Previewing Video Data: Browsing Key Frames at High Rates Using A Video Slide Show Interface

Wei Ding Marchionini, Gary Tse, Tony

International Symposium on Research, Development and Practice in Digital Libraries / .
(ReLIS:jul:juljit:8444)

Abstract:

As the amount of video data in digital libraries increases, support for fast and easy access to this information has become necessary. Our approach is to empower users with direct control of video surrogates and provide interaction flexibility. A video browsing interface prototype using a slide show-style presentation of video key frames was built and tested for user performance and subjective satisfaction. The interface allows display rates to be adjusted interactively. Subjects in this preliminary study performed two browsing-related tasks, object identification and gist determination, at display rates of 1, 4, 8, 12, and 16 key frames per second (kfps). A possible functional limit in accuracy for object identification (OI) was detected between 8 to 12 kfps. Performance for gist determination (GD) tended to degrad with increased display rates. However, no significant performance differences were detected. Furthermore, it was observed that lower rates were required for object identification than for gist determination. Suggestions for designing fast video browsing interfaces are provided.

Creation: 1997
Keywords: Video ; Visualización ; Interfaces

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