JPS575019A - Focus controller - Google Patents
Focus controllerInfo
- Publication number
- JPS575019A JPS575019A JP7974280A JP7974280A JPS575019A JP S575019 A JPS575019 A JP S575019A JP 7974280 A JP7974280 A JP 7974280A JP 7974280 A JP7974280 A JP 7974280A JP S575019 A JPS575019 A JP S575019A
- Authority
- JP
- Japan
- Prior art keywords
- video signal
- signal
- lens system
- circuit
- detected
- 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.)
- Granted
Links
Classifications
-
- 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)
- Multimedia (AREA)
- Signal Processing (AREA)
- Automatic Focus Adjustment (AREA)
- Focusing (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7974280A JPS575019A (en) | 1980-06-13 | 1980-06-13 | Focus controller |
US06/262,918 US4392726A (en) | 1980-06-13 | 1981-05-12 | Automatic focus control system for video camera with improved position detecting apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7974280A JPS575019A (en) | 1980-06-13 | 1980-06-13 | Focus controller |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS575019A true JPS575019A (en) | 1982-01-11 |
JPH0324648B2 JPH0324648B2 (ja) | 1991-04-03 |
Family
ID=13698664
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7974280A Granted JPS575019A (en) | 1980-06-13 | 1980-06-13 | Focus controller |
Country Status (2)
Country | Link |
---|---|
US (1) | US4392726A (ja) |
JP (1) | JPS575019A (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58123277A (ja) * | 1982-01-19 | 1983-07-22 | Asahi Optical Co Ltd | ビデオカメラの自動焦点整合装置 |
JPS60183876A (ja) * | 1984-03-02 | 1985-09-19 | Konishiroku Photo Ind Co Ltd | ビデオカメラのオ−トフオ−カス装置 |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5882211A (ja) * | 1981-11-12 | 1983-05-17 | Asahi Optical Co Ltd | 自動焦点整合装置 |
JPS5891410A (ja) * | 1981-11-27 | 1983-05-31 | Olympus Optical Co Ltd | 撮像装置の合焦方法 |
US4544953A (en) * | 1983-03-28 | 1985-10-01 | Designs For Vision, Inc. | Automatic facusing using slope and peak detection |
JPS60120309A (ja) * | 1983-12-02 | 1985-06-27 | Canon Inc | 自動焦点調節装置 |
US4616264A (en) * | 1984-08-28 | 1986-10-07 | Vicon Industries, Inc. | Auto focus system |
JPS61105978A (ja) * | 1984-10-30 | 1986-05-24 | Sanyo Electric Co Ltd | オ−トフオ−カス回路 |
FR2580088B1 (ja) * | 1985-04-05 | 1987-05-15 | Trt Telecom Radio Electr | |
US5446494A (en) * | 1986-03-04 | 1995-08-29 | Canon Kabushiki Kaisha | Focus detecting system |
US4762986A (en) * | 1986-03-10 | 1988-08-09 | Canon Kabushiki Kaisha | Automatic focussing system including in-focus position prediction means |
JPH0771209B2 (ja) * | 1986-06-13 | 1995-07-31 | 三洋電機株式会社 | オ−トフォ−カス回路 |
JP2535845B2 (ja) * | 1986-10-08 | 1996-09-18 | キヤノン株式会社 | 自動合焦装置 |
US5003400A (en) * | 1987-08-19 | 1991-03-26 | Hitachi, Ltd. | Focusing apparatus of video camera or the like |
US4814889A (en) * | 1987-10-07 | 1989-03-21 | General Electric Company | Automatic focussing system |
US4794459A (en) * | 1987-12-28 | 1988-12-27 | Eastman Kodak Company | Columnar focusing indicator for a manually focused video camera |
US4775892A (en) * | 1987-12-28 | 1988-10-04 | Eastman Kodak Company | Brightness-dependent focusing aid for a manually focused video camera |
US4843413A (en) * | 1988-03-28 | 1989-06-27 | Eastman Kodak Company | System which uses threshold counts to achieve automatic focus |
US4977457A (en) * | 1988-05-10 | 1990-12-11 | Canon Kabushiki Kaisha | Autofocus device for determining an in-focus and real in-focus state |
US4972268A (en) * | 1989-06-21 | 1990-11-20 | Burle Technologies, Inc. | Dual focus range apparatus for TV camera |
US4974091A (en) * | 1989-06-21 | 1990-11-27 | Burle Technologies, Inc. | Focus locking apparatus for TV camera |
JP2974339B2 (ja) * | 1989-09-20 | 1999-11-10 | キヤノン株式会社 | 自動焦点調節装置 |
JP2725937B2 (ja) * | 1992-02-19 | 1998-03-11 | 三洋電機株式会社 | オートフォーカス装置 |
JP3338322B2 (ja) | 1997-02-25 | 2002-10-28 | 三洋電機株式会社 | オートフォーカスカメラ |
JP2002207832A (ja) * | 2000-12-28 | 2002-07-26 | Atsushi Takahashi | インターネット技術指導教育配信システム、及び通信網を利用した指導システム |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5928884B2 (ja) * | 1972-12-27 | 1984-07-17 | キヤノン株式会社 | 距離検出方式 |
US4053934A (en) * | 1972-12-29 | 1977-10-11 | Kornreich Philipp G | Measuring the quality of images |
US3967056A (en) * | 1973-02-26 | 1976-06-29 | Minolta Camera Kabushiki Kaisha | Automatic focusing apparatus |
JPS5156627A (en) * | 1974-11-13 | 1976-05-18 | Canon Kk | Butsutaizosenmeidokenshutsuhoshiki |
US4005443A (en) * | 1975-09-11 | 1977-01-25 | Fritz Albrecht | Scanning device and method for automatic focusing |
JPS5486325A (en) * | 1977-12-22 | 1979-07-09 | Minolta Camera Co Ltd | Cine camera of automatic focus control type |
JPS54161325A (en) * | 1978-06-10 | 1979-12-20 | Ricoh Co Ltd | Focus detector |
-
1980
- 1980-06-13 JP JP7974280A patent/JPS575019A/ja active Granted
-
1981
- 1981-05-12 US US06/262,918 patent/US4392726A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58123277A (ja) * | 1982-01-19 | 1983-07-22 | Asahi Optical Co Ltd | ビデオカメラの自動焦点整合装置 |
JPS60183876A (ja) * | 1984-03-02 | 1985-09-19 | Konishiroku Photo Ind Co Ltd | ビデオカメラのオ−トフオ−カス装置 |
Also Published As
Publication number | Publication date |
---|---|
JPH0324648B2 (ja) | 1991-04-03 |
US4392726A (en) | 1983-07-12 |
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