Mr. Chih-Kuo Yeh Profile

Chih-Kuo Yeh

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Proceedings Article | 25 January 2012 Paper

Animating streamlines with repeated asymmetric patterns for steady flow visualization

Chih-Kuo Yeh, Zhanping Liu, Tong-Yee Lee

Proceedings Volume 8294, 82940R (2012) https://doi.org/10.1117/12.911968

KEYWORDS: Visualization, Solid modeling, Image visualization, Wave propagation, Computer programming, Motion models, RGB color model, Temporal coherence, Image quality, Image filtering

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Animation provides intuitive cueing for revealing essential spatial-temporal features of data in scientific visualization. This paper explores the design of Repeated Asymmetric Patterns (RAPs) in animating evenly-spaced color-mapped streamlines for dense accurate visualization of complex steady flows. We present a smooth cyclic variable-speed RAP animation model that performs velocity (magnitude) integral luminance transition on streamlines. This model is extended with inter-streamline synchronization in luminance varying along the tangential direction to emulate orthogonal advancing waves from a geometry-based flow representation, and then with evenly-spaced hue differing in the orthogonal direction to construct tangential flow streaks. To weave these two mutually dual sets of patterns, we propose an energy-decreasing strategy that adopts an iterative yet efficient procedure for determining the luminance phase and hue of each streamline in HSL color space. We also employ adaptive luminance interleaving in the direction perpendicular to the flow to increase the contrast between streamlines.

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