[발표논문] 일반 장면의 정규분포 분석을 기반으로 한 화질 측정 모형

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caudsil
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2017-10-16 08:22
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95
일반 장면의 정규분포 분석을 기반으로 한 화질 측정 모형
- 감성과학, Vol.16, No.3, pp.373-386, September 2013

저자 : 박형주, 하동환


Abstract
In this research, we specify the image consumers' preferred image quality ranges based on objective image
quality evaluation factors and follow a method which measures preference of the natural image scenes. In other words, according to No-Reference, we select dynamic range, color, and contrast as factors of image quality
measurements. For collecting sample images, we choose the preferred 200 landscapes which have over 30
recommendations by image consumers on the internet photo gallery. According to the scores of three objective factors of image quality measurements, the final expected score which means the image quality preference is measured and its total score is 100 points. In the main test, the actual image sample shows dynamic range 10 stop, LAB mean value L:54.7, A:2.96, B:-15.84, and RSC contrast 376.9. Total 200 image samples' normal distribution z value represents in dynamic range 0.21, LAB mean value L:0.15, A:0.38, B:0.13, and RSC contrast 0.08. In the standard normal distribution table, we can convert the z value as a percentage; dynamic range is 8.32%, LAB mean value is L:5.96%, A:14.8%, B:5.17%, and RSC contrast is 3.19%. And then, we convert the percentage values into the scores of 100; dynamic range is 91.68, LAB mean value is 91.36, and RSC contrast is 96.81. Therefore, we can conclude that the sample image's total mean score is 94.99 based on three objective image quality factors. Throughout our proposed image quality assessment model, we can measure the preference value of natural scenes. Also, we can specify the preferred image quality representation ranges and measure the expected image quality preference.

Key words : Image quality assessment, Dynamic range, Color, Contrast, Preference