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Auto-focus system for video camera 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • H04N-005/232
  • H04N-005/225
출원번호 US-0985450 (1992-12-03)
우선권정보 JP-0040814 (1990-02-21); JP-0040815 (1990-02-21)
발명자 / 주소
  • Hirota Katsuaki (Kanagawa JPX) Kikuchi Akihiro (Chiba JPX) Kondo Toshiharu (Kanagawa JPX) Kohashi Takashi (Chiba JPX) Kato Fumiaki (Chiba JPX)
출원인 / 주소
  • Sony Corporation (Tokyo JPX 03)
인용정보 피인용 횟수 : 139  인용 특허 : 0

초록 ▼

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 integ

대표청구항 ▼

A method of generating a focus detection signal from a video signal produced by a video camera, comprising the steps of: deriving higher frequency components of said video signal; detecting signal levels of said higher frequency components which exceed a minimum threshold to produce a detected signa

이 특허를 인용한 특허 (139)

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