Global brightness-fluctuation compensation in video coding

Kazuto Kamikura, Hirohisa Jozawa, Hiroshi Watanabe, Hiroshi Kotera

Research output: Contribution to journalConference article

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
Pages (from-to)1285-1293
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume3024
DOIs
Publication statusPublished - 1997 Dec 1
Externally publishedYes
EventVisual Communications and Image Processing '97 - San Jose, CA, United States
Duration: 1997 Feb 121997 Feb 12

Keywords

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

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Global brightness-fluctuation compensation in video coding'. Together they form a unique fingerprint.

  • Cite this