Browsing by Author "Chen, Hsuan"

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ANIMATING PICTURES USING PROCEDURAL 2.5D WATER FLOW SIMULATION
(2017-01-01)
Sun, Tsai-Ho
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Tseng, Yi-Chun
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Wong, Sai-Keung
;
Chen, Hsuan
;
Tsai, Tsung-Yu
In this paper, we present a procedural 2.5D water flow simulation technique to animate pictures. For a given picture, we convert it into a 2.5D structure and then perform water simulation for the 2.5D structure (like a shallow-relief sculpture). The proposed approach is divided into three phases: image processing, water simulation and rendering. First, we extract the objects in the picture and compute their 2.5D structure based on image processing techniques. Second, a procedural based approach is adopted to simulate water flows over the 2.5D structure. Finally, we apply a simple ray tracer to render final images. Experimental results show that the simulated water flows naturally over the 2.5D structure of the pictures at real time rates. We also printed out the 2.5D structures of the virtual objects as 3D models for visual comparison.
Transporting objects by multiagent cooperation in crowd simulation
(2018-05-01)
Chen, Hsuan
;
Wong, Sai-Keung
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資訊工程學系
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Department of Computer Science
This paper focuses on simulating agents transporting passive objects in a virtual environment with pedestrians. The agents adopt the pushing manipulation patterns to transport the passive objects. We propose techniques to achieve two kinds of cooperation. First, the agents transport the passive objects to the goal positions. During the transportation process, the agents may adjust their formation to transport the passive objects effectively. Second, the agents avoid collision with each other and passive objects in an unfreezing manner. Experiment results show that our technique avoids the freezing problem while the agents are transporting multiple objects.