-strokes: A concept for simplifying line stylization
Tobias Isenberg, Angela Brennecke.
Computers & Graphics, Vol. 30, No. 5, pp. 754--766, October,
2006. [BibTeX]
High Quality Hatching
Johannes Zander, Tobias Isenberg, Stefan Schlechtweg, Thomas Strothotte.
Computer Graphics Forum (EG'04), Vol. 23, No. 3, pp. 421--430, September,
2004. [BibTeX]
Hybrid Medical Visualizations: Creation and Evaluation
Tobias Isenberg.
Course Notes of the 60th Annual AMI Conference 2005, The Association of Medical Illustrators, Mario Costa Sousa, Non-Photorealistic Rendering (NPR)---Applied Research for the Medical Illustrator, Thousand Oaks, California, USA, July 28--August 1,
2005. [BibTeX]
Illustration Watermarks for Vector Graphics
Henry Sonnet, Tobias Isenberg, Jana Dittmann, Thomas Strothotte.
11th Pacific Conference on Computer Graphics and Applications (PG'03), Jon Rokne, Reinhard Klein, and Wenping Wang, pp. 73--82, Los Alamitos, CA,
2003. [BibTeX]
Non-Photorealistic Rendering in Context: An Observational Study
Tobias Isenberg, Petra Neumann, M. Sheelagh T. Carpendale, Mario Costa Sousa, Joaquim A. Jorge.
Department of Computer Science, University of Calgary, No. Technical Report 2005-805-36, Canada, December,
2005. [BibTeX]
Non-Photorealistic Rendering in Context: An Observational Study
Author(s): Tobias Isenberg, Petra Neumann, M. Sheelagh T. Carpendale, Mario Costa Sousa, Joaquim A. Jorge.
Proceedings: NPAR '06: Proceedings of the 4th international symposium on Non-photorealistic animation and rendering, pp. 115--126, New York, NY, USA, June, ACM Press,
2006.
[BibTeX] [DOI] 
Abstract:
Pen-and-ink line drawing techniques are frequently used to depict form, tone, and texture in artistic, technical, and scientific illustration. In non-photorealistic rendering (NPR), considerable progress has been made towards reproducing traditional pen-and-ink techniques for rendering 3D objects. However, formal evaluation and validation of these NPR images remain an important open research problem. In this paper we present an observational study with three groups of users to examine their understanding and assessment of hand-drawn pen-and-ink illustrations of objects in comparison with NPR renditions of the same 3D objects. The results show that people perceive differences between those two types of illustration but that those that look computer-generated are still highly valued as scientific illustrations.
OPENNPAR: A System for Developing, Programming, and Designing Non-Photorealistic Animation and Rendering
Nick Halper, Tobias Isenberg, Felix Ritter, Bert Freudenberg, Oscar E. Meruvia Pastor, Stefan Schlechtweg, Thomas Strothotte.
11th Pacific Conference on Computer Graphics and Applications (PG'03), pp. 424, Canmore, Canada,
2003. [BibTeX]
Seeing Between the Strokes
Tobias Isenberg, Roland Jesse, Oscar E. Meruvia Pastor, Thomas Strothotte.
Department of Computer Science, Otto-von-Guericke University of Magdeburg, No. Technical Report 11/2004, Germany,
2004. [BibTeX]
Stylizing Silhouettes at Interactive Rates: From Silhouette Edges to Silhouette Strokes
Tobias Isenberg, Nick Halper, Thomas Strothotte.
Computer Graphics Forum,
2002. [BibTeX]
Use of Hybrid Rendering Styles for Presentation
Roland Jesse, Tobias Isenberg.
11th International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision (WSCG),
2003. [BibTeX]