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
Tobias Isenberg, Petra Neumann, M. Sheelagh T. Carpendale, Mario Costa Sousa, Joaquim A. Jorge.
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]
NPAR by Example: Line Drawing Facial Animation from Photographs
Yuan Luo, Marina L. Gavrilova, Mario Costa Sousa.
International Conference on Computer Graphics, Imaging and Visualisation (CGIV'06), pp. 514--521, Los Alamitos, CA, USA, IEEE Computer Society,
2006. [BibTeX]
Observational Model of Blenders and Erasers in Computer-Generated Pencil Rendering
Mario Costa Sousa, John W. Buchanan.
Proceedings of Graphics Interface (GI'99), pp. 157--166,
1999. [BibTeX]
Observational Models of Graphite Pencil Materials
Author(s): Mario Costa Sousa, John W. Buchanan.
Article: Computer Graphics Forum, Vol. 19, No. 1, pp. 27--49, March,
2000.
[BibTeX] 
Abstract:
This paper presents models for graphite pencil, drawing paper, blenders, and kneaded eraser that produce realistic looking pencil marks, textures, and tones. Our models are based on an observation of how lead pencils interact with drawing paper, and on the absorptive and dispersive properties of blenders and erasers interacting with lead material deposited over drawing paper. The models consider parameters such as the particle composition of the lead, the texture of the paper, the position and shape of the pencil materials, and the pressure applied to them. We demonstrate the capabilities of our approach with a variety of images
and compare them to digitized pencil drawings. We also present image-based rendering results implementing traditional graphite pencil tone rendering methods.
Pen-and-Ink for BlobTree Implicit Models
Kevin Foster, Pauline Jepp, Brian Wyvill, Mario Costa Sousa, Callum Galbraith, Joaquim A. Jorge.
Computer Graphics Forum, Vol. 24, No. 3, pp. 267--276,
2005. [BibTeX]
Precise Ink Drawing of 3D Models
Mario Costa Sousa, Kevin Foster, Brian Wyvill, Faramarz Samavati.
Computer Graphics Forum, Vol. 22, No. 3, September,
2003. [BibTeX]
Sample-Based Synthesis of Illustrative Patterns
Vladimir Alves dos Passos, Marcelo Walter, Mario Costa Sousa.
18th Pacific Conference on Computer Graphics and Applications (PG'10), pp. 109--116,
2010. [BibTeX]
Silhouette Rendering Based On Stability Measurement
John Brosz, Faramarz Samavati, Mario Costa Sousa.
Spring Conference of Computer Graphics 2004 (SCCG '04),
2004. [BibTeX]
Sketch-based modeling with few strokes
Joseph Jacob Cherlin, Faramarz Samavati, Mario Costa Sousa, Joaquim A. Jorge.
21st Spring Conference on Computer graphics (SCCG'05), pp. 137--145, Budmerice, Slovakia, May 12-14,
2005. [BibTeX]