IEEE Trans Image Process - Modeling the subjective quality of highly contrasted videos displayed on LCD with local backlight dimming.

Tópicos

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Resumo

Local backlight dimming is a technology aiming at both saving energy and improving visual quality on television sets. As the rendition of the image is specified locally, the numerical signal corresponding to the displayed image needs to be computed through a model of the display. This simulated signal can then be used as input to objective quality metrics. The focus of this paper is on determining which characteristics of locally backlit displays influence quality assessment. A subjective experiment assessing the quality of highly contrasted videos displayed with various local backlight-dimming algorithms is set up. Subjective results are then compared with both objective measures and objective quality metrics using different display models. The first analysis indicates that the most significant objective features are temporal variations, power consumption (probably representing leakage), and a contrast measure. The second analysis shows that modeling of leakage is necessary for objective quality assessment of sequences displayed with local backlight dimming.

Resumo Limpo

local backlight dim technolog aim save energi improv visual qualiti televis set rendit imag specifi local numer signal correspond display imag need comput model display simul signal can use input object qualiti metric focus paper determin characterist local backlit display influenc qualiti assess subject experi assess qualiti high contrast video display various local backlightdim algorithm set subject result compar object measur object qualiti metric use differ display model first analysi indic signific object featur tempor variat power consumpt probabl repres leakag contrast measur second analysi show model leakag necessari object qualiti assess sequenc display local backlight dim

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