CN204697170U - A kind of autofocus system and video monitoring equipment - Google Patents
A kind of autofocus system and video monitoring equipment Download PDFInfo
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- CN204697170U CN204697170U CN201520345993.6U CN201520345993U CN204697170U CN 204697170 U CN204697170 U CN 204697170U CN 201520345993 U CN201520345993 U CN 201520345993U CN 204697170 U CN204697170 U CN 204697170U
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Abstract
The utility model is applicable to safety-security area, provide a kind of autofocus system and video monitoring equipment, comprise the zoom lens for absorbing scene image, and be connected with zoom lens, and scene image calculation system is become the video sensor of video data, the double motor motor for driving camera motion is provided with in zoom lens, also comprise the main control chip be connected with video sensor, and the motor drive ic to be connected with main control chip and double motor motor, described main control chip comprises the zoom tracking module of the focusing range for determining zoom lens, and be connected with described zoom tracking module and motor drive ic respectively, carry out AF value to video data to calculate, and control according to result of calculation the automatic focus module that zoom lens carries out vernier focusing.The utility model, by the focusing range of zoom tracking module determination zoom lens, then carries out vernier focusing by automatic focus module controls zoom lens, improves focusing speed and the precision of zoom lens.
Description
Technical field
The utility model belongs to safety-security area, particularly relates to a kind of video monitoring equipment and autofocus system.
Background technology
Along with raising day by day and the improvement of people's quality of life, national, social property safety and the security of the lives and property of people more and more come into one's own, and bring the flourish of security device thereupon.In some public arenas and the region needing emphatically protection, people wish with less, more accurate equipment monitors wider scope.Bring zoom lens in the fast development of safety-security area thereupon, zoom lens is applied in product competition focus watch-dog becoming video monitoring equipment production firm, uses one of video monitoring equipment prior development direction becoming safety-security area of zoom lens.
But, zoom watch-dog on the market at present, the focusing speed of its zoom lens is slow, focusing accuracy and success rate low, cause monitoring effect undesirable, the needs of user can not be met.
Utility model content
The object of the utility model embodiment is to provide a kind of autofocus system, be intended to solve use that the video monitoring equipment focusing speed of zoom lens is slow at present, focusing accuracy and success rate low, cause the problem that monitoring effect is undesirable.
The utility model embodiment realizes like this, a kind of autofocus system, comprise the zoom lens for absorbing scene image, the double motor motor be provided with for driving camera motion in zoom lens, and be connected with zoom lens, and scene image calculation system is become the video sensor of video data, also comprise the main control chip be connected with video sensor, and the motor drive ic to be connected with main control chip and double motor motor, described main control chip comprises the zoom tracking module of the focusing range for determining zoom lens, and be connected with described zoom tracking module and motor drive ic respectively, in the determined focusing range of zoom tracking module, carry out AF value to video data to calculate, and result of calculation is write described motor drive ic, controlling double motor motor by motor drive ic drives zoom lens to carry out the automatic focus module of vernier focusing.
Preferably, described zoom tracking module comprises the acquiring unit of the camera lens aircraft pursuit course for obtaining zoom lens, and be connected with acquiring unit, control described double motor motor according to camera lens aircraft pursuit course and drive zoom lens motion, for determining the zoom tracking cell of the focusing range of zoom lens.
Preferably, described automatic focus module is included in the first focusing unit enabled daytime, the second focusing unit enabled in the non-highlighted situation of night vision scene, and the 3rd focusing unit enabled in the highlighted situation of night vision scene.
Preferably, also comprise and being connected with described zoom lens and motor drive ic, before zoom lens starts, determine the camera lens initialization module of the reference position of described double motor motor.
Preferably, also comprise and being connected with described video sensor and main control chip, whether stablized by Real-Time Monitoring scene image, and whether the variable quantity of the AF value of main control chip calculating exceedes threshold value, determine whether that needing to control zoom tracking module starts the focusing startup module focused on.
Preferably, be also included in the shots match stage before dispatching from the factory, zoom lens carried out to the curvature correction device of curvature correction, in this device, be provided with the curvature correction chip based on curvature correction algorithm.
The utility model embodiment also provides a kind of video monitoring equipment, and described video monitoring equipment comprises described autofocus system.
The autofocus system that the utility model embodiment provides, by the focusing range of zoom tracking module determination zoom lens, then in this focusing range, carry out AF value by automatic focus module to video data to calculate, and control zoom lens according to result of calculation and carry out vernier focusing, substantially increase focusing speed and the focusing accuracy of zoom lens.The utility model controls motor movement by the motor drive module with motor drive ic, improves the kinematic accuracy of motor; The utility model is by automation curve correction module, before zoom lens dispatches from the factory, automation curve correction is carried out to zoom lens, improve ex factory pass rate and the production efficiency of zoom lens, greatly reduce curvature correction is carried out in utilization manually mortality to zoom lens, and save cost of labor and time cost.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the autofocus system that the utility model embodiment provides;
Fig. 2 is the concrete structure block diagram of the main control chip in the autofocus system that provides of the utility model embodiment;
Fig. 3 is the structured flowchart of the autofocus system that the utility model one preferred embodiment provides;
Fig. 4 is the structured flowchart of the curvature correction device of the autofocus system that another preferred embodiment of the utility model provides.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, the autofocus system that the utility model embodiment provides comprises the zoom lens 10 for absorbing scene image, two arrangement of mirrors sheets and double motor motor is provided with in it, this double motor motor has two motors, each motor correspondence is connected to an arrangement of mirrors sheet, described zoom lens 10 is connected with video sensor 20, and the scene image of picked-up is passed to video sensor 20; Described video sensor 20 receives the scene image that zoom lens 10 transmits, and carries out calculation system to scene image and become video data, and this video sensor 20 is connected with main control chip, and video data is passed to main control chip 30; The video data that described main control chip 30 receiver, video transducer 20 transmits, carries out AF value to this video data and calculates, then result of calculation is write described motor drive ic 40, control double motor motor movement; Described double motor motor is connected with motor drive ic 40 and zoom lens 10 respectively, and control to drive the lens movement in zoom lens 10 by motor drive ic 40, described AF value refers to the automatic focus evaluation function value of autofocus system.
As depicted in figs. 1 and 2, described main control chip 30 comprises and being connected with described video sensor 20 and double motor motor respectively, for the zoom tracking module 31 of the focusing range of the video data determination zoom lens 10 according to video sensor 20, and be connected with zoom tracking module 31 and double motor motor respectively, in conjunction with zoom tracking module 31 determined focusing range, AF value carried out to video data and calculate and result of calculation is write motor drive ic 40, control double motor motor and drive zoom lens 10 to carry out the automatic focus module 32 of vernier focusing.
As shown in Figure 2, described zoom tracking module 31 comprises the acquiring unit 311 of the camera lens aircraft pursuit course for obtaining zoom lens 10, and be connected with acquiring unit 311, control described motor according to camera lens aircraft pursuit course and drive zoom lens motion, for determining the zoom tracking cell 312 of the focusing range of zoom lens 10, wherein: acquiring unit 311 drives two groups of lens movement in zoom lens 10 by two motors controlling double motor motor, obtain the camera lens aircraft pursuit course of zoom lens 10, or the camera lens aircraft pursuit course list provided by camera lens manufacturer obtains camera lens aircraft pursuit course, described zoom tracking cell 312, two motors controlling described double motor motor according to camera lens aircraft pursuit course drive two groups of lens movement in zoom lens 10, the stop motion when detecting that the definition values of the scene image that zoom lens 10 absorbs is in the preliminary focusing threshold range preset, thus determine the focusing range of zoom lens 10.
As shown in Figure 2, described automatic focus module 32 is on the basis of the focusing range of the determined zoom lens 10 of zoom tracking module 31, adopt focusing algorithm to carry out AF value to video data to calculate, then according to result of calculation, control two motor movement in described double motor motor, two motors drive two groups of lens movement in zoom lens 10 thereupon, when detecting that the definition values of the scene image that zoom lens 10 absorbs is in the vernier focusing threshold range preset, then control the stop motion of double motor motor, complete focusing; Described focusing algorithm can for adding the hill-climbing algorithm of little step-length fine tuning based on large step-length coarse scan, or based on the basic hill-climbing algorithm of fixed step size, or the hill-climbing algorithm of optimization based on variable step; By day or under night vision scene, described automatic focus module 32 is enabled the different focusing units based on above-mentioned focusing algorithm and is focused on, described automatic focus module 32 is included in the first focusing unit 321 enabled daytime, the second focusing unit 322 enabled in the non-highlighted situation of night vision scene, and the 3rd focusing unit 323 enabled in the highlighted situation of night vision scene, wherein, described 3rd focusing unit 323 is except adopting focusing algorithm, and the brightness curve also in conjunction with scene image carries out the calculating of AF value to video data.
As shown in Figure 3, in a preferred embodiment, described automatic focusing system also comprises the camera lens initialization module 50 being connected, determining before zoom lens 10 starts the reference position of two motors in described double motor motor with described zoom lens 10 and motor drive ic 40; Described automatic focusing system also comprises and being connected with described video sensor 20 and main control chip 30, whether exceed predetermined threshold value by the variable quantity of the AF value that whether Real-Time Monitoring scene image is stablized and main control chip 30 calculates, determine whether that needing to control zoom tracking module 31 starts the focusing startup module 60 focused on.
As shown in Figure 4, in another preferred embodiment, the shots match stage before described autofocus system is also included in and dispatches from the factory, zoom lens 10 is carried out to the curvature correction device 70 of curvature correction, in this device, be provided with the curvature correction chip 71 based on curvature correction algorithm.
The utility model embodiment also provides a kind of video monitoring equipment, and described video monitoring equipment comprises described autofocus system.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (7)
1. an autofocus system, comprise the zoom lens for absorbing scene image, and to be connected with zoom lens and scene image calculation system to be become the video sensor of video data, the double motor motor for driving camera motion is provided with in zoom lens, it is characterized in that, described autofocus system also comprises the main control chip be connected with video sensor, and the motor drive ic be connected with main control chip and double motor motor respectively; Described main control chip comprises the zoom tracking module of the focusing range for determining zoom lens, and respectively with described zoom tracking module with motor drive ic is connected, video data is carried out to AF value calculates and control according to result of calculation the automatic focus module that zoom lens carries out vernier focusing.
2. autofocus system as claimed in claim 1, it is characterized in that, described zoom tracking module comprises the acquiring unit of the camera lens aircraft pursuit course for obtaining zoom lens, and be connected with acquiring unit, control according to camera lens aircraft pursuit course described double motor motor drive zoom lens motion, to determine the zoom tracking cell of the focusing range of zoom lens.
3. autofocus system as claimed in claim 1, it is characterized in that, the 3rd focusing unit that described automatic focus module is included in the first focusing unit enabled daytime, the second focusing unit enabled in the non-highlighted situation of night vision scene and enables in the highlighted situation of night vision scene.
4. autofocus system as claimed in claim 1, it is characterized in that, described autofocus system also comprises and being connected with described zoom lens and motor drive ic, determines the camera lens initialization module of the reference position of described double motor motor before zoom lens starts.
5. autofocus system as claimed in claim 1, it is characterized in that, described autofocus system also comprises and being connected with described video sensor and main control chip, whether stablized by Real-Time Monitoring scene image, and whether the variable quantity of the AF value of main control chip calculating exceedes threshold value, determine whether that needing to control zoom tracking module starts the focusing startup module focused on.
6. autofocus system as claimed in claim 1, it is characterized in that, in the shots match stage before described autofocus system is also included in and dispatches from the factory, zoom lens is carried out to the curvature correction device of curvature correction, in this device, be provided with the curvature correction chip based on curvature correction algorithm.
7. a video monitoring equipment, is characterized in that, described video monitoring equipment comprises the autofocus system as described in any one of claim 1 ~ 6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520345993.6U CN204697170U (en) | 2015-05-26 | 2015-05-26 | A kind of autofocus system and video monitoring equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520345993.6U CN204697170U (en) | 2015-05-26 | 2015-05-26 | A kind of autofocus system and video monitoring equipment |
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| CN204697170U true CN204697170U (en) | 2015-10-07 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105245781A (en) * | 2015-11-17 | 2016-01-13 | 高新兴科技集团股份有限公司 | Focusing method of simple electric lens |
| CN106412406A (en) * | 2016-11-24 | 2017-02-15 | 冯雪平 | Mobile phone lens |
| CN106559617A (en) * | 2015-11-25 | 2017-04-05 | 北京索斯克科技开发有限公司 | A kind of telephoto lens autofocus |
| CN109302560A (en) * | 2017-07-25 | 2019-02-01 | 宁波天视图像技术有限公司 | A kind of machine vision smart camera focused automatically with zoom |
-
2015
- 2015-05-26 CN CN201520345993.6U patent/CN204697170U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105245781A (en) * | 2015-11-17 | 2016-01-13 | 高新兴科技集团股份有限公司 | Focusing method of simple electric lens |
| CN105245781B (en) * | 2015-11-17 | 2018-09-11 | 高新兴科技集团股份有限公司 | A kind of focus method of simple electric camera lens |
| CN106559617A (en) * | 2015-11-25 | 2017-04-05 | 北京索斯克科技开发有限公司 | A kind of telephoto lens autofocus |
| CN106559617B (en) * | 2015-11-25 | 2022-08-05 | 北京索斯克科技开发有限公司 | Automatic focusing device of telephoto lens |
| CN106412406A (en) * | 2016-11-24 | 2017-02-15 | 冯雪平 | Mobile phone lens |
| CN109302560A (en) * | 2017-07-25 | 2019-02-01 | 宁波天视图像技术有限公司 | A kind of machine vision smart camera focused automatically with zoom |
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