TRACKING-OPTIMIZED QUANTIZATION FOR H.264 COMPRESSION IN TRANSPORTATION VIDEO SURVEILLANCE APPLICATIONS

E. Soyak, S. A. Tsaftaris, A. K. Katsaggelos

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We propose a tracking-aware system that removes video components of low tracking interest and optimizes the quantization during compression of frequency coefficients, particularly those that most influence trackers, significantly reducing bitrate while maintaining comparable tracking accuracy. We utilize tracking accuracy as our compression criterion in lieu of mean squared error metrics. The process of optimizing quantization tables suitable for automated tracking can be executed online or offline. The online implementation initializes the encoding procedure for a specific scene, but introduces delay. On the other hand, the offline procedure produces globally optimum quantization tables where the optimization occurs for a collection of video sequences. Our proposed system is designed with low processing power and memory requirements in mind, and as such can be deployed on remote nodes. Using H.264/AVC video coding and a commonly used state-of-the-art tracker we show that while maintaining comparable tracking accuracy our system allows for over 50% bitrate savings on top of existing savings from previous work.

Original languageEnglish
Title of host publication2011 18TH IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP)
Place of PublicationNEW YORK
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages153-156
Number of pages4
Publication statusPublished - 2011
Event18th IEEE International Conference on Image Processing (ICIP) - Brussels, Belgium
Duration: 11 Sep 201114 Sep 2011

Publication series

NameIEEE International Conference on Image Processing ICIP
PublisherIEEE
ISSN (Print)1522-4880

Conference

Conference18th IEEE International Conference on Image Processing (ICIP)
CountryBelgium
Period11/09/1114/09/11

Keywords

  • Urban traffic video tracking
  • transportation
  • video compression
  • quantization
  • preprocessing
  • postprocessing

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