DocumentCode :
46622
Title :
Gamut Mapping in Cinematography Through Perceptually-Based Contrast Modification
Author :
Zamir, Syed Waqas ; Vazquez-Corral, Javier ; Bertalmio, Marcelo
Author_Institution :
Dept. of Inf. & Commun. Technol., Univ. Pompeu Fabra, Barcelona, Spain
Volume :
8
Issue :
3
fYear :
2014
fDate :
Jun-14
Firstpage :
490
Lastpage :
503
Abstract :
Gamut mapping transforms the colors of an input image to the colors of a target device so as to exploit the full potential of the rendering device in terms of color rendition. In this paper we present spatial gamut mapping algorithms that rely on a perceptually-based variational framework. Our algorithms adapt a well-known image energy functional whose minimization leads to image enhancement and contrast modification. We show how by varying the importance of the contrast term in the image functional we are able to perform gamut reduction and gamut extension. We propose an iterative scheme that allows our algorithms to successfully map the colors from the gamut of the original image to a given destination gamut while keeping the perceived colors close to the original image. Both subjective and objective evaluations validate the promising results achieved via our proposed algorithms.
Keywords :
image colour analysis; image enhancement; iterative methods; rendering (computer graphics); variational techniques; cinematography; color rendition; gamut extension; gamut reduction; image energy functional; image enhancement; input image colors; iterative scheme; perceptually-based contrast modification; perceptually-based variational framework; rendering device; spatial gamut mapping algorithms; target device colors; Equations; Image color analysis; Minimization; Motion pictures; Signal processing algorithms; Steady-state; Visual systems; Gamut mapping (GM); color contrast; gamut extension (GE); gamut mapping algorithm (GMA); gamut reduction (GR); variational methods;
fLanguage :
English
Journal_Title :
Selected Topics in Signal Processing, IEEE Journal of
Publisher :
ieee
ISSN :
1932-4553
Type :
jour
DOI :
10.1109/JSTSP.2014.2313182
Filename :
6777289
Link To Document :
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