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Contrast image correction method

[+] Author Affiliations
Raimondo Schettini

Università degli Studi di Milano-Bicocca, Dipartimento di Informatica, Sistemistica e Comunicazione, Viale Sarca 336, 20126 Milano, Italy

Francesca Gasparini

Università degli Studi di Milano-Bicocca, Dipartimento di Informatica, Sistemistica e Comunicazione, Viale Sarca 336, 20126 Milano, Italy

Silvia Corchs

Università degli Studi di Milano-Bicocca, Dipartimento di Informatica, Sistemistica e Comunicazione, Viale Sarca 336, 20126 Milano, Italy

Fabrizio Marini

Università degli Studi di Milano-Bicocca, Dipartimento di Informatica, Sistemistica e Comunicazione, Viale Sarca 336, 20126 Milano, Italy

Alessandro Capra

STMicroelectronics Catania, Advanced System Technology—Catania Lab, Italy

Alfio Castorina

STMicroelectronics Catania, Advanced System Technology—Catania Lab, Italy

J. Electron. Imaging. 19(2), 023005 (April 15, 2010). doi:10.1117/1.3386681
History: Received July 28, 2009; Revised January 11, 2010; Accepted March 02, 2010; Published April 15, 2010; Online April 15, 2010
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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.

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© 2010 SPIE and IS&T

Citation

Raimondo Schettini ; Francesca Gasparini ; Silvia Corchs ; Fabrizio Marini ; Alessandro Capra, et al.
"Contrast image correction method", J. Electron. Imaging. 19(2), 023005 (April 15, 2010). ; http://dx.doi.org/10.1117/1.3386681


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