Naslov
Foveated mean squared error — a novel video quality metric

Autori
Rimac-Drlje, Snježana ; Vranješ, Mario ; Žagar, Drago

Izvornik
Multimedia tools and applications (1380-7501) 49 (2010), 3; 425-445

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
foveated vision; retinal image velocity; spatio-temporal activity; subjective quality assessment; video quality metric

Sažetak
Efficiency of a video coding process, as well as accuracy of an objective video quality evaluation can be significantly improved by introduction of the human visual system (HVS) characteristics. In this paper we analyze one of these characteristics ; namely, visual acuity reduction due to the foveated vision and object movements in a video sequence. We propose a new video quality metric called Foveated Mean Squared Error (FMSE) that takes into account a variable resolution of the HVS across the visual field. The highest visual acuity is at the point of fixation that falls into fovea, an area at retina with the highest density of photoreceptors. Visual acuity decreases rapidly for image regions which are further with respect to the fixation point. FMSE also utilizes the effect of additional spatial acuity reduction due to motion in a video sequence. The quality measures calculated by FMSE have shown a high correlation with experimental results obtained by subjective video quality assessment.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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