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http://dx.doi.org/10.5392/JKCA.2013.13.01.009

Optimum Parameter Ranges on Highly Preferred Images: Focus on Dynamic Range, Color, and Contrast  

Park, Hyung-Ju (중앙대학교 첨단영상대학원 영상학과)
Har, Dong-Hwan (중앙대학교 첨단영상대학원 영상학과)
Publication Information
The Journal of the Korea Contents Association / v.13, no.1, 2013 , pp. 9-18 More about this Journal
Abstract
In order to measure the parameters of consumers' preferred image quality, this research suggests image quality assessment factors; dynamic range, color, and contrast. They have both physical image quality factors and psychological characteristics from the previous researches. We found out the specific ranges of preferred image quality metrics. As a result, Digital Zone System meant for dynamic range generally shows 6~10 stop ranges in portrait, nightscape, and landscape. Total RGB mean values represent in portrait (67.2~215.2), nightscape (46~142), and landscape (52~185). Portrait total RGB averages have the widest range, landscape, and nightscape, respectively. Total scene contrast ranges show in portrait (196~589), nightscape (131~575), and landscape (104~767). Especially in portrait, skin tone RGB mean values are in ZONE V as the exposure standard, but practically image consumers' preferred skin tone level is in ZONE IV. Also, total scene versus main subject contrast ratio represents 1:1.2; therefore, we conclude that image consumers prefer the out-of-focus effect in portrait. Throughout this research, we can measure the preferred image quality metrics ranges. Also, we expect the practical and specific dynamic range, color, and contrast information of preferred image quality to positively influence product development.
Keywords
Image Quality Assessement; Dynamic Range; Color; Contrast; Preference;
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