文章基本信息

标题：シミュレーション画像を用いた主観評価に基づく新規な階調評価指標の提案
本地全文：下载
作者：久武雄三 ; 小尾正樹 ; 伊藤秀樹等
期刊名称：映像情報メディア学会誌
印刷版ISSN：1342-6907
电子版ISSN：1881-6908
出版年度：2006
卷号：60
期号：9
页码：1410-1415
DOI：10.3169/itej.60.1410
出版社：The Institute of Image Information and Television Engineers
摘要：The patience limit (PL) and just noticeable difference (JND) of various grayscale viewing angle characteristics were evaluated subjectively using simulated images. Ten test subjects evaluated four types of picture images. Each type consisted of eight different images; two kinds of reverse images, three kinds of black crushing images, and three kinds of white omission images. All the images had several grayscale difference levels. The results showed that the concernments depend not only on the kind of pictures but also significantly on the images. We propose a new evaluation criterion, criterion grayscale difference odiousness (CGDO) value, for evaluating grayscale viewing angle characteristics. The value is calculated integrating the gamma-curve shape and the difference in the grayscale level from the original one. In our results, the CGDO values at PL and JND are about 2.0 and 0.5, respectively. Therefore the CGDO values shall be 2.0 or less, and should be 0.5 or less for ideal TFT-LCD legibility.
关键词：γ特性;視野角;主観評価;GDO;CGDO