Auto-focus system for video camera,申请号US19920985450-传众专利搜索

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发明名称	Auto-focus system for video camera
摘要	A focus detection signal is generated from the video signal produced by a video camera by deriving higher frequency components of that video signal, detecting when those higher frequency components exceed a minimum threshold level, sensing when the video signal exceeds a maximum threshold, and integrating those higher frequency components which exceed the minimum threshold, except during an interval when the video signal exceeds the maximum threshold, thereby producing the focus detection signal.
申请公布号	US5235428(A)	申请公布日期	1993.08.10
申请号	US19920985450	申请日期	1992.12.03
申请人	SONY CORPORATION	发明人	HIROTA, KATSUAKI;KIKUCHI, AKIHIRO;KONDO, TOSHIHARU;KOHASHI, TAKASHI;KATO, FUMIAKI
分类号	H04N5/232	主分类号	H04N5/232
代理机构		代理人
主权项
地址

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