06618507 is referenced by 63 patents.

This invention relates to methods of feature extraction from MPEG-2 and MPEG-4 compressed video sequences. The spatio-temporal compression complexity of video sequences is evaluated for feature extraction by inspecting the compressed bitstream and the complexity is used as a descriptor of the spatio-temporal characteristics of the video sequence. The spatio-temporal compression complexity measure is used as a matching criterion and can also be used for absolute indexing. Feature extraction can be accomplished in conjunction with scene change detection techniques and the combination has reasonable accuracy and the advantage of high simplicity since it is based on entropy decoding of signals in compressed form and does not require computationally expensive inverse Discrete Cosine Transformation (DCT).

Title
Methods of feature extraction of video sequences
Application Number
9/236838
Publication Number
6618507 (B1)
Application Date
January 25, 1999
Publication Date
September 9, 2003
Inventor
Hiroshi Ito
Fort Lee
NJ, US
Huifang Sun
Cranbury
NJ, US
Ajay Divakaran
Scotch Plains
NJ, US
Agent
Andrew Curtin
US
Dirk Brinkman
US
Assignee
Mitsubishi Electric Research Laboratories
MA, US
IPC
G06K 9/46
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