Global brightness-fluctuation compensation in video coding

Kazuto Kamikura*, Hirohisa Jozawa, Hiroshi Watanabe, Hiroshi Kotera

*この研究の対応する著者

研究成果: Conference article査読

2 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)1285-1293
ページ数9
ジャーナルProceedings of SPIE - The International Society for Optical Engineering
3024
DOI
出版ステータスPublished - 1997 12月 1
外部発表はい
イベントVisual Communications and Image Processing '97 - San Jose, CA, United States
継続期間: 1997 2月 121997 2月 12

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • コンピュータ サイエンスの応用
  • 応用数学
  • 電子工学および電気工学

フィンガープリント

「Global brightness-fluctuation compensation in video coding」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル