This paper presents interactive techniques for visually annotating independently moving objects in a video stream. Features in the video are automatically tracked and grouped in an off-line preprocess that enables later interactive manipulation and annotation. Examples of such annotations include speech and thought balloons, video graffiti, hyperlinks, and path arrows. Our system also employs a direct-manipulation interface for random frame access using spatial constraints. This annotation interface can be employed in a variety of applications including surveillance, film and video editing, visual tagging, and authoring rich media such as hyperlinked video.
Technical Report UW-CSE-2007-04-01 (2MB PDF)
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