JPS55137784A - Focus adjustment system in image pickup device using image sensor - Google Patents
Focus adjustment system in image pickup device using image sensorInfo
- Publication number
- JPS55137784A JPS55137784A JP4621679A JP4621679A JPS55137784A JP S55137784 A JPS55137784 A JP S55137784A JP 4621679 A JP4621679 A JP 4621679A JP 4621679 A JP4621679 A JP 4621679A JP S55137784 A JPS55137784 A JP S55137784A
- Authority
- JP
- Japan
- Prior art keywords
- output
- levels
- focus
- amplifiers
- pulses
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Focusing (AREA)
- Automatic Focus Adjustment (AREA)
Abstract
PURPOSE:To make it possible to facilitate taking the focus by providing lightness and darkness discrimination reference levels to count picture element outputs between these levels. CONSTITUTION:The picture element output of image sensor 4 which is gated by gates 6 and 7 and corresponds to the light part and the dark part of an object is held in the input side of amplifiers A1 and A6. Light part discrimination reference level V1 and dark part discrimination reference level V2 which are corrected according to transmitivity of the object are output from amplifiers A4 and A5 of adder circuits respectively. When these reference levels and the output of amplifier 5 are supplied to amplifiers A7 and A8 respectively, picture element output pulses between levels V1 and V2 are output from NAND element 9. The number of these pulses is counted in 10 for every scanning and is displayed on display unit 12. Consequently, if the number of pulses is set to a minimum while changing gradually the focus of the image pickup device, the focus can be taken simply.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4621679A JPS55137784A (en) | 1979-04-16 | 1979-04-16 | Focus adjustment system in image pickup device using image sensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4621679A JPS55137784A (en) | 1979-04-16 | 1979-04-16 | Focus adjustment system in image pickup device using image sensor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55137784A true JPS55137784A (en) | 1980-10-27 |
JPS6243590B2 JPS6243590B2 (en) | 1987-09-16 |
Family
ID=12740899
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4621679A Granted JPS55137784A (en) | 1979-04-16 | 1979-04-16 | Focus adjustment system in image pickup device using image sensor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55137784A (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5899069A (en) * | 1981-12-08 | 1983-06-13 | Sankusu:Kk | Signal processor for image sensor |
JPS58129407A (en) * | 1982-01-28 | 1983-08-02 | Toshiba Corp | Automatic focusing device |
JPS58215526A (en) * | 1982-06-10 | 1983-12-15 | Ricoh Co Ltd | Focusing display |
JPS58215528A (en) * | 1982-06-10 | 1983-12-15 | Ricoh Co Ltd | Focusing display |
JPS59133513A (en) * | 1982-11-05 | 1984-07-31 | ザ・ブリテイツシユ・ライブラリ−・ボ−ド | Apparatus for indicating focusing condition of image of document |
JPS60121407A (en) * | 1983-11-09 | 1985-06-28 | Shinetsu Eng Kk | Focusing method |
JPS60178418A (en) * | 1984-02-22 | 1985-09-12 | インタ−ナショナル ビジネス マシ−ンズ コ−ポレ−ション | Focus controller for optical system |
JPS60189177U (en) * | 1984-05-25 | 1985-12-14 | 富士電機株式会社 | Captured image focus adjustment device |
JPS6111714A (en) * | 1984-06-26 | 1986-01-20 | Matsushita Electric Ind Co Ltd | Automatic focus adjuster of microscope |
US4633319A (en) * | 1984-08-08 | 1986-12-30 | Fuji Electric Co., Ltd. | Method and apparatus for detecting focusing in an image pickup device |
JPH0388079A (en) * | 1989-08-31 | 1991-04-12 | Seikosha Co Ltd | Method for recognizing object |
-
1979
- 1979-04-16 JP JP4621679A patent/JPS55137784A/en active Granted
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5899069A (en) * | 1981-12-08 | 1983-06-13 | Sankusu:Kk | Signal processor for image sensor |
JPH0546144B2 (en) * | 1981-12-08 | 1993-07-13 | Sunx Ltd | |
JPS58129407A (en) * | 1982-01-28 | 1983-08-02 | Toshiba Corp | Automatic focusing device |
JPH0368334B2 (en) * | 1982-06-10 | 1991-10-28 | Ricoh Kk | |
JPS58215526A (en) * | 1982-06-10 | 1983-12-15 | Ricoh Co Ltd | Focusing display |
JPS58215528A (en) * | 1982-06-10 | 1983-12-15 | Ricoh Co Ltd | Focusing display |
JPS59133513A (en) * | 1982-11-05 | 1984-07-31 | ザ・ブリテイツシユ・ライブラリ−・ボ−ド | Apparatus for indicating focusing condition of image of document |
JPS60121407A (en) * | 1983-11-09 | 1985-06-28 | Shinetsu Eng Kk | Focusing method |
JPS60178418A (en) * | 1984-02-22 | 1985-09-12 | インタ−ナショナル ビジネス マシ−ンズ コ−ポレ−ション | Focus controller for optical system |
JPS60189177U (en) * | 1984-05-25 | 1985-12-14 | 富士電機株式会社 | Captured image focus adjustment device |
JPH0342781Y2 (en) * | 1984-05-25 | 1991-09-06 | ||
JPS6111714A (en) * | 1984-06-26 | 1986-01-20 | Matsushita Electric Ind Co Ltd | Automatic focus adjuster of microscope |
JPH0462046B2 (en) * | 1984-06-26 | 1992-10-05 | Matsushita Electric Ind Co Ltd | |
US4633319A (en) * | 1984-08-08 | 1986-12-30 | Fuji Electric Co., Ltd. | Method and apparatus for detecting focusing in an image pickup device |
JPH0388079A (en) * | 1989-08-31 | 1991-04-12 | Seikosha Co Ltd | Method for recognizing object |
JPH0551944B2 (en) * | 1989-08-31 | 1993-08-04 | Seikosha Kk |
Also Published As
Publication number | Publication date |
---|---|
JPS6243590B2 (en) | 1987-09-16 |
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