Removing Artefact From Color and Contrast Modifications
Gousseau, Yann; Delon, Julie; Rabin, Julien (2011), Removing Artefact From Color and Contrast Modifications, IEEE Transactions on Image Processing, 20, 11, p. 3073-3085. http://dx.doi.org/10.1109/TIP.2011.2142318
TypeArticle accepté pour publication ou publié
External document linkhttp://hal.archives-ouvertes.fr/hal-00505966/fr/
Journal nameIEEE Transactions on Image Processing
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Abstract (EN)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.
Subjects / Keywordsartefact-free; image regularization; optimal transportation; histogram specification; contrast equalization; contrast adjustment; color transfer; contrast modification
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