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Artefact-free color and contrast modification

Abstract : This work is concerned with the modification of the gray level or color distribution of digital images. A common drawback of classical methods aiming at such modifications is the revealing of artefacts or the attenuation of details and textures. In this work we propose a generic filtering method enabling, given the original image and the radiometrically corrected one, to suppress artefacts while preserving details. The approach relies on the key observation that artefacts correspond to spatial irregularity of the so-called "transportation map", defined as the difference between the original and the corrected image. The proposed method draws on the non-local Yaroslavsky filter to regularize the transportation map. The efficiency of the method is shown on various radiometric modifications: contrast equalization, midway histogram, color enhancement and color transfer. A comparison with related approaches is also provided.
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Contributeur : Julien Rabin Connectez-vous pour contacter le contributeur
Soumis le : mercredi 9 février 2011 - 11:27:00
Dernière modification le : mardi 18 janvier 2022 - 15:28:04
Archivage à long terme le : : jeudi 30 mars 2017 - 06:44:30


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Julien Rabin, Julie Delon, Yann Gousseau. Artefact-free color and contrast modification. IEEE Transactions on Image Processing, Institute of Electrical and Electronics Engineers, 2011, 20 (11), ⟨10.1109/TIP.2011.2142318⟩. ⟨hal-00505966v2⟩



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