IEEE Trans Image Process - Removing artefacts from color and contrast modifications.

Tópicos

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Resumo

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 nonlocal 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.

Resumo Limpo

work concern modif gray level color distribut digit imag common drawback classic method aim modif reveal artefact attenu detail textur work propos generic filter method enabl given origin imag radiometr correct one suppress artefact preserv detail approach reli key observ artefact correspond spatial irregular socal transport map defin differ origin correct imag propos method draw nonloc yaroslavski filter regular transport map effici method shown various radiometr modif contrast equal midway histogram color enhanc color transfer comparison relat approach also provid

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