CN105676563A - Zoom camera focusing method and camera - Google Patents
Zoom camera focusing method and camera Download PDFInfo
- Publication number
- CN105676563A CN105676563A CN201610203042.4A CN201610203042A CN105676563A CN 105676563 A CN105676563 A CN 105676563A CN 201610203042 A CN201610203042 A CN 201610203042A CN 105676563 A CN105676563 A CN 105676563A
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- zoom
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- focusing
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power focusing
- G03B13/36—Autofocus systems
-
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
- Automatic Focus Adjustment (AREA)
- Focusing (AREA)
Abstract
The invention discloses a zoom camera focusing method and a camera. A zoom camera comprises a zoom lens, a variable-magnification motor and a zoom motor. The focusing method comprises the following steps: providing N gears for variable magnification of a camera lens, wherein each magnification gear is equipped with M Focus preset application focus sections correspondingly; under a fixed optical variable magnification, obtaining a focal length focuscur for allowing an object to be shot to realize clear imaging, and comparing the focal length focuscur with M focal lengths in a focus section array under maximum optical magnification to obtain a focal section D most proximate to the focuscur; and when the magnification times change, realizing automatic focusing by the zoom motor according to the correspondence relation between the focal length focuscur, the focal section D and the focusing array. The camera comprises a data unit, a focusing unit and a calculating unit. The method is realized through pure algorithms, and is low in cost, suitable for all fixed-focus environments and capable of quick and accurate imaging. The zoom camera focusing method and the camera are widely suitable for the photography focusing field.
Description
Technical field
The present invention relates to photography focusing field, particularly relate to focusing method and the camera of a kind of zoom camera.
Background technology
When camera shooting is amplified, (camera lens extension); When camera shooting is reduced (camera lens retraction).
The focusing function of camera the earliest is all need manual operation, focuses, shooting. After in 1963, Canon company develop first set autofocus system. Electron focusing technology is flourish backward, engenders portable, it is easy to the focusing technology of operation, product. The zoom of present digital camera, AF function are exactly the achievement of this technology. Automatically focus on (AF) function, be also classified into active and passive type through development. Automatically focus on and be divided into active and passive type two kinds. The active mode taking a kind of similar range estimation range finding realizes auto-focusing, a kind of infrared ray (or other ray) launched by camera, the distance of subject is determined in reflection according to subject, then adjusts camera lens combination according to the result recorded, it is achieved auto-focusing. The limitation of this mode be in that between subject body and camera can not other thing, such as glass, the factor affected by light is also bigger. Passive type focusing is that actual imaging according to camera lens judges whether correct coking, it is judged that according to being usually contrast detection formula, concrete principle is considerably complicated. And being realized by lens imaging, cost is high, there will be situation about cannot focus when object farther out, dark.
Summary of the invention
In order to solve above-mentioned technical problem, it is an object of the invention to provide a kind of when blur-free imaging, change shooting optical multiplier energy auto-focusing, quickly and the focusing method of the zoom camera of low cost and camera.
The technical solution adopted in the present invention is: the focusing method of a kind of zoom camera, and described zoom camera includes zoom lens, zoom motor and zoom motor, and described focusing method includes:
A: creating optical zoom array, described optical zoom array has the position data of the zoom motor corresponding with N number of optical zoom gear;Creating burnt hop count group, described optical zoom array has the position data of the zoom motor of blur-free imaging under N number of optical zoom shelves of M Jiao's section;
B: under fixing optical zoom number, obtains and is intended to the focal distance f ocuscur of shooting object blur-free imaging and compares with M burnt section under greatest optical multiple in burnt hop count group, obtaining focuscur immediate Jiao section D with it;
C: when amplification changes, zoom motor realizes auto-focusing according to the corresponding relation of focal distance f ocuscur, burnt section D and focusing array.
Further, described step C particularly as follows:
C1: obtain the difference para1 of focal distance f ocuscur immediate burnt section with it in zoom array, obtain the difference para2 of 2 burnt sections immediate with focal distance f ocuscu in zoom array, calculate deviation ratio P=para1/para2;
C2: obtain the difference temp1 of the zoom motor position of burnt section D and one part of the body cavity below the umbilicus, housing the bladder, kidneys and bowels section in focusing array, and Jiao section D and the difference temp2 of the zoom motor position of a burnt section on it, when amplifying, the position of zoom motor is that zoom motor adds (temp1 is multiplied by P) on the basis of focal distance f ocuscur position; When reducing, the position of zoom motor is that zoom motor adds (temp1 is multiplied by P) on the basis of focal distance f ocuscur position.
Further, described zoom array and the data of zoom array are adjustable.
Further, fixing in described step B optical zoom number is the optical zoom number that camera is maximum.
A kind of camera, it is for implementing the focusing method of above-mentioned zoom camera, and described camera includes:
Data cell: it is used for creating optical zoom array, and described optical zoom array has the position data of the zoom motor corresponding with N number of optical zoom gear; Creating burnt hop count group, described optical zoom array has the position data of the zoom motor of blur-free imaging under N number of optical zoom shelves of M Jiao's section;
Focusing unit: it is under fixing optical zoom number, obtains and is intended to the focal distance f ocuscur of shooting object blur-free imaging and compares with M burnt section under greatest optical multiple in burnt hop count group, obtaining the D of focuscur immediate Jiao's section with it;
Computing unit: it is for when amplification changes, and zoom motor realizes auto-focusing according to the corresponding relation of focal distance f ocuscur, burnt section D and focusing array.
Further, described computing unit includes:
First computing unit: it is used for: obtain the difference para1 of focal distance f ocuscur immediate burnt section with it in zoom array, obtain the difference para2 of 2 burnt sections immediate with focal distance f ocuscu in zoom array, calculate deviation ratio P=para1/para2;
Second computing unit: it is used for: obtain the difference para1 of focal distance f ocuscur immediate burnt section with it in zoom array, obtain the difference para2 of 2 burnt sections immediate with focal distance f ocuscu in zoom array, calculate deviation ratio P=para1/para2;
Further, described zoom array and the data of zoom array are adjustable.
Further, described fixing optical zoom number is the optical zoom number that camera is maximum.
The invention has the beneficial effects as follows: the present invention by taking N times of gear to camera lens zoom, and each multiple shelves configure corresponding M Focus and preset the burnt section of application. N, M determine according to practical application request. When blur-free imaging, by calculating the excursion percentage of zoom motor, and preset the burnt segment value of application, thus realizing changing shooting optical multiplier energy auto-focusing.The pure algorithm of the present invention realizes, low cost, it is adaptable to all of focus environment, quickly, accurate imaging. For the wide-long shot such as taking photo by plane, it is possible to accomplish to focus in infinity, it is also possible to manually adjust at any time. Relative to auto-focusing, imaging requirements is accurate, shoot the application demand of far object distance to be more suitable for oceangoing voyage bat, industry shooting, video conference etc.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
Fig. 1 is the flow chart of a specific embodiment of the present invention.
Detailed description of the invention
It should be noted that when not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined.
A kind of focusing method of zoom camera, described zoom camera includes zoom lens, zoom motor and zoom motor, and described focusing method includes:
A: creating optical zoom array, described optical zoom array has the position data of the zoom motor corresponding with N number of optical zoom gear; Creating burnt hop count group, described optical zoom array has the position data of the zoom motor of blur-free imaging under N number of optical zoom shelves of M Jiao's section;
B: under fixing optical zoom number, obtains and is intended to the focal distance f ocuscur of shooting object blur-free imaging and compares with M burnt section under greatest optical multiple in burnt hop count group, obtaining the D of focuscur immediate Jiao's section with it;
C: when amplification changes, zoom motor realizes auto-focusing according to the corresponding relation of focal distance f ocuscur, burnt section D and focusing array.
By camera lens zoom takes N times of gear, each multiple shelves configure corresponding M Focus and preset the burnt section of application. N, M determine according to practical application request. When blur-free imaging, by calculating the excursion percentage of zoom motor, and preset the burnt segment value of application, thus realizing changing shooting optical multiplier energy auto-focusing.
Be further used as preferred embodiment, described step C particularly as follows:
C1: obtain the difference para1 of focal distance f ocuscur immediate burnt section with it in zoom array, obtain the difference para2 of 2 burnt sections immediate with focal distance f ocuscu in zoom array, calculate deviation ratio P=para1/para2;
C2: obtain the difference temp1 of the zoom motor position of burnt section D and one part of the body cavity below the umbilicus, housing the bladder, kidneys and bowels section in focusing array, and Jiao section D and the difference temp2 of the zoom motor position of a burnt section on it, when amplifying, the position of zoom motor is that zoom motor adds (temp1 is multiplied by P) on the basis of focal distance f ocuscur position; When reducing, the position of zoom motor is that zoom motor adds (temp1 is multiplied by P) on the basis of focal distance f ocuscur position.
Being further used as preferred embodiment, described zoom array and the data of zoom array are adjustable, and camera lens zoom takes 10 or N times of gear, and each multiple shelves configuration corresponding 10 or M Focus apply burnt section. N, M determine according to practical application request.
Being further used as preferred embodiment, optical zoom number fixing in described step B is the optical zoom number that camera is maximum.
Embodiment 1
As it is shown in figure 1, be the flow chart of a specific embodiment of the present invention.
When camera takes 10 times of optical magnifications, or means identification automatic by camera is intended to clap the focal distance f ocucur of object blur-free imaging, recycle ratio is 20 default burnt sections relatively, obtain immediate burnt hop count group, if focal distance f ocucur is preset value, then can either directly through default burnt hop count group, zoom motor is navigated to corresponding position and realizes auto-focusing, if from focucur not being preset value, then starting algorithm processes, zoom array obtains the difference para1 of focal distance f ocuscur immediate burnt section with it, obtain the difference para2 of 2 burnt sections immediate with focal distance f ocuscu in zoom array, calculate deviation ratio P=para1/para2,Obtain the difference temp1 of the zoom motor position of burnt section D and one part of the body cavity below the umbilicus, housing the bladder, kidneys and bowels section in focusing array, and Jiao section D and the difference temp2 of the zoom motor position of a burnt section on it, when amplifying, the position of zoom motor is that zoom motor adds (temp1 is multiplied by P) on the basis of focal distance f ocuscur position; When reducing, the position of zoom motor is that zoom motor adds (temp1 is multiplied by P) on the basis of focal distance f ocuscur position.
The pure algorithm of the present invention realizes, low cost, it is adaptable to all of focus environment, quickly, accurate imaging. For the wide-long shot such as taking photo by plane, it is possible to accomplish to focus in infinity, it is also possible to manually adjust at any time. Relative to auto-focusing, imaging requirements is accurate, shoot the application demand of far object distance to be more suitable for oceangoing voyage bat, industry shooting, video conference etc.
A kind of camera, it is for implementing the focusing method of above-mentioned zoom camera, and described camera includes:
Data cell: it is used for creating optical zoom array, and described optical zoom array has the position data of the zoom motor corresponding with N number of optical zoom gear; Creating burnt hop count group, described optical zoom array has the position data of the zoom motor of blur-free imaging under N number of optical zoom shelves of M Jiao's section;
Focusing unit: it is under fixing optical zoom number, obtains and is intended to the focal distance f ocuscur of shooting object blur-free imaging and compares with M burnt section under greatest optical multiple in burnt hop count group, obtaining focuscur immediate Jiao section D with it;
Computing unit: it is for when amplification changes, and zoom motor realizes auto-focusing according to the corresponding relation of focal distance f ocuscur, burnt section D and focusing array.
Being further used as preferred embodiment, described computing unit includes:
First computing unit: it is used for: obtain the difference para1 of focal distance f ocuscur immediate burnt section with it in zoom array, obtain the difference para2 of 2 burnt sections immediate with focal distance f ocuscu in zoom array, calculate deviation ratio P=para1/para2;
Second computing unit: it is used for: obtain the difference para1 of focal distance f ocuscur immediate burnt section with it in zoom array, obtain the difference para2 of 2 burnt sections immediate with focal distance f ocuscu in zoom array, calculate deviation ratio P=para1/para2;
Being further used as preferred embodiment, described zoom array and the data of zoom array are adjustable.
Being further used as preferred embodiment, described fixing optical zoom number is the optical zoom number that camera is maximum.
The present invention by taking N times of gear to camera lens zoom, and each multiple shelves configure corresponding M Focus and preset the burnt section of application. N, M determine according to practical application request. When blur-free imaging, by calculating the excursion percentage of zoom motor, and preset the burnt segment value of application, thus realizing changing shooting optical multiplier energy auto-focusing. The pure algorithm of the present invention realizes, low cost, it is adaptable to all of focus environment, quickly, accurate imaging. For the wide-long shot such as taking photo by plane, it is possible to accomplish to focus in infinity, it is also possible to manually adjust at any time. Relative to auto-focusing, imaging requirements is accurate, shoot the application demand of far object distance to be more suitable for oceangoing voyage bat, industry shooting, video conference etc.
It is above the preferably enforcement of the present invention has been illustrated, but the invention is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent variations or replacement under the premise without prejudice to spirit of the present invention, and these equivalent deformation or replacement are all contained in the application claim limited range.
Claims (8)
1. a focusing method for zoom camera, described zoom camera includes zoom lens, zoom motor and zoom motor, it is characterised in that described focusing method includes:
A: creating optical zoom array, described optical zoom array has the position data of the zoom motor corresponding with N number of optical zoom gear;Creating burnt hop count group, described optical zoom array has the position data of the zoom motor of blur-free imaging under N number of optical zoom shelves of M Jiao's section;
B: under fixing optical zoom number, obtains and is intended to the focal distance f ocuscur of shooting object blur-free imaging and compares with M burnt section under greatest optical multiple in burnt hop count group, obtaining focuscur immediate Jiao section D with it;
C: when amplification changes, zoom motor realizes auto-focusing according to the corresponding relation of focal distance f ocuscur, burnt section D and focusing array.
2. the focusing method of zoom camera according to claim 1, it is characterised in that: described step C particularly as follows:
C1: obtain the difference para1 of focal distance f ocuscur immediate burnt section with it in zoom array, obtain the difference para2 of 2 burnt sections immediate with focal distance f ocuscu in zoom array, calculate deviation ratio P=para1/para2;
C2: obtain the difference temp1 of the zoom motor position of burnt section D and one part of the body cavity below the umbilicus, housing the bladder, kidneys and bowels section in focusing array, and Jiao section D and the difference temp2 of the zoom motor position of a burnt section on it, when amplifying, the position of zoom motor is that zoom motor adds (temp1 is multiplied by P) on the basis of focal distance f ocuscur position; When reducing, the position of zoom motor is that zoom motor adds (temp1 is multiplied by P) on the basis of focal distance f ocuscur position.
3. the focusing method of zoom camera according to claim 1, it is characterised in that: described zoom array and the data of zoom array are adjustable.
4. the focusing method of zoom camera according to claim 1, it is characterised in that: optical zoom number fixing in described step B is the optical zoom number that camera is maximum.
5. a camera, it is characterised in that it is for implementing the focusing method of the zoom camera as described in any one of Claims 1-4, and described camera includes:
Data cell: it is used for creating optical zoom array, and described optical zoom array has the position data of the zoom motor corresponding with N number of optical zoom gear; Creating burnt hop count group, described optical zoom array has the position data of the zoom motor of blur-free imaging under N number of optical zoom shelves of M Jiao's section;
Focusing unit: it is under fixing optical zoom number, obtains and is intended to the focal distance f ocuscur of shooting object blur-free imaging and compares with M burnt section under greatest optical multiple in burnt hop count group, obtaining the D of focuscur immediate Jiao's section with it;
Computing unit: it is for when amplification changes, and zoom motor realizes auto-focusing according to the corresponding relation of focal distance f ocuscur, burnt section D and focusing array.
6. camera according to claim 5, it is characterised in that described computing unit includes:
First computing unit: it is used for: obtain the difference para1 of focal distance f ocuscur immediate burnt section with it in zoom array, obtain the difference para2 of 2 burnt sections immediate with focal distance f ocuscu in zoom array, calculate deviation ratio P=para1/para2;
Second computing unit: it is used for: obtain the difference para1 of focal distance f ocuscur immediate burnt section with it in zoom array, obtain the difference para2 of 2 burnt sections immediate with focal distance f ocuscu in zoom array, calculate deviation ratio P=para1/para2.
7. camera according to claim 5, it is characterised in that described zoom array and the data of zoom array are adjustable.
8. camera according to claim 5, it is characterised in that described fixing optical zoom number is the optical zoom number that camera is maximum.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610203042.4A CN105676563B (en) | 2016-03-31 | 2016-03-31 | A kind of focusing method and camera of zoom camera |
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| CN201610203042.4A CN105676563B (en) | 2016-03-31 | 2016-03-31 | A kind of focusing method and camera of zoom camera |
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| CN105676563A true CN105676563A (en) | 2016-06-15 |
| CN105676563B CN105676563B (en) | 2018-09-18 |
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| CN111787224A (en) * | 2020-07-10 | 2020-10-16 | 深圳传音控股股份有限公司 | Image acquisition method, terminal device and computer-readable storage medium |
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| CN105676563B (en) | 2018-09-18 |
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