Non-Photorealistic Computer Graphics Library

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Found 5 item(s) authored by "Youngha Chang" Find Author on Google.

Article Curvature-based stroke rendering
Suguru Saito, Akane Kani, Youngha Chang, Masayuki Nakajima.
The Visual Computer, Vol. 24, No. 1, pp. 1--11, 2008. [BibTeX]

Proceedings Example-based color stylization based on categorical perception
Youngha Chang, Keiji Uchikawa, Suguru Saito, Masayuki Nakajima.
1st Symposium on Applied perception in graphics and visualization, pp. 91--98, ACM Press, 2004. [BibTeX]

Article Example-Based Color Stylization of Images

Author(s): Youngha Chang, Suguru Saito, Keiji Uchikawa, Masayuki Nakajima.
Article: ACM Transactions on Applied Perception (TAP), Vol. 2, No. 3, pp. 322--345, July, 2005.
[BibTeX] [DOI] Find this paper on Google

Abstract:
We describe a new computational approach to stylize the colors of an image by using a reference image. During processing, we take the characteristics of human color perception into account to generate more appealing results. Our system starts by classifying each pixel value into one of the basic color categories, derived from our psychophysical experiments. The basic color categories are perceptual categories that are universal to everyone, regardless of nationality or cultural background. These categories are used to provide restrictions on color transformations to avoid generating unnatural results. Our system then renders a new image by transferring colors from a reference image to the input image, based on these categorizations. To avoid artifacts due to the explicit clustering, our system defines fuzzy categorization when pseudocontours appear in the resulting image. We present a variety of results and show that our method performs a large, yet natural, color transformation without any sense of incongruity and that the resulting images automatically capture the characteristics of the colors used in the reference image.

Proceedings Example-based color transformation for image and video
Youngha Chang, Suguru Saito, Masayuki Nakajima.
3rd International Conference on Computer Graphics and Interactive Techniques in Australasia and South East Asia (GRAPHITE'05), pp. 347--353, Dunedin, New Zealand, 2005. [BibTeX]

Proceedings Generation of Varying Line Thickness
Suguru Saito, Akane Kani, Youngha Chang, Masayuki Nakajima.
Computer Graphics International, pp. 294, Tokyo, Japan, July 09 - 11, 2003. [BibTeX]

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