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Well-produced videos provide a convenient and effective way to archive lectures. In this article, we offer a new way to create lecture videos that retains many of the advantages of well-composed recordings, without the cost and intrusion of a video production crew. We present an automated system called <i>Virtual Videography</i> that employs the art of(More)
Rapid advances in technology and decreasing costs have made it possible to attach high resolution video cameras to just about any computer and record the interactions in a lecture room. Additionally, lecture rooms may be outfitted with several cameras for this purpose. However, recording the interactions alone does not create effective video. In this paper(More)
There are a significant number of events that happen on a regular basis that would be worth preserving on video but for which it is impractical to use traditional video production methods. In this paper, we describe one possible way to inexpensively and unobtrusively capture and produce video in a classroom lecture environment. We discuss the importance of(More)
We present a hybrid speaker tracking scheme based on a single pan/tilt/zoom (PTZ) camera in an automated lecture capturing system. Given that the camera's video resolution is higher than the required output resolution, we frame the output video as a sub-region of the camera's input video. This allows us to track the speaker both digitally and mechanically.(More)
Using a marker or chalkboard allows spontaneity during a presentation or discussion. However, this spontaneity comes at the cost of incorporating visual effects, such as those associated with a computer generated presentation, into the board based presentation. Our goal is to combine the spontaneity of board based presentations with the effects and benefits(More)
The overhead and computer projectors have become an essential element to the classroom and corporate settings. Users of web−based classes and conferences would like to have access to the projector tools. The bandwidth required to transmit these projections is too large to be useful. This paper proposes a framework for processing images displayed by overhead(More)
We present methods for comparing and performing similarity queries for gene-expression time-series data. Such data is usually gathered via microarrays or related technologies. In the studies with which we work, the methods are used to compare the gene activity of mice after exposure to different treatments, or with specific genes knocked out. This lets us(More)