CN104469169A - Phase ranging camera shooting module and automatic focusing method thereof - Google Patents
Phase ranging camera shooting module and automatic focusing method thereof Download PDFInfo
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Abstract
The invention provides a phase ranging camera shooting module and an automatic focusing method of the phase ranging camera shooting module. The phase ranging camera shooting module comprises a motor and a lens embedded into the motor. The phase ranging camera shooting module further comprises a phase ranging module, a control module and a drive module, wherein the phase ranging module is used for measuring the object distance between the camera shooting module and an object to be shot and sending the measured object distance to the control module. The control module is used for receiving the measured object distance, determining a corresponding drive command according to the corresponding relationship between the object distance and the motor drive command, and sending a corresponding control command to the drive module. The drive module is used for outputting the drive command to the motor after the control command is received, so that the motor drives the lens to move to a corresponding focusing position. By the adoption of the camera shooting module and the focusing method, focusing time is short, and the focusing speed is high.
Description
Technical field
The present invention relates to electronic technology field, more particularly, relate to a kind of phase ranging camera module and Atomatic focusing method thereof.
Background technology
What existing camera module adopted mostly is contrast formula focusing mode.So-called contrast formula focusing searches best focal point based on camera lens picture difference of imaging on diverse location, its focus process is: camera lens is driven by a motor and advances towards certain direction, when on lens moving to a certain position, the data analysis in certain region of present image is calculated, obtain the value of an energy Relative quantification definition, record the position of camera lens simultaneously, camera lens obtains one group of numerical value after being continued mobile multistage distance, find the lens location that the maximum of these group data is corresponding, drive camera lens to get back to this position, thus finally realize auto-focusing.
That is, this focusing mode is before most high-contrast being detected, and need the position of constantly adjustment camera lens, therefore, focusing time is longer, and focusing speed is slower.
Summary of the invention
In view of this, the invention provides a kind of phase ranging camera module and Atomatic focusing method thereof, adopt the focus camera module of mode auto-focusing of contrast formula to focus slow-footed problem to solve in prior art.
For achieving the above object, the invention provides following technical scheme:
A kind of phase ranging camera module, comprises motor and is embedded in the camera lens in described motor, also comprise:
Phase ranging module, the object distance of described measurement for measuring the object distance of camera module and object to be shot, and is sent to control module by described phase ranging module; Control module, for receiving the object distance of described measurement, determines the driving instruction corresponding with the object distance of described measurement according to object distance with the corresponding relation of motor driving instruction, and the control command of correspondence is sent to driver module;
Driver module, for after receiving described control command, exports described driving instruction to described motor, makes lens moving described in described motor driving to corresponding focusing position, realize auto-focusing.
Preferably, described control module also for the image of analyzing and processing shooting, and produces adjustment instruction according to the mass parameter of described image, and described adjustment instruction is sent to driver module;
Described driver module is also for lens moving described in motor driving according to described adjustment order-driven, and the distance of described lens moving after adjustment is fed back to described control module, to make the corresponding relation of object distance and motor driving instruction described in described control module correction.
Preferably, the corresponding relation of described object distance and motor driving instruction sets up according to the corresponding relation of the corresponding relation of object distance and camera lens distance to be moved and camera lens distance to be moved and motor driving instruction.
Preferably, the corresponding relation of described object distance and camera lens distance to be moved obtains according to focal length formula.
Preferably, the distance that described camera lens is to be moved and the corresponding relation of motor driving instruction are that the slope calculated according to the driving instruction of the long shot of camera module distance to be moved and measurement and close up shots distance to be moved and driving instruction obtains.
An Atomatic focusing method for phase ranging camera module, comprising:
Measure the object distance of camera module and object to be shot;
According to the corresponding relation of object distance and motor driving instruction, determine the driving instruction corresponding with the object distance of described measurement;
Export described driving instruction to motor, make described motor driving lens moving to corresponding focusing position, realize auto-focusing.
Preferably, also comprise:
Photographic images after described lens moving to focusing position, and the position adjusting described camera lens according to the mass parameter of described image;
The corresponding relation of object distance and motor driving instruction according to the distance correction of adjustment rear lens movement.
Compared with prior art, technical scheme provided by the present invention has the following advantages:
Phase ranging camera module provided by the present invention and Atomatic focusing method thereof, the distance that namely distance due to motor driving lens moving moves to focusing position is controlled by driving instruction, and driving instruction is determined by the corresponding relation of the object distance measured and object distance and motor driving instruction, therefore, camera module provided by the invention and Atomatic focusing method thereof, without the need to realizing auto-focusing by the position of repeatedly analysis image and moving lens repeatedly, focusing time is shorter, focusing speed.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The structural representation of the phase ranging camera module that Fig. 1 provides for one embodiment of the present of invention;
Linear relationship curve chart between the distance S that the camera lens that Fig. 2 provides for one embodiment of the present of invention is to be moved and motor driving instruction C;
The flow chart of the Atomatic focusing method of the phase ranging camera module that Fig. 3 provides for an alternative embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
An embodiment provides a kind of phase ranging camera module, comprise motor and be embedded in the camera lens in described motor, as shown in Figure 1, the camera module that the present embodiment provides also comprises phase ranging module 10, control module 20 and driver module 30.
Phase ranging module 10, described phase ranging module is for measuring the object distance of camera module and object to be shot, and the object distance of described measurement is sent to control module 20, this phase ranging module is a kind of photosensitive range finding chip, lens discrete phases detection system micro has arrived in the dot structure of imaging sensor by it, the lens of independent focusing assembly are replaced with the lenticule of Pixel surface, play the effect of camera lens beam separation by the half of photosensitive mode of pixel, replace CCD linear array with the combination of multiple pixel; Control module 20 is processor, for receiving the object distance of described measurement, determines the driving instruction corresponding with the object distance of described measurement according to object distance with the corresponding relation of motor driving instruction, and the control command of correspondence is sent to driver module 30; Driver module 30 is driving chip, for after receiving described control command, exports described driving instruction to described motor, makes lens moving described in described motor driving to corresponding focusing position, realize auto-focusing.
In the present embodiment, the corresponding relation of object distance and motor driving instruction sets up in advance and is stored in table form in control module 20, and it is set up according to the corresponding relation of the corresponding relation of object distance and camera lens distance to be moved and camera lens distance to be moved and motor driving instruction.
Wherein, the corresponding relation of described object distance and camera lens distance to be moved obtains according to focal length formula.After measurement obtains object distance, object distance substituted in focal length formula 1/F=1/H+1/V and calculate image distance, wherein, F is the focal length of camera module, and H is image distance, and V is object distance.Due to the difference that distance that camera lens is to be moved is image distance and focal length, and the focal length of camera module is fixing and known, therefore, can obtain the corresponding relation of object distance and camera lens distance to be moved according to focal length formula.
The corresponding relation of the distance that camera lens is to be moved and motor driving instruction obtains according to the driving instruction of the long shot of camera module distance to be moved and measurement and close up shots distance to be moved and driving instruction.
Because the distant view object distance of camera module is set as being positioned at unlimited distance, therefore, according to focal length formula, the image distance of distant view equals focal length, when namely taking distant view image, long shot distance S1 to be moved is zero, obtains driving instruction C1 when taking distant view image by actual photographed distant view image simultaneously.And the general 10cm of close shot object distance of camera module, therefore, after going out image distance according to focal length formulae discovery, close up shots distance S2 to be moved can be gone out according to the mathematic interpolation of image distance and focal length, obtain driving instruction C2 when taking close shot image by actual photographed close shot image simultaneously.
Draw the linearity curve between camera lens distance S motor driving instruction C to be moved according to (S1, C1) and (S2, C2), as shown in Figure 2, and calculate slope of a curve K, K=(S1-S2)/(C1-C2).The corresponding relation of camera lens distance to be moved and motor driving instruction can be obtained according to above-mentioned linearity curve.
Based on this, the corresponding relation of the corresponding relation of the distance to be moved according to camera lens and motor driving instruction and object distance and camera lens distance to be moved can obtain the corresponding relation of object distance and motor driving instruction, thus can after phase ranging module 10 records object distance, corresponding driving instruction can be determined with the corresponding relation of motor driving instruction according to object distance, thus CD-ROM drive motor drives described lens moving to corresponding focusing position, realizes auto-focusing.
In addition, the control module in the present embodiment also for the image of analyzing and processing shooting, and produces adjustment instruction according to the mass parameter of described image, and described adjustment instruction is sent to driver module; Driver module is lens moving described in motor driving according to described adjustment order-driven, and the distance of described lens moving after adjustment is fed back to described control module, to make the corresponding relation of object distance and motor driving instruction described in described control module correction.
The phase ranging camera module that the present embodiment provides, the distance that namely distance due to motor driving lens moving moves to focusing position is controlled by driving instruction, and driving instruction is determined by the corresponding relation of the object distance measured and object distance and motor driving instruction, therefore, the camera module that the present embodiment provides is without the need to realizing auto-focusing by the position of repeatedly analysis image and moving lens repeatedly, focusing time is shorter, speed.
An alternative embodiment of the invention provides a kind of Atomatic focusing method of phase ranging camera module, and its flow chart as shown in Figure 3, comprising:
S301: the object distance measuring camera module and object to be shot;
In the present embodiment, the object distance of camera module and object to be shot is measured by phase ranging module, this phase ranging module is a kind of photosensitive range finding chip, lens discrete phases detection system micro has arrived in the dot structure of imaging sensor by it, the lens of independent focusing assembly are replaced with the lenticule of Pixel surface, play the effect of camera lens beam separation by the half of photosensitive mode of pixel, replace CCD linear array with the combination of multiple pixel.
S302: according to the corresponding relation of object distance and motor driving instruction, determine the driving instruction corresponding with the object distance of described measurement;
Wherein, the corresponding relation of object distance and motor driving instruction sets up according to the corresponding relation of the corresponding relation of object distance and camera lens distance to be moved and camera lens distance to be moved and motor driving instruction.
After measurement obtains object distance, go out image distance according to focal length formulae discovery, and the difference of image distance and focal length is camera lens distance to be moved; Further, the driving instruction measured according to the long shot of camera module Distance geometry to be moved and close up shots Distance geometry driving instruction to be moved, after obtaining the corresponding relation of camera lens distance to be moved and motor driving instruction, the driving instruction corresponding with the object distance measured can be obtained.
S303: export described driving instruction to motor, makes described motor driving lens moving to corresponding focusing position, realizes auto-focusing.
After realizing auto-focusing, in order to avoid the existence of error, also need to detect focusing result, the Atomatic focusing method namely in the present embodiment also comprises: photographic images after described lens moving to focusing position, and the position adjusting described camera lens according to the mass parameter of described image; The corresponding relation of object distance and motor driving instruction according to the distance correction of adjustment rear lens movement.
The phase ranging camera module Atomatic focusing method that the present embodiment provides, the distance that namely distance due to motor driving lens moving moves to focusing position is controlled by driving instruction, and driving instruction is determined by the corresponding relation of the object distance measured and object distance and motor driving instruction, therefore, camera module Atomatic focusing method provided by the invention, without the need to realizing auto-focusing by the position of repeatedly analysis image and moving lens repeatedly, focusing time is shorter, speed.
Although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention.Any those of ordinary skill in the art, do not departing under technical solution of the present invention ambit, the Method and Technology content of above-mentioned announcement all can be utilized to make many possible variations and modification to technical solution of the present invention, or be revised as the Equivalent embodiments of equivalent variations.Therefore, every content not departing from technical solution of the present invention, according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belongs in the scope of technical solution of the present invention protection.
Claims (7)
1. a phase ranging camera module, comprises motor and is embedded in the camera lens in described motor, it is characterized in that, also comprise:
Phase ranging module, the object distance of described measurement for measuring the object distance of camera module and object to be shot, and is sent to control module by described phase ranging module;
Control module, for receiving the object distance of described measurement, determining the driving instruction corresponding with the object distance of described measurement according to object distance with the corresponding relation of driving instruction motor driving instruction, and described driving instruction is sent to driver module;
Driver module, for after receiving described driving instruction, exports described driving instruction to described motor, makes lens moving described in described motor driving to corresponding focusing position, realize auto-focusing.
2. camera module according to claim 1, is characterized in that, described control module also for the image of analyzing and processing shooting, and produces adjustment instruction according to the mass parameter of described image, and described adjustment instruction is sent to driver module;
Described driver module is also for lens moving described in motor driving according to described adjustment order-driven, and the distance of described lens moving after adjustment is fed back to described control module, to make the corresponding relation of object distance and motor driving instruction described in described control module correction.
3. camera module according to claim 2, it is characterized in that, the corresponding relation of described object distance and motor driving instruction sets up according to the corresponding relation of the corresponding relation of object distance and camera lens distance to be moved and camera lens distance to be moved and motor driving instruction.
4. camera module according to claim 3, is characterized in that, the corresponding relation of described object distance and camera lens distance to be moved obtains according to focal length formula.
5. camera module according to claim 4, it is characterized in that, the corresponding relation of the distance that described camera lens is to be moved and motor driving instruction is that the slope calculated according to the driving instruction of the long shot of camera module distance to be moved and measurement and close up shots distance to be moved and driving instruction obtains.
6. an Atomatic focusing method for phase ranging camera module, is characterized in that, comprising:
Measure the object distance of camera module and object to be shot;
According to the corresponding relation of object distance and motor driving instruction, determine the driving instruction corresponding with the object distance of described measurement;
Export described driving instruction to motor, make described motor driving lens moving to corresponding focusing position, realize auto-focusing.
7. method according to claim 6, is characterized in that, also comprises:
Photographic images after described lens moving to focusing position, and the position adjusting described camera lens according to the mass parameter of described image;
The corresponding relation of object distance and motor driving instruction according to the distance correction of adjustment rear lens movement.
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| CN104503188A (en) * | 2014-12-31 | 2015-04-08 | 信利光电股份有限公司 | Automatic focusing module and mobile equipment |
| CN105204269A (en) * | 2015-07-04 | 2015-12-30 | 魅族科技（中国）有限公司 | Laser-assisted focusing method and shooting device |
| CN105227835A (en) * | 2015-09-11 | 2016-01-06 | 浙江宇视科技有限公司 | A kind of assisted focused method and apparatus |
| CN105933590A (en) * | 2016-06-30 | 2016-09-07 | 广东欧珀移动通信有限公司 | Photographing processing method and device for intelligent terminal |
| CN106303192A (en) * | 2015-05-25 | 2017-01-04 | 小米科技有限责任公司 | Terminal control method and terminal |
| CN106603911A (en) * | 2016-11-29 | 2017-04-26 | 广东欧珀移动通信有限公司 | Control method, control apparatus, and electronic apparatus |
| CN106657770A (en) * | 2016-11-04 | 2017-05-10 | 上海斐讯数据通信技术有限公司 | Mobile terminal automatic focusing lens microspur value calculation method and system |
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| CN110381181A (en) * | 2019-06-28 | 2019-10-25 | 信利光电股份有限公司 | Future range inducing method, electronic device, storage medium and mobile terminal |
| WO2020125204A1 (en) * | 2018-12-20 | 2020-06-25 | Oppo广东移动通信有限公司 | Control method, control device, electronic device and medium |
| WO2020248609A1 (en) * | 2019-06-11 | 2020-12-17 | 杭州海康微影传感科技有限公司 | Method, apparatus and imaging device for focusing, and computer-readable storage medium |
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| CN104503188A (en) * | 2014-12-31 | 2015-04-08 | 信利光电股份有限公司 | Automatic focusing module and mobile equipment |
| CN106303192A (en) * | 2015-05-25 | 2017-01-04 | 小米科技有限责任公司 | Terminal control method and terminal |
| CN106303192B (en) * | 2015-05-25 | 2019-05-07 | 小米科技有限责任公司 | Terminal control method and terminal |
| CN105204269A (en) * | 2015-07-04 | 2015-12-30 | 魅族科技（中国）有限公司 | Laser-assisted focusing method and shooting device |
| CN105204269B (en) * | 2015-07-04 | 2018-11-13 | 魅族科技（中国）有限公司 | A kind of laser assisted focusing method and filming apparatus |
| CN105227835A (en) * | 2015-09-11 | 2016-01-06 | 浙江宇视科技有限公司 | A kind of assisted focused method and apparatus |
| CN105227835B (en) * | 2015-09-11 | 2018-09-18 | 浙江宇视科技有限公司 | A kind of assisted focused method and apparatus |
| CN105933590A (en) * | 2016-06-30 | 2016-09-07 | 广东欧珀移动通信有限公司 | Photographing processing method and device for intelligent terminal |
| CN105933590B (en) * | 2016-06-30 | 2019-01-15 | Oppo广东移动通信有限公司 | Processing method and processing device of taking pictures applied to intelligent terminal |
| CN106657770B (en) * | 2016-11-04 | 2019-11-29 | 上海斐讯数据通信技术有限公司 | The calculation method and system of mobile terminal autofocus lens microspur value |
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| CN106603911A (en) * | 2016-11-29 | 2017-04-26 | 广东欧珀移动通信有限公司 | Control method, control apparatus, and electronic apparatus |
| CN110012208A (en) * | 2018-01-05 | 2019-07-12 | 广东欧珀移动通信有限公司 | It takes pictures focusing method, device, storage medium and electronic equipment |
| CN110012208B (en) * | 2018-01-05 | 2020-08-04 | Oppo广东移动通信有限公司 | Photographing focusing method and device, storage medium and electronic equipment |
| WO2020125204A1 (en) * | 2018-12-20 | 2020-06-25 | Oppo广东移动通信有限公司 | Control method, control device, electronic device and medium |
| WO2020248609A1 (en) * | 2019-06-11 | 2020-12-17 | 杭州海康微影传感科技有限公司 | Method, apparatus and imaging device for focusing, and computer-readable storage medium |
| CN110381181A (en) * | 2019-06-28 | 2019-10-25 | 信利光电股份有限公司 | Future range inducing method, electronic device, storage medium and mobile terminal |
| CN112136310A (en) * | 2019-08-30 | 2020-12-25 | 深圳市大疆创新科技有限公司 | Focusing method and assembly of imaging device, imaging device and movable object |
| WO2021035704A1 (en) * | 2019-08-30 | 2021-03-04 | 深圳市大疆创新科技有限公司 | Focusing method and assembly for imaging apparatus, imaging apparatus and movable object |
| CN112313940A (en) * | 2019-11-14 | 2021-02-02 | 深圳市大疆创新科技有限公司 | Zooming tracking method and system, lens, imaging device and unmanned aerial vehicle |
| CN112333379A (en) * | 2020-09-17 | 2021-02-05 | 北京迈格威科技有限公司 | Image focusing method and device and image acquisition equipment |
| WO2024041438A1 (en) * | 2022-08-24 | 2024-02-29 | 华为技术有限公司 | Motor power supply method and electronic device |
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