Non-Photorealistic Computer Graphics Library

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Found 8 item(s) authored by "Oleg Veryovka" Find Author on Google.

Proceedings Animation with Threshold Textures
Oleg Veryovka.
Graphics Interface (GI'02), 2002. [BibTeX]

Proceedings Comprehensive Halftoning of 3D Scenes

Author(s): Oleg Veryovka, John W. Buchanan.
Proceedings: Skiggraph '99, 1999.
[BibTeX] Find this paper on Google

Abstract:
The display of images on binary output hardware requires a halftoning step. Conventional halftoning algorithms approximate image values independently from the image content and often introduce artificial texture that obscures fine details. The objective of this research is to adapt a halftoning technique to 3D scene information and thus to enhance the display of computer generated 3D scenes. Our approach is based on the control of halftoning texture by the combination of ordered dithering and error diffusion techniques. We extend our previous work and enable a user to specify the shape, scale, direction, and contrast of the halftoning texture using an external buffer. We control texture shape by constructing a dither matrix from an arbitrary image or a procedural texture. Texture direction and scale are adapted to the external information by the mapping function. Texture contrast and the accuracy of tone reproduction are varied across the image using the error diffusion process. We halftone images of 3D scenes by using the geometry, position, and illumination information to control the halftoning texture. Thus, the texture provides visual cues and can be used to enhance the viewer’s comprehension of the display.

Proceedings Edge enhancement issues in halftoning
John W. Buchanan, Lisa M. Streit, Oleg Veryovka.
Graphics Interface (GI'98), pp. 209--216, 1998. [BibTeX]

Proceedings Halftoning with Image-Based Dither Screens
Oleg Veryovka, John W. Buchanan.
Graphics Interface (GI'99), 1999. [BibTeX]

Proceedings Non-photorealistic Rendering Using an Adaptive Halftoning Technique
Lisa M. Streit, Oleg Veryovka, John W. Buchanan.
Skiggraph '99, 1999. [BibTeX]

Proceedings Pen-and-ink textures for real-time rendering
Jennifer Fung, Oleg Veryovka.
Graphics Interface (GI'03), 2003. [BibTeX]

PhD Thesis Texture Control in Digital Halftoning
Oleg Veryovka.
University of Alberta, 1999. [BibTeX]

In Collection Theory and Practice of Non-Photorealistic Graphics: Algorithms, Methods, and Production Systems
Brett Achorn, Daniel Teece, M. Sheelagh T. Carpendale, Mario Costa Sousa, David Ebert, Bruce Gooch, Victoria Interrante, Lisa M. Streit, Oleg Veryovka.
Siggraph 2003, ACM Press, 2003. [BibTeX]

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