Non-Photorealistic Computer Graphics Library

A Unified Scheme for Adaptive Stroke-based Rendering

Author(s): Hyung Woo Kang, Charles K. Chui, Uday K. Chakraborty.
Article: The Visual Computer: International Journal of Computer Graphics, Vol. 22, No. 9, pp. 814--824, 2006.
[BibTeX] [DOI]

Abstract:
This paper presents a comprehensive scheme for automatically generating a broad class of artistic illustrations from photographs. Using strokes as the major building blocks, our system optimizes the stroke attributes subject to the desired rendering style. The stroke attributes are computed adaptively to enable importance-based control of the abstraction level at each pixel. We propose a novel outline detection and refinement paradigm called 'edge painting' to construct an outline map, and from which to derive the pixel-wise importance. We also introduce an 'adaptive bilateral filter' to adaptively guide the curved stroke directions based on the importance map. Given the outline, importance, and direction maps, the system creates the illustration via selecting the representative colors, setting the style parameters, and optimizing the stroke attributes based on simulated annealing. The experimental results show that our scheme facilitates automatic production of artistic illustrations in a wide range of rendering styles.