文章基本信息

标题：スーパーハイビジョン用二重変調方式広ダイナミックレンジプロジェクタ
本地全文：下载
作者：日下部裕一 ; 金澤勝 ; 野尻裕司等
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：2011
卷号：65
期号：7
页码：1045-1056
DOI：10.3169/itej.65.1045
出版社：The Institute of Image Information and Television Engineers
摘要：We have developed a projector which can display high-resolution images of Super Hi-Vision (7680 x 4320pixels) and has a high dynamic range of 1.1 million to 1. This projector features a serial combination of two modulation blocks: the first for chrominance and the second for luminance. While a conventional projector has one modulation block that contains three devices to modulate red, green, and blue light, our projector has another modulation block that contains a device for luminance to further modulate the combined RGB modulated light. We measured some characteristics of the projector, which are modulation transfer function, dynamic range, and tone reproduction. We found that the projector can resolve Super Hi-Vision images and that it has an extremely high dynamic range and a fine 12-bit tone reproduction. We did two types of subjective evaluations with the projector to research the effect of the resolution of the chrominance component and that of the limited dynamic range of the display on the total image quality. The results of the first evaluation indicate viewers do not notice the image degradation when the resolution of the chrominance component is degraded to a half of that of the luminance component. The results of the second evaluation indicate the dynamic range of at least 1000:1 is necessary for displaying natural images and the dynamic range of about 30000:1 is necessary for displaying special images which have low average picture levels.
关键词：スーパーハイビジョン;広ダイナミックレンジ;二重変調;MTF;階調;画質評価