PanoramaExcerpts: Video cataloging by automatic synthesis and layout of panoramic images
Browsing is an important, function supporting efficient access to relevant information in video archives. In this paper, we present PanoramaExcerpts - a video browsing interface that shows a catalogue of two types of video icons: panoramic and keyframe icons. A panoramic icon is automatically synthesized horn a video segment taken with camera pan or tilt using a camera parameter estimation technique. One keyframe icon is extracted for each shot to supplement the panoramic icons. A panoramic icon represents the entire visible contents of a scene extended with a camera pan or tilt, which is difficult to represent using a single keyframe. A graphical representation, called camera-work trajectory, is also proposed to show the direction and the speed of camera operation. For the automatic generation of PanoramaExcerpts, we propose an approach to integrate the following: (a) a shot-change detection method; (b) a method for locating segments that contain smooth camera operations; (c) a layout method. for packing icons in a space-efficient manner. In this paper, we mainly describe (b) and (c) with experimental results.
panoramic image video handling video browsing video analysis image mosaic