文章基本信息

标题：スーパーハイビジョンカメラ用フォーカス補助信号
本地全文：下载
作者：船津良平 ; 山下誉行 ; 三谷公二等
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：4
页码：531-539
DOI：10.3169/itej.65.531
出版社：The Institute of Image Information and Television Engineers
摘要：In the current Super Hi-Vision (SHV) camera system, a camera operator has difficulty in finding the best focus because the resolution of SHV video is extremely high compared to that of the viewfinder (VF). Therefore, a video engineer adjusts the lens focus on a high-resolution monitor on a remote site. We propose a focus-aid signal that enables a low-resolution VF to be used to focus the SHV. The signal is generated from the high spatial frequency components of an SHV video and mixed with an VF video. We first discuss the difficulty of focusing the SHV camera on the basis of the MTF calculation including the lens defocus. We then simulated the focus-aid signal generation by using an SHV video and evaluated the property of the generated signal. We finally developed a prototype focus-aid signal generator and the results of our experiments show that the signal provided good focus in an SHV system.
关键词：スーパーハイビジョン;カメラ;フォーカス調整;ビューファインダ;MTF