JPS644716A - Autofocusing system - Google Patents
Autofocusing systemInfo
- Publication number
- JPS644716A JPS644716A JP16060487A JP16060487A JPS644716A JP S644716 A JPS644716 A JP S644716A JP 16060487 A JP16060487 A JP 16060487A JP 16060487 A JP16060487 A JP 16060487A JP S644716 A JPS644716 A JP S644716A
- Authority
- JP
- Japan
- Prior art keywords
- image
- movement
- block
- focusing
- ccd
- 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.)
- Pending
Links
Landscapes
- Automatic Focus Adjustment (AREA)
Abstract
PURPOSE:To attain accurate focusing even on an object in motion by executing detection for focusing with an optical image on a two-dimensional CCD and driving the light receiving surface of the two-dimensional CCD into blocks in a matrix shape so that focusing is executed as for the block whose movement following the passage of time is the least. CONSTITUTION:The change coupled element (CCD) 2 has a structure where image elements are arrayed in two dimensions and sets two areas which receives the respective image formations of separation lenses 10 and 11. Moreover the respective areas are set to be vertically and horizontally divided into the blocks in a matrix shape in the corresponding positions each other. And the existence of the movement of an image following the passage of time is detected every block. If the movement exists, the block whose movement is the least is selected and it the movement does not exist, the specified block is selected. Thereafter, as for the selected block correlation calculations are sequentially executed between the image signals in two areas. A distance (l) between two optical images on the CCD 2 is calculated from the combination of correlation which gives the highest correlation and the quantity of defocusing is calculated to shift the control of driving an image pickup lens. Thus, the accurate focusing an be possible even in case of photographing the object in motion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16060487A JPS644716A (en) | 1987-06-26 | 1987-06-26 | Autofocusing system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16060487A JPS644716A (en) | 1987-06-26 | 1987-06-26 | Autofocusing system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS644716A true JPS644716A (en) | 1989-01-09 |
Family
ID=15718536
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16060487A Pending JPS644716A (en) | 1987-06-26 | 1987-06-26 | Autofocusing system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS644716A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001133678A (en) * | 1999-11-02 | 2001-05-18 | Olympus Optical Co Ltd | Automatic multi-point focusing camera |
-
1987
- 1987-06-26 JP JP16060487A patent/JPS644716A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001133678A (en) * | 1999-11-02 | 2001-05-18 | Olympus Optical Co Ltd | Automatic multi-point focusing camera |
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