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Journal of Electronic Imaging

Contrast image correction method
Author(s): Raimondo Schettini; Francesca Gasparini; Silvia Corchs; Fabrizio Marini; Alessandro Capra; Alfio Castorina
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Paper Abstract

A method for contrast enhancement is proposed. The algorithm is based on a local and image-dependent exponential correction. The technique aims to correct images that simultaneously present overexposed and underexposed regions. To prevent halo artifacts, the bilateral filter is used as the mask of the exponential correction. Depending on the characteristics of the image (piloted by histogram analysis), an automated parameter-tuning step is introduced, followed by stretching, clipping, and saturation preserving treatments. Comparisons with other contrast enhancement techniques are presented. The Mean Opinion Score (MOS) experiment on grayscale images gives the greatest preference score for our algorithm.

Paper Details

Date Published: 1 April 2010
PDF: 11 pages
J. Electron. Imaging. 19(2) 023005 doi: 10.1117/1.3386681
Published in: Journal of Electronic Imaging Volume 19, Issue 2
Show Author Affiliations
Raimondo Schettini, Univ. degli Studi di Milano-Bicocca (Italy)
Francesca Gasparini, Univ. degli Studi di Milano-Bicocca (Italy)
Silvia Corchs, Univ. degli Studi di Milano-Bicocca (Italy)
Fabrizio Marini, Univ. degli Studi di Milano-Bicocca (Italy)
Alessandro Capra, STMicroelectronics (Italy)
Alfio Castorina, STMicroelectronics (Italy)


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