Global brightness-fluctuation compensation in video coding

Kazuto Kamikura, Hirohisa Jozawa, Hiroshi Watanabe, Hiroshi Kotera

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

2 Citations (Scopus)

Abstract

A global brightness-fluctuation compensation (GBC) scheme is proposed to improve coding efficiency for video scenes that contain global brightness fluctuations caused by fade- in/out, camera-iris adjustment, and so on. In this scheme, a set of two brightness-fluctuation parameters, which represent contrast and offset components of the brightness fluctuation in the whole frame, is first estimated. The brightness fluctuation is then compensated using the parameters. Furthermore, a block-by-clock ON/OFF control method for GBC is introduced to improve coding performance even for scenes including local fluctuations in brightness caused by camera flashed, spotlights, and the like. In this method, GBC is performed only on the blocks where the sum of the squared error produced using GBC is less than that produced without GBC. Simulation results show that the proposed GBC scheme with the ON/OFF control method greatly improves coding efficiency, especially for sequences with considerable global brightness fluctuation.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Pages1285-1293
Number of pages9
Volume3024
DOIs
Publication statusPublished - 1997
Externally publishedYes
EventVisual Communications and Image Processing '97 - San Jose, CA, United States
Duration: 1997 Feb 121997 Feb 12

Other

OtherVisual Communications and Image Processing '97
CountryUnited States
CitySan Jose, CA
Period97/2/1297/2/12

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Keywords

  • Brightness-fluctuation compensation
  • Fade-in/out
  • Low bitrate coding
  • Video compression

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Kamikura, K., Jozawa, H., Watanabe, H., & Kotera, H. (1997). Global brightness-fluctuation compensation in video coding. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 3024, pp. 1285-1293) https://doi.org/10.1117/12.263208