ES2012229A6 - Enfoque automatico segun demanda accionado solo por la informacion de escena. - Google Patents

Enfoque automatico segun demanda accionado solo por la informacion de escena.

Info

Publication number
ES2012229A6
ES2012229A6 ES8900168A ES8900168A ES2012229A6 ES 2012229 A6 ES2012229 A6 ES 2012229A6 ES 8900168 A ES8900168 A ES 8900168A ES 8900168 A ES8900168 A ES 8900168A ES 2012229 A6 ES2012229 A6 ES 2012229A6
Authority
ES
Spain
Prior art keywords
focus
scene
control signal
driven
focusing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
ES8900168A
Other languages
English (en)
Inventor
Robert Zwirn
Michael Thomas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Raytheon Co
Original Assignee
Hughes Aircraft Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hughes Aircraft Co filed Critical Hughes Aircraft Co
Publication of ES2012229A6 publication Critical patent/ES2012229A6/es
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28—Systems for automatic generation of focusing signals
    • G02B7/36—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals
    • G02B7/365—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals by analysis of the spatial frequency components of the image
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/67—Focus control based on electronic image sensor signals
    • H04N23/673—Focus control based on electronic image sensor signals based on contrast or high frequency components of image signals, e.g. hill climbing method

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Automatic Focus Adjustment (AREA)
  • Focusing (AREA)

Abstract

UN SISTEMA DE ENFOQUE AUTOMATICO SEGUN DEMANDA ACCIONADO UNICAMENTE POR LA INFORMACION DE ESCENA. EN UN SISTEMA DE VIDEO CON BARRIDOS, CUANDO LA CAMARA SE LLEVA A SU PUNTO DE ENFOQUE AUMENTARA EL CONTENIDO EN ALTA FRECUENCIA DE LA SEÑAL DE VIDEO. LA SEÑAL DE VIDEO SE HACE PASAR POR UN FILTRO PASA-BANDA Y DESPUES SE RECTIFICA EN UN INTEGRADOR CONDICIONAL QUE GENERA UNA SEÑAL DE CONTROL CUYA AMPLITUD ES INDICATIVA DEL GRADO DE ENFOQUE CONSEGUIDO. LA SEÑAL DE CONTROL SE ALMACENA Y MAS TARDE SE COMPARA CON UNA SEÑAL DE CONTROL DEDUCIDA DE UNA EXPLOTACION POSTERIOR. EN CUANTO SE DETECTE UN CAMBIO SIGNIFICATIVO EN LOS NIVELES DE LA SEÑAL DE CONTROL, SE ENVIA AL DISPOSITIVO DE ENFOQUE UNA SEÑAL DE ACCIONAMIENTO. SI DESPUES DE SER ANALIZADA LA ESCENA SIGUIENTE TUVIERA MENOR CONTENIDO EN ALTA FRECUENCIA, SE ENVIARIA, ENTONCES, AL DISPOSITIVO DE ENFOQUE UNA SEÑAL DE ACCIONAMIENTO DE POLARIDAD O SENTIDO OPUESTO.DE ESTE MODO, LA ESCENA ES BALANCEADA HACIA SU ENFOQUE OPTIMO.
ES8900168A 1988-01-19 1989-01-18 Enfoque automatico segun demanda accionado solo por la informacion de escena. Expired - Fee Related ES2012229A6 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/145,167 US4789898A (en) 1988-01-19 1988-01-19 Demand auto focus driven by scene information only

Publications (1)

Publication Number Publication Date
ES2012229A6 true ES2012229A6 (es) 1990-03-01

Family

ID=22511892

Family Applications (1)

Application Number Title Priority Date Filing Date
ES8900168A Expired - Fee Related ES2012229A6 (es) 1988-01-19 1989-01-18 Enfoque automatico segun demanda accionado solo por la informacion de escena.

Country Status (7)

Country Link
US (1) US4789898A (es)
EP (1) EP0372022A1 (es)
JP (1) JPH02503260A (es)
ES (1) ES2012229A6 (es)
IL (1) IL88783A (es)
TR (1) TR26530A (es)
WO (1) WO1989006891A1 (es)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4928170A (en) * 1988-06-21 1990-05-22 Visualtek, Inc. Automatic focus control for an image magnification system
US5347371A (en) * 1990-11-29 1994-09-13 Hitachi, Ltd. Video camera with extraction unit for extracting specific portion of video signal
GB9027943D0 (en) * 1990-12-21 1991-02-13 Gec Ferranti Defence Syst Ice detector
US5412487A (en) * 1991-11-27 1995-05-02 Hitachi, Ltd. Video camera and apparatus for extracting an object
US5912699A (en) * 1992-02-18 1999-06-15 Neopath, Inc. Method and apparatus for rapid capture of focused microscopic images
US5497188A (en) * 1993-07-06 1996-03-05 Kaye; Perry Method for virtualizing an environment
AU748148B2 (en) * 2000-03-16 2002-05-30 Canon Kabushiki Kaisha A method for single camera range finding using a wavelet decomposition
US20030118245A1 (en) * 2001-12-21 2003-06-26 Leonid Yaroslavsky Automatic focusing of an imaging system
JP4764169B2 (ja) * 2003-09-10 2011-08-31 シャープ株式会社 撮影レンズ位置制御装置
US20070014468A1 (en) * 2005-07-12 2007-01-18 Gines David L System and method for confidence measures for mult-resolution auto-focused tomosynthesis

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5338897A (en) * 1976-09-20 1978-04-10 Kyoto Daigaku Souchiyou Method of separating isotope using infrared rays
DE3068260D1 (en) * 1979-12-26 1984-07-19 Hughes Aircraft Co Closed loop autofocus system
JPS56132315A (en) * 1980-03-19 1981-10-16 Fuji Photo Film Co Ltd Automatic focusing method
JPS5770503A (en) * 1980-10-20 1982-05-01 Mamiya Koki Kk Automatic focusing device
JPS5961807A (ja) * 1982-09-30 1984-04-09 Canon Inc 自動焦点制御装置
JPS60132473A (ja) * 1983-12-20 1985-07-15 Asahi Optical Co Ltd ビデオカメラのオ−トフオ−カス装置
JPS61105978A (ja) * 1984-10-30 1986-05-24 Sanyo Electric Co Ltd オ−トフオ−カス回路
JPH0783446B2 (ja) * 1985-05-16 1995-09-06 株式会社リコー ビデオカメラ等のオ−トフオ−カス装置
US4635124A (en) * 1985-11-26 1987-01-06 Rca Corporation Auxiliary focusing circuit for automatic focusing camera
JPH0771209B2 (ja) * 1986-06-13 1995-07-31 三洋電機株式会社 オ−トフォ−カス回路

Also Published As

Publication number Publication date
EP0372022A1 (en) 1990-06-13
WO1989006891A1 (en) 1989-07-27
JPH02503260A (ja) 1990-10-04
TR26530A (tr) 1994-04-22
IL88783A (en) 1992-03-29
US4789898A (en) 1988-12-06

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19980504