PanoramaExcerpts
Yukinobu Taniguchi, Akihito Akutsu, Yoshinobu Tonomura · 1997
Browsing is a fundamental function in multimedia systems.This paper presents PanoramaExcerpts -a video browsing interface that shows a catalogue of two types of video icons: panoramic and keyframe icons.A panoramic icon is synthesized from a video segment taken with camera pan or tilt, and extracted using a camera operation estimation technique.A keyframe icon is extracted to supplement the panoramic icons; a shot-change detection algorithm is used.A panoramic icon represents the entire visible contents of a scene extended with camera pan or tilt, which is difficult to summarize using a single keyframe.For the automatic generation of PanoramaExcerpts, we propose an approach to integrate the following: (a) a shot-change detection method that detects instantaneous cuts as well as dissolves, with adaptive control over the sampling rate for efficient processing; (b) a method for locating segments that contain smooth camera pans or tilts, from which the panoramic icons can be synthesized; and (c) a layout method for packing icons in a space-efficient manner.We also describe the experimental results of the above three methods and the potential applications of PanoramaExcerpts.