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| HAL : hal-00505966, version 2 |
| Fiche détaillée |  Récupérer au format |
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| Versions disponibles : | v1 (26-07-2010) | v2 (09-02-2011) |
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| Artefact-free color and contrast modification |
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| Julien Rabin 1Julie Delon 2 |
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| (23/07/2010) |
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| 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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| 1 : | Centre de Mathématiques et de Leurs Applications (CMLA) |
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CNRS : UMR8536 – École normale supérieure de Cachan - ENS Cachan |
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| 2 : | Laboratoire traitement et communication de l'information (LTCI) |
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CNRS : UMR5141 – Institut Télécom – Télécom ParisTech |
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| Domaine | : | Sciences de l'ingénieur/Traitement du signal et de l'image Informatique/Traitement des images Informatique/Traitement du signal et de l'image |
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| contrast modification – color transfer – contrast adjustment – contrast equalization – histogram specification – optimal transportation – image regularization – artefact-free. |
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| Liste des fichiers attachés à ce document : | |||||
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| hal-00505966, version 2 | |
| http://hal.archives-ouvertes.fr/hal-00505966 | |
| oai:hal.archives-ouvertes.fr:hal-00505966 | |
| Contributeur : Julien Rabin | |
| Soumis le : Mercredi 9 Février 2011, 11:27:00 | |
| Dernière modification le : Mercredi 9 Février 2011, 17:07:57 | |
