CN103475805A - Active range focusing system and active range focusing method - Google Patents
Active range focusing system and active range focusing method Download PDFInfo
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- CN103475805A CN103475805A CN2012101866892A CN201210186689A CN103475805A CN 103475805 A CN103475805 A CN 103475805A CN 2012101866892 A CN2012101866892 A CN 2012101866892A CN 201210186689 A CN201210186689 A CN 201210186689A CN 103475805 A CN103475805 A CN 103475805A
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Abstract
Disclosed are an active range focusing system and an active range focusing method for a digital camera. The digital camera comprises a depth camera lens, an automatic focusing device and a display screen. The system comprises a camera starting module, a focus selection module, a focal length calculating module and an automatic focusing module. According to the method, scene Z-direction depth-of-filed information acquired by the depth camera lens is directly utilized to confirm information about the distance between the depth camera lens and a corresponding scene location point at a focus position and calculate a shooting location point on which the depth camera lens is adjusted to focus, and the depth camera lens is automatically adjusted to a focal length shooting position to enable the digital camera to be more accurate in focusing adjustment and improve the image shooting effect.
Description
Technical field
The present invention relates to a kind of focusing system and method, particularly about a kind of active apart from focusing system and method in conjunction with degree of depth video camera.
Background technology
Digital camera (Digital Camera) is that a kind of electronic sensor that utilizes converts optical image in the camera of electronic data.When being taken, generally need to adjust the distance between camera lens and photosensory assembly, allow the process that subject can blur-free imaging be just the focusing operation.Can take easily, rapidly image clearly for convenience of the user, how digital camera has possessed the function of automatic focusing, can initiatively for the user, want shooting picture analyzed, and adjusts the focal position of camera lens.The automatic focusing function that current commercially available digital camera possesses, generally be divided into active focusing and two kinds of focusing modes of passive type focusing.
Active focusing mode is launched a range finding ray (for example infrared ray) by camera, and camera is determined the distance of subject again according to the ray signal reflected, and adjustable lens, complete the operation of automatic focusing automatically.Though this kind of automatic focusing mode is easier to realize, reaction speed is fast and cost is low, but reflector (such as glass etc.) appears before the subject, camera may the correct decision focal position, and the focusing position in image is also more nonelastic, the camera operation of only being found range, focus for the picture center position.If the user very is not familiar with the focusing skill of camera, the non-picture center position that is positioned at of composition emphasis, occur just easily produce the wrong situation of focusing, can't clap to obtain image frame clearly.
Passive type focusing mode is to utilize the digitized image of camera lens acquisition, calculate image difference value or the defined definition values of image Grad, then the eyeglass of moving lens change focal length, finding definition is peaked image space, as the position of best focusing, imaging goes out image the most clearly.The advantage of passive type focusing mode is that self does not need to launch distance measuring light beam, can focus by transparent barriers things such as glass, the focal position that also can provide the user to select voluntarily to want shot object, select than tool elasticity in the focal position of filmed image, and not limited fixing central focal position.Yet this kind of automatic focusing mode is high for the brightness in environment, color and luster contrast requirement degree, therefore, at image difference degree such as low-light (level)s, under low condition, just be difficult to accurate focusing.
Summary of the invention
In view of above content, be necessary to provide a kind of the active apart from focusing system and method for digital camera that be applied to, in conjunction with degree of depth video camera active accommodation lens focus camera site, can make digital camera accurately complete the lens focusing adjusting operation, improve the shooting effect of image.
Describedly actively apart from focusing system, install and run in digital camera, this digital camera comprises degree of depth camera lens, automatic focusing mechanism and display screen.This is active comprises apart from focusing system: camera starts module, for starting the function setting operation interface of digital camera, and the operation of focusing of the degree of depth focus function of selecting focal modes to open digital camera by this function setting operation interface; Focus is selected module, for being adjusted to, degree of depth camera lens wants the photographed scene position, and by the imaging of photographed scene picture to display screen, select to want the camera lens focal position in photographed scene on the photographed scene picture shown at display screen, and continue by the degree of depth camera lens XY direction real-time imaging picture and the Z direction depth of view information that photographed scene is wanted in picked-up; The focal length computing module, obtain the distance between the corresponding scene location point in camera lens focal position for the Z direction depth of view information of the wish photographed scene location point according to having absorbed, and calculate the best shooting focal length position of the required focusing of degree of depth camera lens according to the distance of obtaining; Automatic focusing module, adjust degree of depth camera lens to best shooting focal length position automatically for utilizing automatic focusing mechanism.
Described active apart from focusing method, be applied in digital camera, this digital camera comprises degree of depth camera lens, automatic focusing mechanism and display screen.The method comprising the steps of: start the function setting operation interface of digital camera, the operation of focusing of the degree of depth focus function of selecting focal modes to open digital camera by this function setting operation interface; Degree of depth camera lens is adjusted to and wants the photographed scene position, and by the imaging of photographed scene picture to display screen; Select to want the camera lens focal position in photographed scene on the photographed scene picture shown at display screen; Continue by the degree of depth camera lens XY direction real-time imaging picture and the Z direction depth of view information that photographed scene is wanted in picked-up; Obtain the distance between the corresponding scene location point in camera lens focal position according to the Z direction depth of view information of wanting the photographed scene location point; According to the position of the best shooting focal length apart from the required focusing of compute depth camera lens obtained; Utilize automatic focusing mechanism automatically to adjust degree of depth camera lens to best shooting focal length position.
Compared to prior art, the active Z direction depth of view information of utilizing degree of depth camera lens picked-up the place ahead each location point of scene apart from focusing system and method for the present invention, not only can allow the user click voluntarily the focal position of wanting photographed scene in image on display screen, be not limited to optical center and put the restriction of single position, and can make the focusing of digital camera operate not because of impacts such as ambient light, brightness, and then make on the focusing adjusting operation of digital camera more accurately, improve the filming image effect.
The accompanying drawing explanation
Fig. 1 is the active Organization Chart apart from the focusing system preferred embodiment of digital camera of the present invention.
Fig. 2 is the active flow chart apart from the focusing method preferred embodiment of digital camera of the present invention.
Fig. 3 is the schematic diagram of the function setting operation interface of digital camera.
Fig. 4 confirms the schematic diagram of degree of depth camera lens shooting situation by the display screen on digital camera.
Fig. 5 is the schematic diagram that clicks the camera lens focal position of shooting on the display screen of digital camera.
Fig. 6 adjusts the schematic diagram of best shooting focal length position according to the selected camera lens of user focal position.
The main element symbol description
Active apart from focusing system 10
Camera starts module 101
Focus is selected module 102
Focal length computing module 103
Degree of depth camera lens 11
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
As shown in Figure 1, be the active Organization Chart apart from focusing system 10 preferred embodiments of the present invention.In the present embodiment, describedly actively apart from focusing system 10, install and run in digital camera (Digital Camera) 1, can active accommodation lens focus camera site, make digital camera 1 accurately complete the lens focusing adjusting operation, improve the shooting effect of image.This digital camera 1 also include but not limited to, degree of depth camera lens (Depth-sensing Camera Lens) 11, automatic focusing mechanism 12, display screen 13, storage device 14 and microprocessor 15.
The TOF(Time of Flight that described degree of depth camera lens 11 is a kind of 3D of having camera functions) camera device, can obtain subject in the real-time imaging information of horizontal direction (XY direction), also can obtain depth direction (Z direction) range information of subject image each point apart from camera lens.This degree of depth camera lens 11 utilizes illumination for subject transmitted-reference light beam, carry out the distance transform between video camera and subject by time difference or the phase difference that calculates Returning beam, and then produce one group of depth distance information, i.e. Z direction range information.
Described automatic focusing mechanism 12 is for automatically adjusting the best shooting focal length position of degree of depth camera lens 11.Described display screen 13 is a kind of touch LED screens, and the user can complete filming image by the operation such as clicking.Described microprocessor 15 is a kind of primary control program chips (MCU), can carry out the operations such as photometry computing, exposure control, flash of light control and shooting logic control.
In the present embodiment, describedly actively apart from focusing system 10, comprise that camera starts module 101, focus is selected module 102, focal length computing module 103 and automatic focusing module 104.The alleged module of the present invention means a kind of can be by microprocessor 15 performed and can complete the sequence of program instructions section of fixed function, and it is stored in storage device 14, about the function of each module, will in the flow chart of Fig. 2, be described specifically.
Shown in figure 2, it is the active flow chart apart from the focusing method preferred embodiment that the present invention is applied to digital camera 1.In the present embodiment, the method can active accommodation lens focus camera site, makes digital camera 1 accurately complete the lens focusing adjusting operation, improves the shooting effect of image.
Step S21, camera starts the function setting operation interface that module 101 starts digital cameras 1, the operation of focusing of the degree of depth focus function of selecting focal modes to open digital camera 1 by this function setting operation interface.Shown in figure 3, after the user opens digital camera 1, described camera starts module 101 and starts the function setting operation interface of digital camera 1 and this function setting operation interface is presented on display screen 13, the user clicks focal modes by the function setting operation interface and carrys out the selected depth focus function, camera starts the degree of depth focus function that module 101 is opened digital cameras 1, and the user can use the operation of focusing of this degree of depth focus function in the process of taking pictures.
Step S22, focus selects module 102 that the degree of depth camera lens 11 of digital camera 1 is adjusted to and wants the photographed scene position, and by the imaging of photographed scene picture to display screen 13, confirm the scene coverage for the user.Shown in figure 4, suppose that the user wants in photographed scene the fruit image frames such as apple, orange and banana that comprise different distance, described focus selects module 102 first the degree of depth camera lens 11 of digital camera 1 to be adjusted to appropriate location, the fruit image frame is shown on screen 13, for the user, confirms that coverage comprises the fruit image frames such as apple, orange and banana really.
Step S23, after the user confirms the photographed scene scope, click the camera lens focal position of wanting in photographed scene in the photographed scene picture that the user selects module 102 to show at display screen 13 by focus.In the present embodiment, the user, carry out in the degree of depth camera lens 11 camera site adjusting operations of digital camera 1, can in display screen 13, see a focal position (as the square frame mark of Fig. 5 sign), after the user completes degree of depth camera lens 11 camera site adjusting operations, the user can click voluntarily, determine to want in image the focal position of photographed on display screen 13, as the foundation of image focusing operation.
Step S24, focus selects module 102 to continue by degree of depth camera lens 11 XY direction real-time imaging picture and the Z direction depth of view information that photographed scene is wanted in picked-up the place ahead.In the present embodiment, in the user, adjust in the camera site process of degree of depth camera lens 11, focus selects module 102 to continue to obtain by degree of depth camera lens 11 XY direction real-time imaging picture and the Z direction depth of view information thereof of the place ahead scene, obtain the fruit image frames such as apple in scene, orange and banana, and degree of depth camera lens 11 between each fruit apart from depth of view information.
Step S25, focal length computing module 103 obtains the distance between the corresponding scene location point in camera lens focal position according to the Z direction depth of view information of acquired each location point of scene.In the present embodiment, person to be used is by after confirming the image frame of wanting to find a view and clicking the focal position of wish shooting on display screen 13, focal length computing module 103 will carry out the photometry computing by microprocessor 15, exposure is controlled and the operations such as logic control are controlled and taken in flash of light, and the Z direction depth of view information of the focal position clicked according to the user and acquired each location point of scene of degree of depth camera lens 11, obtain degree of depth camera lens 11 to the distance between the corresponding scene location point in focal position.
Step S26, focal length computing module 103 calculates the best shooting focal length position of degree of depth camera lens 11 required focusings according to the distance of obtaining.In the present embodiment, when focal length computing module 103 obtain degree of depth camera lens 11 to focal position between corresponding scene location point the distance after, the best shooting focal length position that can extrapolate the required adjustment of degree of depth camera lens 11, focusing.
Step S27, automatic focusing module 104 utilizes the automatic focusing mechanism 12 of digital camera 1 automatically to adjust degree of depth camera lens 11 to best shooting focal length position.In the present embodiment, automatic focusing module 104 will with automatic focusing mechanism 12 automatically adjust degree of depth camera lens 11 to this apart from best shooting focal length position.
Step S28, after degree of depth camera lens 11 is adjusted to best shooting focal length position automatically, the user presses the shutter key of digital camera 1, and digital camera 1 utilizes degree of depth camera lens 11 to shoot scene image picture clearly under this best shooting focal length position.
Shown in figure 6, if it is the camera lens focal position that the user clicks the apple position on display screen 13, digital camera 1 just can absorb in scene all fruit image frames that comprise apple, but, because camera lens focus now is positioned on apple, can obtain the apple sharp image picture that focuses on apple.If the user clicks orange on display screen 13 or the banana equipotential is set to the camera lens focal position, digital camera 1 can absorb comprise orange and banana in scene all fruit image frames, but, because camera lens focus now is positioned on orange or banana, can obtain the orange or the banana sharp image picture that focus on orange or banana.
Above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to above preferred embodiment, the present invention is had been described in detail, those of ordinary skill in the art should be appreciated that to modify or to be equal to replacement technical scheme of the present invention and should not break away from the spirit and scope of technical solution of the present invention.
Claims (10)
- One kind active apart from focusing system, install and run in digital camera, this digital camera comprises degree of depth camera lens, automatic focusing mechanism and display screen, it is characterized in that, described actively comprise apart from focusing system:Camera starts module, for starting the function setting operation interface of digital camera, and the operation of focusing of the degree of depth focus function of selecting focal modes to open digital camera by this function setting operation interface;Focus is selected module, for being adjusted to, degree of depth camera lens wants the photographed scene position, and by the imaging of photographed scene picture to display screen, select to want the camera lens focal position in photographed scene on the photographed scene picture shown at display screen, and continue by the degree of depth camera lens XY direction real-time imaging picture and the Z direction depth of view information that photographed scene is wanted in picked-up;The focal length computing module, obtain the distance between the corresponding scene location point in camera lens focal position for the Z direction depth of view information of the wish photographed scene location point according to having absorbed, and calculate the best shooting focal length position of the required focusing of degree of depth camera lens according to the distance of obtaining; AndAutomatic focusing module, adjust degree of depth camera lens to best shooting focal length position automatically for utilizing automatic focusing mechanism.
- 2. as claimed in claim 1 active apart from focusing system, it is characterized in that, described active apart from focusing system, wherein, after degree of depth camera lens is adjusted to described best shooting focal length position automatically, utilize degree of depth camera lens to shoot scene image picture clearly under this best shooting focal length position.
- 3. as claimed in claim 1 active apart from focusing system, it is characterized in that, described degree of depth camera lens is a kind of 3D camera device that has, the Z direction depth of view information for the XY direction image information of obtaining subject in the scene image scope and subject apart from degree of depth camera lens.
- 4. as claimed in claim 1 active apart from focusing system, it is characterized in that, described display screen is a kind of touch LED screen, the user completes the filming image of wanting photographed scene by a selection operation.
- 5. as claimed in claim 1 active apart from focusing system, it is characterized in that, described digital camera also comprises microprocessor, and this processor is a kind of primary control program chip MCU, for digital camera, carries out photometry computing, exposure control, flash of light control and takes the logic control operation.
- One kind active apart from focusing method, be applied in digital camera, this digital camera comprises degree of depth camera lens, automatic focusing mechanism and display screen, it is characterized in that, the method comprising the steps of:Start the function setting operation interface of digital camera, the operation of focusing of the degree of depth focus function of selecting focal modes to open digital camera by this function setting operation interface;Degree of depth camera lens is adjusted to and wants the photographed scene position, and by the imaging of photographed scene picture to display screen;Select to want the camera lens focal position in photographed scene on the photographed scene picture shown at display screen;Continue by the degree of depth camera lens XY direction real-time imaging picture and the Z direction depth of view information that photographed scene is wanted in picked-up;Obtain the distance between the corresponding scene location point in camera lens focal position according to the Z direction depth of view information of the wish photographed scene location point absorbed;Calculate the best shooting focal length position of the required focusing of degree of depth camera lens according to the distance of obtaining; AndUtilize automatic focusing mechanism automatically to adjust degree of depth camera lens to best shooting focal length position.
- 7. as claimed in claim 6 active apart from focusing method, it is characterized in that, the method also comprises step:After degree of depth camera lens is adjusted to described best shooting focal length position automatically, utilize degree of depth camera lens to shoot scene image picture clearly under this best shooting focal length position.
- 8. as claimed in claim 6 active apart from focusing method, it is characterized in that, described degree of depth camera lens is a kind of 3D camera device that has, the Z direction depth of view information for the XY direction image information of obtaining subject in the scene image scope and subject apart from degree of depth camera lens.
- 9. as claimed in claim 6 active apart from focusing method, it is characterized in that, described display screen is a kind of touch LED screen, the user completes the filming image of wanting photographed scene by a selection operation.
- 10. as claimed in claim 6 active apart from focusing method, it is characterized in that, described digital camera also comprises microprocessor, and this processor is a kind of primary control program chip MCU, for digital camera, carries out photometry computing, exposure control, flash of light control and takes the logic control operation.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104023177A (en) * | 2014-06-04 | 2014-09-03 | 华为技术有限公司 | Camera control method, device and camera |
| CN104660904A (en) * | 2015-03-04 | 2015-05-27 | 深圳市欧珀通信软件有限公司 | Shooting subject recognition method and device |
| CN105744138A (en) * | 2014-12-09 | 2016-07-06 | 联想(北京)有限公司 | Quick focusing method and electronic equipment |
| CN105744163A (en) * | 2016-02-23 | 2016-07-06 | 湖南拓视觉信息技术有限公司 | Video camera and video recording method performing tracking focusing based on depth information |
| CN106341611A (en) * | 2016-11-29 | 2017-01-18 | 广东欧珀移动通信有限公司 | Control method, control device and electronic device |
| CN106412445A (en) * | 2016-11-29 | 2017-02-15 | 广东欧珀移动通信有限公司 | Control method, control device and electronic device |
| CN106412433A (en) * | 2016-10-09 | 2017-02-15 | 深圳奥比中光科技有限公司 | Automatic focusing method and system based on RGB-IR depth camera |
| CN106534629A (en) * | 2016-10-10 | 2017-03-22 | 珠海市广浩捷精密机械有限公司 | Lens and image sensor active focusing system and lens and image sensor active focusing method |
| CN106559528A (en) * | 2016-11-29 | 2017-04-05 | 广东欧珀移动通信有限公司 | Control method, control device and electronic installation |
| CN107301665A (en) * | 2017-05-03 | 2017-10-27 | 中国科学院计算技术研究所 | Depth camera and its control method with varifocal optical camera |
| CN111526282A (en) * | 2020-03-26 | 2020-08-11 | 香港光云科技有限公司 | Method and device for shooting with adjustable depth of field based on flight time |
| CN112954211A (en) * | 2021-02-08 | 2021-06-11 | 维沃移动通信有限公司 | Focusing method and device, electronic equipment and readable storage medium |
| CN113063352A (en) * | 2021-03-31 | 2021-07-02 | 深圳中科飞测科技股份有限公司 | Detection method and device, detection equipment and storage medium |
| CN113466339A (en) * | 2021-06-18 | 2021-10-01 | 之江实验室 | Ultrasonic scanning microscope global focusing method and device combined with depth camera |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104023177A (en) * | 2014-06-04 | 2014-09-03 | 华为技术有限公司 | Camera control method, device and camera |
| CN105744138A (en) * | 2014-12-09 | 2016-07-06 | 联想(北京)有限公司 | Quick focusing method and electronic equipment |
| CN105744138B (en) * | 2014-12-09 | 2020-02-21 | 联想(北京)有限公司 | Quick focusing method and electronic equipment |
| CN104660904A (en) * | 2015-03-04 | 2015-05-27 | 深圳市欧珀通信软件有限公司 | Shooting subject recognition method and device |
| CN105744163B (en) * | 2016-02-23 | 2019-01-25 | 湖南拓视觉信息技术有限公司 | A kind of video camera and image capture method based on depth information tracking focusing |
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| CN106412433A (en) * | 2016-10-09 | 2017-02-15 | 深圳奥比中光科技有限公司 | Automatic focusing method and system based on RGB-IR depth camera |
| CN106534629A (en) * | 2016-10-10 | 2017-03-22 | 珠海市广浩捷精密机械有限公司 | Lens and image sensor active focusing system and lens and image sensor active focusing method |
| CN106534629B (en) * | 2016-10-10 | 2019-05-07 | 珠海市广浩捷精密机械有限公司 | A kind of lens and imaging sensor active focusing system and method |
| CN106341611A (en) * | 2016-11-29 | 2017-01-18 | 广东欧珀移动通信有限公司 | Control method, control device and electronic device |
| CN106559528A (en) * | 2016-11-29 | 2017-04-05 | 广东欧珀移动通信有限公司 | Control method, control device and electronic installation |
| CN106412445A (en) * | 2016-11-29 | 2017-02-15 | 广东欧珀移动通信有限公司 | Control method, control device and electronic device |
| CN107301665A (en) * | 2017-05-03 | 2017-10-27 | 中国科学院计算技术研究所 | Depth camera and its control method with varifocal optical camera |
| CN111526282A (en) * | 2020-03-26 | 2020-08-11 | 香港光云科技有限公司 | Method and device for shooting with adjustable depth of field based on flight time |
| CN112954211A (en) * | 2021-02-08 | 2021-06-11 | 维沃移动通信有限公司 | Focusing method and device, electronic equipment and readable storage medium |
| CN113063352A (en) * | 2021-03-31 | 2021-07-02 | 深圳中科飞测科技股份有限公司 | Detection method and device, detection equipment and storage medium |
| CN113466339A (en) * | 2021-06-18 | 2021-10-01 | 之江实验室 | Ultrasonic scanning microscope global focusing method and device combined with depth camera |
| CN113466339B (en) * | 2021-06-18 | 2024-02-09 | 之江实验室 | Global focusing method and device of ultrasonic scanning microscope combined with depth camera |
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