CN202602794U - Automatic focus integrated camera device - Google Patents
Automatic focus integrated camera device Download PDFInfo
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- CN202602794U CN202602794U CN201220224364.4U CN201220224364U CN202602794U CN 202602794 U CN202602794 U CN 202602794U CN 201220224364 U CN201220224364 U CN 201220224364U CN 202602794 U CN202602794 U CN 202602794U
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Abstract
The utility model relates to an automatic focus integrated camera device. An aperture control unit is connected with a digital signal processor (DSP) image processing unit through a charge coupled device (CCD) image imaging unit, the DSP image processing unit is connected with the aperture control unit through a pulse-width modulation (PWM) output and focus control output unit and an aperture drive and focusing lens group drive unit, the DSP image processing unit and the PWM output and focus control output unit are connected with a central processing unit (CPU) through a communication interface unit; the CCD image imaging unit is used for transmitting a shoot object from a camera lens unit to a CCD, converting the shoot object into electronic signals in pixels and outputting video signals; and the DSP image processing unit is used for achieving automatic focus algorithms and control, determines moving direction of a focusing lens group through calculation and comparison of image resolution, and transmits signals to a motor drive module for control. The automatic focus integrated camera device has the advantage that on the premise that real-time performance can be met, more stable automatic control of apertures and focuses is achieved.
Description
Technical field
The utility model relates to the video camera automatic control equipment, mainly is a kind of self-focusing integrated camera device.
Background technology
Along with development of digital image, the video camera of increasing automatic control equipment depends on image processing algorithm, rather than some active range findings, metering system.Theoretical according to image processing, the high fdrequency component of image has reflected the sharpness information of present image, the average illumination information of low frequency component reflection.Compare with focusing with the auto iris of ordinary camera, monitoring camera requires higher to focusing speed and precision and control thereof.
The utility model content
The purpose of the utility model will overcome the deficiency of above-mentioned technology just, and a kind of self-focusing integrated camera device is provided.
The utility model solves the technical scheme that its technical problem adopts.This self-focusing integrated camera device comprises that aperture control unit, Zoom optic lens unit, ccd image image-generating unit, DSP graphics processing unit, PWM output and focus control output unit, aperture drive and focus lens group driver element, lens unit and communications interface unit; The aperture control unit is connected with the DSP graphics processing unit through the ccd image image-generating unit; The DSP graphics processing unit drives with focus control output unit, aperture through PWM output and is connected with the aperture control unit with the focus lens group driver element, and DSP graphics processing unit, PWM output are connected with CPU through communications interface unit with the focus control output unit; It is the electronic signal of unit that the ccd image image-generating unit is used for reference object is reached photo-sensitive cell and converted it into the pixel by lens unit, and exports this vision signal; The DSP graphics processing unit is used for auto-focusing algorithm and control realizes, through calculating and the contrast to image definition, confirms the direction that focus lens group moves, and this signal is passed to motor drive module controls.
Described aperture control unit comprises aperture, driver element and lens unit, through the SPI interface control step motor drive ic of DSP, drives moving of condenser lens unit, and the adjusting of time for exposure.
The effect that the utility model is useful is: compare with existing automatic-focusing camera, can satisfy under the prerequisite of real-time performance, realize more stable aperture and focus on control automatically.According to the camera apparatus of this device for the basis.The aperture autocontrol method of realizing is the characteristic estimated value that aperture amplifies or dwindles with picture signal mean flow rate energy and low frequency component; Differential power and high fdrequency component with picture signal are the characteristic estimated value that focuses on definition; Adopted the computational methods of spatial domain and frequency domain to guarantee to brightness and the reliable evaluation that focuses on definition.The aperture automatic control equipment is except that calculating the brightness estimated value, and through digital signal processor (DSP) output pulse debug signal, control aperture drive circuit changes the size of aperture.And the eigenvalue calculation of definition is used for Stepping Motor Control, realizes the control that moves forward and backward of optical zoom lens, makes imaging be in the most clear position of focusing.In conjunction with communication interface and control protocol, realize camera apparatus.
Description of drawings
Fig. 1 is that the systematic square frame of the utility model connects sketch map.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with for example.Should be appreciated that described hereinly, and be not used in qualification the utility model for example only in order to explaining the utility model.
Fig. 1 has showed the concrete structure of the controlling automatically video camera of the utility model.Native system comprises imaging, signal processing, auto focus control and communication interface and 4 major parts of agreement.
Imaging moiety comprises: iris ring unit, variable times the relevant driver element in Zoom optic lens unit, ccd image sensor unit, imaging processing DSP unit, camera lens.
The iris ring unit comprises circuit such as Hall element, damping coil, aperture size driving; Through calculating the size of mean flow rate and low frequency intensity; The duty of the pwm signal of control DSP output is frequency when, and rectification output reaches different driving forces, is able to control aperture size.
Variable times Zoom optic lens unit comprises focus lens group and the stepping motor that is used to drive set of lenses, is used to stop the infrared filter of infrared incident light, and drive circuit.
The ccd image sensor unit is reached reference object photo-sensitive cell and converted it into the pixel by lens unit is the electronic signal of unit, and exports this vision signal.
The lens driving unit through the SPI interface control step motor drive ic of DSP, drives moving of focus lens group, and the adjusting of time for exposure etc.
Image processing section comprises the camera signal processing unit; Be used for the analog signal that ccd sensor spreads out of is converted into digital signal through A/D; To digital signal correct, AWB etc., after handling its output format according to digital picture is exported.
Auto focus control partly comprises the DSP graphics processing unit, is responsible for automatic focus (AF) algorithm and control realization.The DSP module is confirmed the direction that focus lens group moves through to the calculating and the contrast of image definition, and this signal is passed to motor drive module controls.
Video camera with above equipment disposition can form vision signal clearly with extraneous scenery, and exports it to communication interface output.
Being used for mean flow rate calculates and the aperture control method
Mean flow rate has reflected the intensity of illumination of current scene image, and the size of this intensity and aperture has direct relation, and relevant with the gain of signal processing circuit.Obtain the average brightness value of image through direct calculating, can know whether the size of current aperture is in the optimum position.As: brightness range is between [0,255], and then value is the brightness range an of the best in [125,175], regulates aperture size, makes brightness be in this value range.
The control method of aperture: DSP output pwm signal, the target aperture size of regulating as required, the pulsewidth of control pwm signal, and duty ratio; Also can realize simultaneously, call DSP different programs module and just can realize through regulating frequency.Pwm signal is input to a current rectifying and wave filtering circuit, obtains the big or small position that corresponding driving control level control aperture is in target.
Be used for sharpness computation and focusing lens group control method
The calculating of definition mainly relies on the estimation to differential power and high-frequency energy, the first-order difference of main calculated level of this method and vertical pixel, and get each pixel energy sum, calculate the energy of high fdrequency component simultaneously at transform domain, and get the weighted sum of the two.Weight coefficient is between [0,1].
The fast algorithm of definition, the single-instruction multiple-data stream (SIMD) assembly instruction of employing DSP, an instruction can be handled the difference of four pixels, and adopts alignment techniques.
At last, should be pointed out that above instance only is the more representational example of the utility model.Obviously; The technical scheme of the utility model is not limited to above-mentioned instance; Many distortion can also be arranged, and all distortion that those of ordinary skill in the art can directly derive or associate from the disclosed content of the utility model all should be thought the protection range of the utility model.
Claims (2)
1. a self-focusing integrated camera device is characterized in that: comprise that aperture control unit, Zoom optic lens unit, ccd image image-generating unit, DSP graphics processing unit, PWM output and focus control output unit, aperture drive and focus lens group driver element, lens unit and communications interface unit; The aperture control unit is connected with the DSP graphics processing unit through the ccd image image-generating unit; The DSP graphics processing unit drives with focus control output unit, aperture through PWM output and is connected with the aperture control unit with the focus lens group driver element, and DSP graphics processing unit, PWM output are connected with CPU through communications interface unit with the focus control output unit; It is the electronic signal of unit that the ccd image image-generating unit is used for reference object is reached photo-sensitive cell and converted it into the pixel by lens unit, and exports this vision signal; The DSP graphics processing unit is used for auto-focusing algorithm and control realizes, through calculating and the contrast to image definition, confirms the direction that focus lens group moves, and this signal is passed to motor drive module controls.
2. self-focusing integrated camera device according to claim 1; It is characterized in that: described aperture control unit comprises aperture, driver element and lens unit; SPI interface control step motor drive ic through DSP; Drive moving of condenser lens unit, and the adjusting of time for exposure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220224364.4U CN202602794U (en) | 2012-05-17 | 2012-05-17 | Automatic focus integrated camera device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201220224364.4U CN202602794U (en) | 2012-05-17 | 2012-05-17 | Automatic focus integrated camera device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104184964A (en) * | 2013-05-20 | 2014-12-03 | 全视科技有限公司 | imaging system and method of focusing image sensor |
| CN105959528A (en) * | 2016-07-09 | 2016-09-21 | 深圳市辰卓科技有限公司 | Working scene switching method and apparatus and test device |
| WO2017157154A1 (en) * | 2016-03-16 | 2017-09-21 | 中兴通讯股份有限公司 | Auto-focusing method and apparatus |
| CN107613220A (en) * | 2017-09-30 | 2018-01-19 | 深圳市艾特智能科技有限公司 | Camera aperture drive circuit |
| CN108135452A (en) * | 2015-10-29 | 2018-06-08 | 奥林巴斯株式会社 | Photographic device and endoscopic system |
| US10015388B2 (en) | 2013-05-20 | 2018-07-03 | Omnivision Technologies, Inc. | Image sensor with fast intra-frame focus |
| CN110572589A (en) * | 2018-05-18 | 2019-12-13 | 杭州海康威视数字技术股份有限公司 | Aperture control method and image pickup apparatus |
| CN111064903A (en) * | 2018-10-16 | 2020-04-24 | 浙江宇视科技有限公司 | Aperture control method and device |
| CN114500863A (en) * | 2022-01-24 | 2022-05-13 | 惠州同为数码科技有限公司 | Motor drive control method for P-IRIS aperture of camera |
| CN115482291A (en) * | 2022-03-31 | 2022-12-16 | 华为技术有限公司 | Calibration method, calibration system, shooting method, electronic device and storage medium |
-
2012
- 2012-05-17 CN CN201220224364.4U patent/CN202602794U/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104184964B (en) * | 2013-05-20 | 2017-12-01 | 豪威科技股份有限公司 | Imaging system and the method for focusing on imaging sensor |
| US10015388B2 (en) | 2013-05-20 | 2018-07-03 | Omnivision Technologies, Inc. | Image sensor with fast intra-frame focus |
| CN104184964A (en) * | 2013-05-20 | 2014-12-03 | 全视科技有限公司 | imaging system and method of focusing image sensor |
| US10863892B2 (en) | 2015-10-29 | 2020-12-15 | Olympus Corporation | Imaging device and endoscope system |
| CN108135452A (en) * | 2015-10-29 | 2018-06-08 | 奥林巴斯株式会社 | Photographic device and endoscopic system |
| CN108135452B (en) * | 2015-10-29 | 2020-06-16 | 奥林巴斯株式会社 | Imaging device and endoscope system |
| WO2017157154A1 (en) * | 2016-03-16 | 2017-09-21 | 中兴通讯股份有限公司 | Auto-focusing method and apparatus |
| CN105959528A (en) * | 2016-07-09 | 2016-09-21 | 深圳市辰卓科技有限公司 | Working scene switching method and apparatus and test device |
| CN105959528B (en) * | 2016-07-09 | 2019-04-16 | 深圳市辰卓科技有限公司 | Operative scenario switching method, device and test equipment |
| CN107613220A (en) * | 2017-09-30 | 2018-01-19 | 深圳市艾特智能科技有限公司 | Camera aperture drive circuit |
| CN107613220B (en) * | 2017-09-30 | 2023-12-19 | 深圳市艾特智能科技有限公司 | Camera diaphragm driving circuit |
| CN110572589A (en) * | 2018-05-18 | 2019-12-13 | 杭州海康威视数字技术股份有限公司 | Aperture control method and image pickup apparatus |
| CN111064903B (en) * | 2018-10-16 | 2022-03-11 | 浙江宇视科技有限公司 | Aperture control method and device |
| CN111064903A (en) * | 2018-10-16 | 2020-04-24 | 浙江宇视科技有限公司 | Aperture control method and device |
| CN114500863A (en) * | 2022-01-24 | 2022-05-13 | 惠州同为数码科技有限公司 | Motor drive control method for P-IRIS aperture of camera |
| CN115482291A (en) * | 2022-03-31 | 2022-12-16 | 华为技术有限公司 | Calibration method, calibration system, shooting method, electronic device and storage medium |
| CN115482291B (en) * | 2022-03-31 | 2023-09-29 | 华为技术有限公司 | Calibration method, calibration system, shooting method, electronic device and storage medium |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121212 Termination date: 20130517 |