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authors Ishii, Hiroshi and Kobayashi, Minoru
year 1992
title ClearBoard: A Seamless Medium for Shared Drawing and Conversation with Eye Contact Systems for Media-Supported Collaboration
source Proceedings of ACM CHI'92 Conference on HumanFactors in Computing Systems 1992 pp. 525-532
summary This paper introduces a novel shared drawing medium called ClearBoard. It realizes (1) a seamless shared drawing space and (2) eye contact to support realtime and remote collaboration by two users. We devised the key metaphor: "talking through and drawing on a transparent glass window" to design ClearBoard. A prototype of ClearBoard is implemented based on the "Drafter-Mirror" architecture. This paper first reviews previous work on shared drawing support to clarify the design goals. We then examine three metaphors that fulfill these goals. The design requirements and the two possible system architectures of ClearBoard are described. Finally, some findings gained through the experimental use of the prototype, including the feature of "gaze awareness", are discussed.
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