000001926 001__ 1926 000001926 005__ 20190219081244.0 000001926 037__ $$aINPRO--2008-023 000001926 041__ $$aeng 000001926 100__ $$aMartín, Miguel 000001926 245__ $$aUnderstanding exposure for reverse tone mapping 000001926 260__ $$c2008-09-03 000001926 300__ $$a9 000001926 520__ $$aHigh dynamic range (HDR) displays are capable of providing a rich visual experience by boosting both luminance and contrast beyond what conventional displays can offer.We envision that HDR capture and display hardware will soon reach the mass market and become mainstream in most fields, from entertainment to scientific visualization. This will necessarily lead to an extensive redesign of the imaging pipeline. However, a vast amount of legacy content is available, captured and stored using the traditional, low dynamic range (LDR) pipeline. The immediate question that arises is: will our current LDR digital material be properly visualized on an HDR display? The answer to this question involves the process known as reverse tone mapping (the expansion of luminance and contrast to match those of the HDR display) for which no definite solution exists. This paper studies the specific problem of reverse tone mapping for imperfect legacy still images, where some regions are under- or overexposed. First, we show the results of a psychophysical study compared with first-order image statistics, in an attempt to gain some understanding in what makes an image be perceived as incorrectly exposed; second, we propose a methodology to evaluate existing reverse tone mapping algorithms in the case of imperfect legacy content. 000001926 540__ $$9info:eu-repo/semantics/openAccess$$aEsta obra está sujeta a una licencia de uso Creative Commons. Se permite la reproducción total o parcial, la distribución, la comunicación pública de la obra y la creación de obras derivadas, siempre que no sea con finalidades comerciales, y sempre que se reconzca la autoria de la obra original.$$uhttps://creativecommons.org/licenses/by-nc/4.0/ 000001926 6531_ $$aHDR 000001926 6531_ $$ainverse tone mapping 000001926 6531_ $$areverse tone mapping 000001926 6531_ $$aexposure 000001926 6531_ $$aunderexposure 000001926 6531_ $$aoverexposure 000001926 6531_ $$aGIGA 000001926 700__ $$aFleming, Roland 000001926 700__ $$aSorkine, Olga 000001926 700__ $$aGutiérrez Pérez, Diego 000001926 773__ $$gSept. 3-5 (2008)$$hto appear$$pProceedings of CEIG$$y2008 000001926 8560_ $$fmiguelm@unizar.es 000001926 8564_ $$s2249640$$uhttps://zaguan.unizar.es/record/1926/files/INPRO--2008-023.pdf$$zArchivo asociado 000001926 980__ $$aPREPRINT