Non-Photorealistic Computer Graphics Library

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Found 4 item(s) authored by "Charles K. Chui" Find Author on Google.

Article A Unified Scheme for Adaptive Stroke-based Rendering
Hyung Woo Kang, Charles K. Chui, Uday K. Chakraborty.
The Visual Computer: International Journal of Computer Graphics, Vol. 22, No. 9, pp. 814--824, 2006. [BibTeX]

Proceedings Coherent Line Drawing
Henry Kang, Seungyong Lee, Charles K. Chui.
5th International Symposium on Non-Photorealistic Animation (NPAR'07), 2007. [BibTeX]

Article Flow-Based Image Abstraction
Henry Kang, Seungyong Lee, Charles K. Chui.
IEEE Transactions on Visualization and Computer Graphics, Vol. 15, No. 1, pp. 62--76, 2009. [BibTeX]

Proceedings Interactive Sketch Generation

Author(s): Hyung Woo Kang, Wenjie He, Charles K. Chui, Uday K. Chakraborty.
Proceedings: 13th Pacific Conference on Computer Graphics and Applications (PG'05), 2005.
[BibTeX] Find this paper on Google

In this paper, we propose an interactive system for generating artistic sketches from images, based on stylized multiresolution B-spline curve model and livewire contour tracing paradigm. Our multiresolution B-spline stroke model allows interactive and continuous control of style and shape of the stroke at any level of details. Especially, we introduce a novel mathematical paradigm called wavelet frame to provide essential properties for multiresolution stroke editing, such as feature point preservation, locality, time-efficiency, good approximation, etc. The livewire stroke map construction leads the user-guided stroke to automatically lock on to the target contour, allowing fast and accurate sketch drawing. We classify the target contours as outlines and interior flow, and develop two respective livewire techniques based on extended graph structure and vector flow field. Experimental results show that the proposed system facilitates quick and easy generation of artistic sketches of various styles.

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