CN102469247A - Photographic device and dynamic focusing method thereof - Google Patents
Photographic device and dynamic focusing method thereof Download PDFInfo
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- CN102469247A CN102469247A CN2010105385089A CN201010538508A CN102469247A CN 102469247 A CN102469247 A CN 102469247A CN 2010105385089 A CN2010105385089 A CN 2010105385089A CN 201010538508 A CN201010538508 A CN 201010538508A CN 102469247 A CN102469247 A CN 102469247A
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Abstract
The invention discloses a photographic device and a dynamic focusing method thereof. The method comprises the following steps of: acquiring monitored object images which are continuously shot by a lens of the photographic device; sensing a dynamic region in the acquired images; and if the dynamic region is sensed, regulating the focal position of the lens of the photographic device to be a specific position in the dynamic region. By the device and the method, a clear image of a moving object can be acquired.
Description
Technical field
The present invention relates to a kind of camera head and the method for dynamically focusing.
Background technology
The focusing mode of traditional camera head is static focusing, that is camera head itself need remain static, and subject also need be under the static state, can be smoothly to the subject shooting operation of focusing.If traditional camera head is in mobile status, or subject is in mobile status, the shooting operation of then can't focusing smoothly.Because do not focus, captured photo or image under this situation, the object in the image are known from experience and are presented fringe.
Summary of the invention
In view of above content; Be necessary to provide the dynamically method of focusing of a kind of camera head; Its dynamic background detecting moving object technology capable of using is detected the dynamic area in the image of picked-up, adjust the focal position of camera head lens then according to the positional information of this dynamic area.
In one embodiment, this method comprises the steps:
Obtain the monitored object image of the continuous picked-up of camera lens of camera head;
In the image that obtains, detect the dynamic area; And
If detect the dynamic area, then the focal position with the camera lens of this camera head is adjusted into the ad-hoc location in this dynamic area.
Preceding method can be carried out by camera head, and wherein this camera head has one or more processors, memory and is kept at one or more modules, program or the instruction set that is used to carry out these methods in the memory.
The instruction that is used for carrying out preceding method can be included in and be configured to the program product carried out by one or more processors.
Compared to prior art; The described camera head and the method for dynamically focusing thereof; Utilize dynamic background detecting moving object technology; In the image of picked-up, detect the dynamic area, adjust the focal position of camera head lens then according to the positional information of this dynamic area, thereby obtain mobile object image clearly.
Description of drawings
Fig. 1 is the block diagram of camera head preferred embodiment of the present invention.
Fig. 2 is the functional block diagram of dynamic focusing system.
Fig. 3 is dynamically the focus flow chart of preferred embodiment of method of camera head of the present invention.
The main element symbol description
| Camera head | ?2 |
| Dynamic focusing system | ?20 |
| Camera lens | ?21 |
| Memory | ?22 |
| Driver | ?23 |
| Processor | ?24 |
| Image collection module | ?201 |
| The dynamic area detecting module | ?202 |
| Lens regulating module | ?203 |
Embodiment
As shown in Figure 1, be the block diagram of camera head preferred embodiment of the present invention.In the present embodiment, this dynamic focusing system 20 runs in the camera head 2.This camera head 2 also comprises camera lens 21, memory 22, driver 23 and processor 24.Said camera head 2 include, but not limited to can by software or hardware circuit mode drive patrol turntable video camera, fire ball video camera (SpeedDome) but and translation (Pan), tilt (Tilt), PTZ (Pan/Tilt/Zoom) video camera of convergent-divergent (Zoom) etc.
Wherein, said camera lens 21 is used for obtaining continuously the image of monitored object.In the present embodiment, said camera lens 21 be charge coupled device (Charge Coupled Device, CCD).Said driver 23 can be a CD-ROM drive motor, and the camera lens 21 that is used to drive camera head 2 moves to carry out the focal length adjustment.
Said memory 22 is used to store the image that this dynamic focusing system 20 and camera lens 21 obtain.In the present embodiment; This dynamic focusing system 20 is used to utilize dynamic background detecting moving object technology; In the image of picked-up, detect the dynamic area, adjust the focal position of camera head lens then according to the positional information of this dynamic area, detailed process is referring to the description of Fig. 3.
In the present embodiment, said dynamic focusing system 20 can be divided into one or more modules, and said one or more modules are configured to carried out by one or more processors (present embodiment is a processor 24), to accomplish the present invention.For example, consult shown in Figure 2ly, said dynamic focusing system 20 is divided into image collection module 201, dynamic area detecting module 202 and lens regulating module 203.The alleged module of the present invention is to accomplish the block of a specific function, is more suitable in describing the implementation of software in camera head 2 than program, and the function of each module will combine the flow chart of Fig. 3 to describe in detail.
As shown in Figure 3, be that the present invention utilizes camera head to carry out the flow chart of preferred embodiment of the method for human-like detecting.
Step S1, image collection module 201 is obtained the monitored object image of the camera lens 21 continuous picked-ups of camera head 2.For example, suppose that 21 each seconds taken 10 images by the camera lens of camera head 2, then be 0.1 second the blanking time of camera head 2 shootings, promptly every at a distance from 0.1 second, and the camera lens 21 of camera head 2 is taken an image.
Step S2, dynamic area detecting module 202 is detected the dynamic area in the image that obtains, and idiographic flow is following:
(1) dynamic area detecting module 202 obtains the image of a very first time of said monitored object;
(2) dynamic area detecting module 202 calculates the characteristic value of the image of the said very first time; And the characteristic value of the image of the very first time is stored in the said memory 22; In the present embodiment, said characteristic value is a kind of numerical value that obtains through Fourier transform in color characteristic, geometric properties and the textural characteristics of image;
(3) dynamic area detecting module 202 obtains said monitored object at an image with continuous one second time said very first time;
(4) dynamic area detecting module 202 calculates the characteristic value of the image of said second times, and the characteristic value of the image of the very first time is stored in the said memory 22;
(5) dynamic area detecting module 202 carries out fuzzy matching with the characteristic value of the image of the said very first time and second time through the mode of auto-associating, according to the characteristic value search of the image of said second time its with the zone that conforms to of the image of the very first time.In the present embodiment, the said zone that conforms to is meant that said adjacent two images (image of the image of the very first time and second time) carry out fuzzy matching through the mode of auto-associating, and its characteristic value is mutually unison in 80%～90% part;
(6) dynamic area detecting module 202 is accurately compared the said very first time with the characteristic value in the zone that conforms to of the image of second time, and the said very first time is denoted as the dynamic area with the characteristic value different portions in the zone that conforms to of the image of second time.
Step S3, dynamic area detecting module 202 judges whether to detect the dynamic area.If detect the dynamic area, execution in step S4; If do not detect the dynamic area, return step S2.
Step S4, lens regulating module 203 be according to the positional information of this dynamic area, obtains the new focal position of camera lens 21 of camera head 2.In the present embodiment, the camera lens 21 new focal position of said camera head 2 are meant the ad-hoc location (like center position) in this dynamic area.
Step S5, lens regulating module 203 are according to this new focal position, and Control Driver 23 is adjusted the focal position of camera lenses 21.Simultaneously, lens regulating module 203 can also amplify the focal length of (Zoom in) camera lens 21, make the image that obtains more greatly, more clear.
In the present embodiment, camera head of the present invention and dynamically focusing method thereof are used under the situation that camera head 2 moves and dynamically focus.Be appreciated that camera head of the present invention and the method for dynamically focusing also can be used under the motionless situation of camera head 2 and dynamically focuses.
The present invention is that example describes with the security monitoring field, and is same, and this method also can be applied to other association area, like filming image, save supervision etc. from damage.
What should explain at last is; Above embodiment is only unrestricted in order to technical scheme of the present invention to be described; Although the present invention is specified with reference to preferred embodiment; Those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention, and do not break away from the spirit and the scope of technical scheme of the present invention.
Claims (10)
1. camera head method of dynamically focusing is characterized in that this method comprises the steps:
Obtain the monitored object image of the continuous picked-up of camera lens of camera head;
In the image that obtains, detect the dynamic area; And
If detect the dynamic area, then the focal position with the camera lens of this camera head is adjusted into the ad-hoc location in this dynamic area.
2. the camera head as claimed in claim 1 method of dynamically focusing is characterized in that, said in the image that obtains the step of detecting dynamic area comprise:
Obtain the image of a very first time of said monitored object;
The characteristic value of calculating and storing the image of the said very first time;
Obtain the image of one second time of said monitored object;
The characteristic value of calculating and storing the image of said second time;
The characteristic value of the image of the said very first time and second time is carried out fuzzy matching, according to the characteristic value search of the image of said second time its with the zone that conforms to of the image of the very first time;
The said very first time is accurately compared with the characteristic value in the zone that conforms to of the image of second time, the said very first time is denoted as the dynamic area with the characteristic value different portions in the zone that conforms to of the image of second time.
3. the camera head as claimed in claim 2 method of dynamically focusing is characterized in that, said characteristic value is a kind of numerical value that obtains through Fourier transform in color characteristic, geometric properties and the textural characteristics of image.
4. the camera head as claimed in claim 2 method of dynamically focusing; It is characterized in that; The said zone that conforms to is meant that the image of the said very first time and second time carries out fuzzy matching through the mode of auto-associating, and its characteristic value is mutually unison in 80%～90% part.
5. the camera head as claimed in claim 1 method of dynamically focusing is characterized in that the ad-hoc location in this dynamic area is meant the central point position of this dynamic area.
6. a camera head is characterized in that, this camera head comprises:
Camera lens;
Memory;
One or more processors; And
One or more modules, said one or more modules are stored in the said memory and are configured to and carried out by said one or more processors, and said one or more modules comprise:
Image collection module, the camera lens that is used to obtain camera head is the monitored object image of picked-up continuously;
The dynamic area detecting module is used for detecting the dynamic area at the image that obtains; And
Lens regulating module is used for when detecting the dynamic area, and the focal position of the camera lens of this camera head is adjusted into the ad-hoc location in this dynamic area.
7. camera head as claimed in claim 6 is characterized in that, said dynamic area detecting module is detected the dynamic area and comprised in the image that obtains:
Obtain the image of a very first time of said monitored object;
The characteristic value of calculating and storing the image of the said very first time;
Obtain the image of one second time of said monitored object;
The characteristic value of calculating and storing the image of said second time;
The characteristic value of the image of the said very first time and second time is carried out fuzzy matching, according to the characteristic value search of the image of said second time its with the zone that conforms to of the image of the very first time;
The said very first time is accurately compared with the characteristic value in the zone that conforms to of the image of second time, the said very first time is denoted as the dynamic area with the characteristic value different portions in the zone that conforms to of the image of second time.
8. camera head as claimed in claim 7 is characterized in that, said characteristic value is a kind of numerical value that obtains through Fourier transform in color characteristic, geometric properties and the textural characteristics of image.
9. camera head as claimed in claim 8 is characterized in that, the said zone that conforms to is meant that the image of the said very first time and second time carries out fuzzy matching through the mode of auto-associating, and its characteristic value is mutually unison in 80%～90% part.
10. camera head as claimed in claim 6 is characterized in that, the ad-hoc location in this dynamic area is meant the central point position of this dynamic area.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105385089A CN102469247A (en) | 2010-11-09 | 2010-11-09 | Photographic device and dynamic focusing method thereof |
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| CN2010105385089A CN102469247A (en) | 2010-11-09 | 2010-11-09 | Photographic device and dynamic focusing method thereof |
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| CN102469247A true CN102469247A (en) | 2012-05-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103780841A (en) * | 2014-01-23 | 2014-05-07 | 深圳市金立通信设备有限公司 | Shooting method and shooting device |
| CN106878616A (en) * | 2017-02-23 | 2017-06-20 | 惠州Tcl移动通信有限公司 | A kind of method and system that an action shot focus is automatically determined based on mobile terminal |
| CN111862508A (en) * | 2020-06-22 | 2020-10-30 | 深圳中兴网信科技有限公司 | Monitoring method, monitoring device and computer-readable storage medium |
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| CN103780841A (en) * | 2014-01-23 | 2014-05-07 | 深圳市金立通信设备有限公司 | Shooting method and shooting device |
| CN106878616A (en) * | 2017-02-23 | 2017-06-20 | 惠州Tcl移动通信有限公司 | A kind of method and system that an action shot focus is automatically determined based on mobile terminal |
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| CN111862508A (en) * | 2020-06-22 | 2020-10-30 | 深圳中兴网信科技有限公司 | Monitoring method, monitoring device and computer-readable storage medium |
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Application publication date: 20120523 |