CN104135626A - Device and method for automatically adjusting auxiliary lighting equipment - Google Patents
Device and method for automatically adjusting auxiliary lighting equipment Download PDFInfo
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Abstract
The invention discloses a device and a method for automatically adjusting auxiliary lighting equipment. The information of the auxiliary lighting equipment such as theoretical irradiation orientation, light source brightness and light source divergence angle can be obtained according to the gain value and the lens focusing and focusing location value of an acquisition camera at a night mode, and thus the auxiliary lighting equipment is controlled for carrying out parameter adjustment, so that the device and the method are optimal in image imaging effect in a night environment. The adjustment for the imaging effect can be automatically achieved in real time by utilizing the acquisition for site environment and location information, so that the adjustment effect accords with the site environment according to mature parameter adjustment experience values, and the adjustment method is more flexible and humanized.
Description
Technical field
The present invention relates to intelligent monitoring technology field, relate in particular to a kind of device and method of automatic adjusting servicing lighting.
Background technology
Along with socioeconomic fast development, and the enhancing of people's awareness of safety, the demand of safety defense monitoring system is constantly increased, its application is also constantly expanding, the performance requirement of equipment is also being improved constantly, not only will complete by day high-quality monitor task, and the non-blind area monitoring at night, the high imaging effect under low-light (level) also become the focus of competition gradually.
At present, the method that improves nighttime imaging effect mainly contains two: the one, adjust video camera self parameter, as white balance, day and night state, exposure etc.; The 2nd, increase servicing lighting, as laser, infrared lamp etc.Under low-light (level) environment, single adjusting camera parameters, impact on optimal imaging effect is comparatively limited to, but servicing lighting can increase ambient light illumination, again in conjunction with the adjusting of camera parameters, image effect at night can be improved to a lot of grades, so select the application of increase servicing lighting also more and more extensive.
Utilize servicing lighting, under night environment, can carry out light filling to observed objects or scene, improve the overall brightness in visual field, simultaneously, also should avoid light filling excessively to cause the phenomenon of overexposure to occur, comparatively common method is lens focusing to be fed back to range be divided into several regions, in each region, the light filling position of floor light and focusing position are approximately to linear function, be Y=kX+b (k, the numerical value of b in each region is not necessarily identical), when controlling lens focusing variation, focusing value of feedback is brought in linear function variable X, and calculate and control floor light and arrive light filling position Y.Said method is just approximately linear function by the focusing position of camera lens and floor light light filling position, yet, when using different producers, model camera lens, number of regions and dividing mode that interlock is divided are also not quite similar, make the adjustment effect of the method after transplanting not very good, the setting in interlock region is also more loaded down with trivial details, operates not easyly, and programming thinking is not bery clear.
Given this, the invention provides a kind of device and method of automatic adjusting servicing lighting, to solve the above-mentioned problems in the prior art.
Summary of the invention
The device and method that the object of this invention is to provide a kind of automatic adjusting servicing lighting, to solve the above-mentioned problems in the prior art.
In order to realize object of the present invention, the invention provides a kind of device of automatic adjusting auxiliary equipment, comprising: image-forming module, data processing module, memory module and floor light module;
Wherein, described image-forming module, for observing adjusting and the video image of scene show, comprises camera lens and video camera;
Described data processing module, is connected with described image-forming module, memory module and floor light module, for gathering the information of described image-forming module, reads the data of memory module, controls the action of floor light module;
Described memory module, comprises lens focusing position and angle of visual field relation data, camera gain value and servicing lighting brightness data for storage;
Described floor light module, for regulating field of view angle or the parameter of described floor light module or irradiating orientation, makes to reach the theoretical value of being calculated gained by described data processing module.
Further, in described memory module, store focusing position and angle of visual field relation database table, camera gain value and the servicing lighting brightness data table of camera lens.
Further,, described memory module is FLASH or ferroelectric memory FRAM.
Further, described data processing module adopts digital signal processor or risc microcontroller or complicated programmable logic cells or field programmable logic array or single-chip microcomputer.
Further, described floor light module adopts varifocal laser or varifocal infrared lamp.
Correspondingly, the present invention also provides a kind of method of automatic adjusting servicing lighting, is applied to any one in said apparatus scheme, comprises the following steps:
(1) read the storage data in memory module;
(2) gather focusing, the focal position value of feedback in image-forming module;
(3) according to described focusing, focal position value of feedback, calculate the actual range of current scene object distance camera lens, and then calculate the adjusting angle of servicing lighting direction of illumination, control described servicing lighting rotation and arrive assigned address;
(4) according to described focusing location feedback value, search the visual angle α of the camera lens being stored in described memory module, control described servicing lighting hot spot and reach identical angle of visual field size;
(5) read camera gain value;
(6) according to the described camera gain value reading, search the floor light servicing lighting brightness data that is stored in described memory module, and control servicing lighting brightness adjusting to specifying numerical value.
Further, at the adjusting angle that calculates servicing lighting direction of illumination described in step (3), by calculating as follows:
Adjusting angle=arctan (A/L) or adjusting angle β=arctan (A/2L)
Wherein: L is actual subject distance,
A is that camera lens optical axis is to the vertical range of laser optical axis.
Further, in step (4), according to focusing location feedback value, search and calculate the angle of visual field α of the camera lens that is stored in memory module, control servicing lighting hot spot and reach identical angle of visual field size, specific algorithm is as follows:
αT＝2arctan(tan(αf/2)/T)
Wherein: f is camera lens minimum focus
T is zoom number
The initial field of view angle of α f
α T corresponding field of view angle while being zoom T;
Further, described method also comprises:
(7) according to current focusing position, the step of the beam divergence angle of servicing lighting described in manual adjustments;
(8) according to current camera gain value, the step of the light beam luminosity of servicing lighting described in manual adjustments;
(9) the light beam luminosity Data Update of the camera gain value in the beam divergence angle-data of the described servicing lighting after the focusing position in step (7) and manual adjustments and step (8) and the described servicing lighting after manual adjustments is stored in to the step in described memory module.
Beneficial effect of the present invention is that compared with prior art, apparatus of the present invention and method are built easy, realize easily, regulate thinking simple, workable; According to the performance of camera lens and camera properties adjusting servicing lighting, reliability is higher; In addition, the empirical data in memory module can be upgraded according to actual scene, makes to regulate more to tally with the actual situation, and very good, flexible, hommization, targeted, maintains easily; Utilize and regulate the dispersion angle of servicing lighting and light angle to strengthen nighttime imaging effect, from space, regulate the light filling position of lighting apparatus in the middle of visual field, avoided, because the hot spot that light filling location deflection causes is dispersed and the waste of luminous power, economizing on resources, reduce power consumption; Utilize exterior storage chip to carry out a large amount of empirical data storages as memory module, the time of implementation of having saved main control chip, for algorithm computing provides more room and time.
Accompanying drawing explanation
Fig. 1 is apparatus structure schematic diagram of the present invention;
Fig. 2 is method flow diagram figure of the present invention;
Fig. 3 is field of view angle variation relation schematic diagram of the present invention;
Fig. 4 is the structural representation of the two adjusting angle governor motions of subtend of the present invention;
Embodiment
In order to make object of the present invention, technical scheme and beneficial effect clearer, below in conjunction with embodiment, the present invention is further elaborated.Should be understood to specific embodiment described herein only in order to explain the present invention, be not limited to protection scope of the present invention.
As shown in Figure 1, the invention provides a kind of device of automatic adjusting servicing lighting, comprising:
Image-forming module, data processing module, memory module and floor light module;
Wherein image-forming module, for observing adjusting and the video image of scene show, comprising: camera lens, can adopt Y33Z15RADP; Video camera, adoptable is HDL7312;
Data processing module, is connected with image-forming module, memory module, floor light module, for gathering the information of image-forming module, reads the data of memory module, controls the action of floor light module, comprising: main control chip, can adopt STM32F103VCT6;
Floor light module, be connected with data processing module, for regulating field of view angle or the parameter of floor light module or irradiating orientation, make to reach the theoretical value of being calculated gained by data processing module, comprise: varifocal laser, can adopt CB1000L80, can irradiation distance 3km, 0.2 °～28 ° continuous adjustable angles of visual field;
Memory module, is connected with data processing module, for storing lens focusing position and angle of visual field relation data, camera gain value and servicing lighting brightness data etc., comprising: memory module can adopt EEPROMCAT24C256 chip.
In described memory module, store focusing position and the angle of visual field relation database table of camera lens, when lens focusing arrives certain position, corresponding angle of visual field data; Camera gain value and servicing lighting brightness data table, when camera gain is within the scope of certain, the emitting brightness data of servicing lighting.When data processing module collects lens focusing position, the camera gain value of image-forming module, data processing module is according to the data in memory module, the luminosity of analyzing current focusing position field of view angle and acquisition floor light module illuminating bundle, lighting angle and the brightness of then controlling servicing lighting reach theoretical required value.
As shown in table 1 below, the focusing position of camera lens and angle of visual field relation database table, partial data is as shown in table 1.
Table 1 Y33Z15RADP model lens focusing feedback voltage and angle of visual field relation table
| Feedback voltage (V) | The angle of visual field (°) (1/2 " CCD) | The angle of visual field (°) (1/3 " CCD) |
| 0.578 | 23.42 | 17.57 |
| 0.818 | 16.57 | 12.43 |
| 1.010 | 12.57 | 9.43 |
| 1.202 | 9.42 | 7.07 |
| 1.395 | 6.97 | 5.23 |
| 1.587 | 5.08 | 3.81 |
| 1.779 | 3.64 | 2.73 |
| 1.972 | 2.56 | 1.92 |
| 2.164 | 1.77 | 1.33 |
| 2.300 | 1.34 | 1.01 |
| 2.372 | 1.16 | 0.87 |
| 2.420 | 1.05 | 0.78 |
| 2.468 | 0.94 | 0.71 |
| 2.516 | 0.85 | 0.64 |
| 2.548 | 0.79 | 0.59 |
| 2.580 | 0.74 | 0.56 |
As shown in table 2 below, be camera gain value and servicing lighting brightness data table, partial data is as shown in table 2.In table 2, data are actual measurement data, existing intercepting in the wherein empirical data storage and memory module of part as adjusting.
The switching scope of the present embodiment video camera used is gain 30dB-60dB, in gain 30 dB, transfers color state to, transfers black and white state in the time of 60dB to.
Table 2 camera gain and servicing lighting brightness data table
| Yield value | Servicing lighting brightness (A) |
| 30 | 0.4 |
| 35 | 0.6 |
| 40 | 0.8 |
| 45 | 1.0 |
| 50 | 1.2 |
| 53 | 1.4 |
| 56 | 1.6 |
| 58 | 1.8 |
| 60 | 2 |
As shown in Figure 2, the present invention also provides a kind of method of automatic adjusting servicing lighting, and the method for automatic adjusting servicing lighting of the present invention can realize by the device of the described automatic adjusting servicing lighting in the present invention.Wherein, step (1) realizes by data processing module and memory module; Step (2) and step (5) utilize image-forming module and data processing module to realize; Step (3) realizes by data processing module and floor light module; Step (4) and step (6) realize by data processing module, memory module and floor light module.
Step 201, opens servicing lighting, opens video camera pattern at night; Execution step 202;
Step 202, judges whether to regulate, and if so, performs step 203; If not, return;
Step 203, reads the data of memory module, and relevant parameter is carried out to initialization; Execution step 204;
Step 204, the focusing (ZoomAD) of collection headend equipment, focusing (FocusAD) location feedback value; Execution step 205,
Step 205, according to focusing, focal position value of feedback, calculate the actual range L of current scene object distance camera lens, and then calculate the adjusting angle β of servicing lighting direction of illumination, and regulating and controlling mechanism makes lighting apparatus arrive assigned address to certain direction rotation.Specific algorithm is as follows:
Deflection angle β=arctan (A/L)
Wherein: L is actual subject distance,
Wherein A is that camera lens optical axis is to the vertical range of laser optical axis.
Simultaneously, in order to guarantee the relation of just penetrating of medium and long distance secondary light source and video camera, also can be designed as bidirectional adjustment mechanism, utilize gear drive to carry out subtend to secondary light source and video camera and regulate (as shown in Figure 4), deflection angle β=arctan (A/2L) now simultaneously;
The method of using subtend to adjust, can guarantee the relation (the basic all reflection quilt video cameras of incident light receive) between secondary light source transmitting and the reception of video camera, but because the angle of video camera is adjusted, so the preset position setting has deviation, this misalignment angle is video camera deflection angle, thus adjust finally will be by The Cloud Terrace to video camera homonymy deflection β angle.
Step 206, according to focusing location feedback value, searches and calculates the angle of visual field α of the camera lens that is stored in memory module, controls servicing lighting hot spot and reaches identical angle of visual field size, execution step 207; Specific algorithm is as follows:
αT＝2arctan(tan(αf/2)/T)
Wherein: f is camera lens minimum focus;
T is zoom number;
The initial field of view angle of α f;
α T corresponding field of view angle while being zoom T.
As shown in Figure 3, line segment ab is the minimum f of focusing of initial camera lens, focal length when ac is zoom T, ac=T * ab, i.e. ac/ab=T
And as shown above,
ab×tan(αf/2)＝ac×tan(αT/2)
To sum up, α T=2arctan (tan (α f/2)/T)
Step 207 reads camera gain value Gain under video camera Night; Execution step 208;
Step 208, according to the camera gain value reading, search the servicing lighting brightness data that is stored in memory module, and control servicing lighting brightness adjusting to specifying numerical value, this yield value and brightness relationship do not need to calculate, and only need the brightness value of judgement gain when a certain interval to meet corresponding requirement.
So loop parameter and regulate, with the regulating effect that reaches desirable, flexible, has regional pertinence.
The method of the invention, the method for the automatic adjusting servicing lighting also comprising also comprises the step that the empirical data to storing in memory module is revised, and comprises step:
(a), according to current focusing position, the beam divergence angle of manual adjustments laser, makes light beam in the region of needs, reach best light filling effect;
(b), according to current camera gain value, the light beam luminosity of manual adjustments floor light module, makes light beam in the region of needs, reach best light filling effect;
(c) angle after manual adjustments and monochrome information are upgraded and be stored in the corresponding form of memory module, optimize storage information, make the content of the storage actual use scenes of more fitting.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. automatically regulate a device for auxiliary equipment, it is characterized in that, comprising: image-forming module, data processing module, memory module and floor light module;
Wherein, described image-forming module, for observing adjusting and the video image of scene show, comprises camera lens and video camera;
Described data processing module, is connected with described image-forming module, memory module and floor light module, for gathering the information of described image-forming module, reads the data of memory module, controls the action of floor light module;
Described memory module, comprises lens focusing position and angle of visual field relation data, camera gain value and servicing lighting brightness data for storage;
Described floor light module, for regulating field of view angle or the parameter of described floor light module or irradiating orientation, makes to reach the theoretical value of being calculated gained by described data processing module.
2. the device of automatic adjusting auxiliary equipment according to claim 1, is characterized in that,
In described memory module, store focusing position and angle of visual field relation database table, camera gain value and the servicing lighting brightness data table of camera lens.
3. the device of automatic adjusting auxiliary equipment according to claim 1, is characterized in that, described memory module is FLASH or ferroelectric memory FRAM.
4. the device of automatic adjusting auxiliary equipment according to claim 1, is characterized in that, described data processing module adopts digital signal processor or risc microcontroller or complicated programmable logic cells or field programmable logic array or single-chip microcomputer.
5. the device of automatic adjusting auxiliary equipment according to claim 1, is characterized in that, described floor light module adopts varifocal laser or varifocal infrared lamp.
6. automatically regulate a method for servicing lighting, be applied in claim 1-5, in the device described in any one, it is characterized in that, comprise the following steps:
(1) read the storage data in memory module;
(2) gather focusing, the focal position value of feedback in image-forming module;
(3) according to described focusing, focal position value of feedback, calculate the actual range of current scene object distance camera lens, and then calculate the adjusting angle of servicing lighting direction of illumination, control described servicing lighting rotation and arrive assigned address;
(4) according to described focusing location feedback value, search the angle of visual field α that is stored in the camera lens in described memory module, control described servicing lighting hot spot and reach identical angle of visual field size;
(5) read camera gain value;
(6) according to the described camera gain value reading, search the floor light servicing lighting brightness data that is stored in described memory module, and control servicing lighting brightness adjusting to specifying numerical value.
7. the method for automatic adjusting servicing lighting according to claim 6, is characterized in that, at the adjusting angle that calculates servicing lighting direction of illumination described in step (3), by calculating as follows:
Adjusting angle=arctan (A/L) or adjusting angle β=arctan (A/2L)
Wherein: L is actual subject distance,
A is that camera lens optical axis is to the vertical range of laser optical axis.
8. the method for automatic adjusting servicing lighting according to claim 6, it is characterized in that, in step (4) according to focusing location feedback value, search and calculate the angle of visual field α of the camera lens that is stored in memory module, control servicing lighting hot spot and reach identical angle of visual field size, specific algorithm is as follows:
αT＝2arctan(tan(αf/2)/T)
Wherein: f is camera lens minimum focus
T is zoom number
The initial field of view angle of α f
α T corresponding field of view angle while being zoom T.
9. according to the method for the automatic adjusting servicing lighting described in claim 6-8, it is characterized in that, described method also comprises:
(7) according to current focusing position, the step of the beam divergence angle of servicing lighting described in manual adjustments;
(8) according to current camera gain value, the step of the light beam luminosity of servicing lighting described in manual adjustments;
(9) the light beam luminosity Data Update of the camera gain value in the beam divergence angle-data of the described servicing lighting after the focusing position in step (7) and manual adjustments and step (8) and the described servicing lighting after manual adjustments is stored in to the step in described memory module.
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Address after: 300384 in Tianjin Binhai Huayuan Industrial Zone (outer ring) eight Haitai Huake Road No. 6 Applicant after: TIANJIN YAAN TECHNOLOGY CO., LTD. Address before: 300384 Tianjin City Huayuan Industrial Zone Binhai hi tech Industrial Development Zone Ziyuan Road No. 8 Applicant before: Tianjin Yaan Technology Co., Ltd. |
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Application publication date: 20141105 |
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