Share Email Print

Proceedings Paper

Restoration of an image representing a video sequence recorded under turbulence effects
Author(s): Beny Cohen; Vadim Avrin; Moshe Belitsky; Its'hak Dinstein
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

Turbulence conditions affect video images in tow ways. It causes local blur, and it distorts the geometry of the scene. A video sequence of a still scene recorded under turbulence, appears to contain local random motion of small neighborhoods in the images. The blur is an accumulated results of the imaging point spread function and the local motion. The geometric distortion is due to the fact that small neighborhoods move in different directions. The restoration scheme reported here takes care of the geometric distortion as well as the blur. The geometric distortion is reduced by averaging the gray levels of relatively long video segments. The averaging reduces the geometric distortion, but it increases the blur. The second stage is the estimation of the global point spread function. The blur in the average image is a combination of the effects of the imaging system transfer function,the turbulence, and the averaging of the sequence. The global non-isotropic point spread function is estimated based on edge responses in the average image. A Wiener filter is used for the restoration of the image. The presented experimental result are superior to the results obtained by a previously proposed majority-vote technique.

Paper Details

Date Published: 30 October 1997
PDF: 9 pages
Proc. SPIE 3164, Applications of Digital Image Processing XX, (30 October 1997); doi: 10.1117/12.279579
Show Author Affiliations
Beny Cohen, Ben-Gurion Univ. of the Negev (Israel)
Vadim Avrin, Ben-Gurion Univ. of the Negev (Israel)
Moshe Belitsky, Impro-Temed Ltd. (Israel)
Its'hak Dinstein, Ben-Gurion Univ. of the Negev and Impro-Temed Ltd. (Israel)

Published in SPIE Proceedings Vol. 3164:
Applications of Digital Image Processing XX
Andrew G. Tescher, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?