Accession Number:

ADA459805

Title:

Feature Normalization for Video Indexing and Retrieval

Descriptive Note:

Technical rept.

Corporate Author:

MARYLAND UNIV COLLEGE PARK LANGUAGE AND MEDIA PROCESSING LAB

Report Date:

1996-11-01

Pagination or Media Count:

40.0

Abstract:

Fast and efficient storage, browsing, indexing, and retrieval of video is necessary for the development of various multimedia database applications. Given that video is typically stored efficiently in a compressed format, if we can analyze the compressed representation directly, we can avoid the costly overhead of decompressing and operating at the pixel level. Compressed domain parsing of video has been presented in earlier work where key frames are identified for shots, subshots, and scenes. In this paper, we describe key frame selection, feature extraction, indexing, and retrieval techniques that are directly applicable to MPEG-compressed video. We develop a frame-type independent representation of the various types of frames present in an MPEG video in which all frames can be considered equivalent. Features are derived from the available DCT, macroblock, and motion vector information and mapped to a low-dimensional space where they can be accessed using standard database techniques. The spatial information is used as primary index while the temporal information is used to enhance the robustness of the system during the retrieval process. The techniques presented enable fast archiving, indexing, and retrieval of video. Our operational prototype typically takes a fraction of a second to retrieve similar video scenes from our database, with over 95 success.

Subject Categories:

  • Operations Research
  • Recording and Playback Devices
  • Information Science

Distribution Statement:

APPROVED FOR PUBLIC RELEASE