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Ju-Chun Ko


Publications by Ju-Chun Ko (bibliography)

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Ko, Ju-Chun, Chan, Li-Wei and Hung, Yi-Ping (2010): Public issues on projected user interface. In: Proceedings of ACM CHI 2010 Conference on Human Factors in Computing Systems 2010. pp. 2873-2882. http://doi.acm.org/10.1145/1753846.1753874

What will happen when pocket projectors become mainstream personal display channels? What will be affected when numerous projections intrude our living space without proper control? Today's technology in projection has promised a big screen viewing experience from mobile devices, pushing us toward a truly ubiquitous display environment. But, is our society prepared for the next projection-generation? We argue that the Projected user interface (PUI) will introduce new problems both in environmental and social aspects which are seldom been explored. This paper explores our rights to project and be projected in public space. Can we project on human body without asking for permission? Can we refuse to be projected? Can projection pollute the environment and influence the people therein? This paper proposes several issues about people's rights on projection, and provide discussions on possible solutions.

© All rights reserved Ko et al. and/or their publisher

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Chan, Li-Wei, Wu, Hsiang-Tao, Kao, Hui-Shan, Ko, Ju-Chun, Lin, Home-Ru, Chen, Mike Y., Hsu, Jane and Hung, Yi-Ping (2010): Enabling beyond-surface interactions for interactive surface with an invisible projection. In: Proceedings of the 2010 ACM Symposium on User Interface Software and Technology 2010. pp. 263-272. http://doi.acm.org/10.1145/1866029.1866072

This paper presents a programmable infrared (IR) technique that utilizes invisible, programmable markers to support interaction beyond the surface of a diffused-illumination (DI) multi-touch system. We combine an IR projector and a standard color projector to simultaneously project visible content and invisible markers. Mobile devices outfitted with IR cameras can compute their 3D positions based on the markers perceived. Markers are selectively turned off to support multi-touch and direct on-surface tangible input. The proposed techniques enable a collaborative multi-display multi-touch tabletop system. We also present three interactive tools: i-m-View, i-m-Lamp, and i-m-Flashlight, which consist of a mobile tablet and projectors that users can freely interact with beyond the main display surface. Early user feedback shows that these interactive devices, combined with a large interactive display, allow more intuitive navigation and are reportedly enjoyable to use.

© All rights reserved Chan et al. and/or their publisher

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