Share Email Print
cover

Proceedings Paper

Global brightness-fluctuation compensation in video coding
Author(s): Kazuto Kamikura; Hirohisa Jozawa; Hiroshi Watanabe; Hiroshi Kotera
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper 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.

Paper Details

Date Published: 10 January 1997
PDF: 9 pages
Proc. SPIE 3024, Visual Communications and Image Processing '97, (10 January 1997); doi: 10.1117/12.263208
Show Author Affiliations
Kazuto Kamikura, NTT Human Interface Labs. (Japan)
Hirohisa Jozawa, NTT Human Interface Labs. (Japan)
Hiroshi Watanabe, NTT Human Interface Labs. (Japan)
Hiroshi Kotera, NTT Human Interface Labs. (Japan)


Published in SPIE Proceedings Vol. 3024:
Visual Communications and Image Processing '97
Jan Biemond; Edward J. Delp, Editor(s)

© SPIE. Terms of Use
Back to Top