In order to realize effective collaboration between remote places, it is necessary to achieve high presence communication in the shared space. In this study, plug-in video avatar was developed. Video avatar is a technology that supports the communication between remote users by capturing the user’s video image and integrating it in the shared virtual world. In this method, stand-alone application can be expanded to the shared space application easily by using the plug-in function. The video avatar technology was applied to the remote collaboration by synthesizing it to various applications such as visualization, collaborative design, and remote presentation. The efficiency of the communication in the remote presentation and the system performance among three sites were investigated to evaluate the effectiveness of this system.

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