CN102685389A - Device and method for automatically adjusting parameters of camera - Google Patents
Device and method for automatically adjusting parameters of camera Download PDFInfo
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Abstract
The invention discloses a device and a method for automatically adjusting parameters of a camera at different time intervals according to position information of a front end holder device, so that the parameter adjustment of the camera is more accordant with actual condition. The method comprises the steps of: arranging a GPS (Global Positioning System) module on the front end holder device to obtain local longitude and latitude and time information and transferring a parameter predetermined value of the camera in the area and at a specific time interval in a storage module to adjust the parameters of the camera. According to the device and the method for automatically adjusting parameters of the camera, the parameter adjustment time is set according to the actual geographic location and seasonal time information of the holder, so that the parameter adjustment of the camera is more accordant with actual condition; the phenomena of image frequent change, color distortion, instability and the like, caused by the situation that most cameras at present use a certain object in a scene as a reference to automatically adjust the parameters and if the scene is changed, a reference substance has to be searched again, are avoided with relatively mature parameter adjustment experience value and with time as the adjustment watershed; and the adjustment is more ideal, flexible, humanized and pertinent.
Description
Technical field
The present invention relates to the intelligent monitoring technology field, relate in particular to a kind of GPS of utilization module and realize the self-regulating device and method of camera parameters.
Background technology
At present; 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 enlarging; Except that traditional main application places such as government department, finance and telecommunications industry, railway station, hotel, all kinds of amusement and recreation place, tourist attractions, square, street, each company and individual dwelling house also become the main application places of safety monitoring system.
Safety defense monitoring system has two key technology points, and one is the control of monitoring product, and another is exactly the demonstration of monitoring image.Therefore, also mainly be divided into two aspects for Research on monitoring system: High Accuracy Control and image processing.Along with popularizing of safety monitoring, user's operation supervise and control product is very skilled, but the camera review of conduct and another interface of user shows adjustment, remains a stranger field.In the design of product, the setting of camera parameters comprises a lot of self-regulating options, and like AWB, day and night conversion, automatic exposure etc. automatically, but these automatic settings all are to be reference with a certain particular scene in the present image.Though a plurality of parameters of video camera have been opened and have been given the user, can regulate freely, owing to be not very to understand of the influence of each parameter, carry out manual adjustments by the user to imaging, often do not reach desirable effect.
On the other hand; Even change image effect through the adjustment camera parameters; But along with angle of visual field variation, scene change, with reference to scenery move, when situation such as ambient light generation frequent variations takes place, video camera can not stop to seek another reference point, and with new benchmark parameter current is adjusted; Make phenomenons such as bluring appears in image, shake, colour cast, instability, image effect still can be very desirable.
Summary of the invention
The technical problem that the present invention will solve provides a kind ofly can regulate camera parameters according to front end platform equipment position information at times automatically, thereby makes camera parameters regulate the device and method that tallies with the actual situation more.
For addressing the above problem, the device of a kind of automatic adjusting camera parameters of the present invention comprises: GPS module, state acquisition module, data processing module, memory module and video camera adjustment module; Wherein
The GPS module is used for confirming front end platform equipment geographic location longitude and latitude and time information;
The state acquisition module links to each other with GPS module, data processing module, be used to receive and extract geographical position that the GPS module confirms and season temporal information;
Data processing module links to each other with memory module, video camera adjustment module;
Memory module is used to store zones of different in difference basic environmental information constantly and the camera parameters value of presetting to this basic environmental information;
The video camera adjustment module is used for camera parameters is regulated and given data processing module with the camera parameters feedback information.
Said memory module internal memory contains zones of different in the time initial value at (like sunrise, the morning, noon, afternoon, sunset, night) of special period under the situation of Various Seasonal, in the preset value of camera parameter under the above-mentioned special period, environmental factor (like illumination, the colour temperature etc.) reference value under special period, the deviant that the time initial value of above-mentioned special period is revised.
Camera parameters described in the present invention comprises white balance, aperture, BLC, one or more in pattern, brightness, colourity, acutance, contrast, shutter speed, gain, frame accumulation, the exposure compensating round the clock.
Described memory module is FLASH or ferroelectric memory FRAM; Said data processing module adopts digital signal processor or risc microcontroller or complicated programmable logic cells or FPGA or single-chip microcomputer.
The present invention also provides a kind of method of automatic adjusting camera parameter, may further comprise the steps:
(1) reads GPS module longitude and latitude, current time data;
(2), call the camera parameter preset value of this zone, this special period video camera is regulated according to current longitude and latitude, temporal information;
(3) be written into the zero-time of next special period, and pick up counting;
When (4) treating the zero-time arrival of next special period, call the camera parameter preset value of said next special period video camera is regulated, and the operation of repeating step (3).
The method of automatic adjusting camera parameter of the present invention can realize through the device of the described automatic adjusting camera parameters among the present invention.Step (1) utilizes GPS module, state acquisition module to realize respectively; Step (2) and step (4) realize through data processing module, memory module and video camera adjustment module respectively; Step (3) realizes through data processing module.
Camera parameters described in the present invention comprises white balance, aperture, BLC, one or more in pattern, brightness, colourity, acutance, contrast, shutter speed, gain, frame accumulation, the exposure compensating round the clock.
Said memory module internal memory contain zones of different (like the torrid zone, subtropical zone, temperate zone etc.) the time initial value at (like sunrise, sunset, the morning, noon, afternoon, night) of special period under the situation of Various Seasonal, under above-mentioned special period the preset value of camera parameter.After the state acquisition module is obtained longitude and latitude, current time (year, the moon, day, time, the branch) numerical value of GPS module; Above-mentioned numerical information is passed to data processing module; Data processing module is analyzed residing zone of current longitude and latitude and residing special period of current time; And then in memory module, call the camera parameter preset value of this zone, this special period, through the video camera adjustment module video camera is carried out parameter regulation.
The method of automatic adjusting camera parameter of the present invention also comprises the step that the time initial value of special period is revised, and this step is positioned between step (2) and the step (3), comprises step:
(a) the front end platform equipment latitude, the current time numerical value that obtain according to the GPS module calculate this longitude and latitude place, the every day time initial value of special period accurately;
(b) with this longitude and latitude place that calculates in the step (a), every day accurately the initial value of special period deposit memory module in order to calling;
(c), call the camera parameter preset value of this special period camera parameters is revised according to current time information.
Beneficial effect of the present invention is:
1, system building is easy, realizes easily; The adjusting thinking is simple, and is workable;
2, according to residing actual geographical position and season temporal information, setup parameter is regulated the time, camera parameters is regulated tallied with the actual situation more; Utilize the parameter regulation empirical value of comparative maturity; With time is to regulate the watershed; Can avoid present most video camera is to be reference with a certain target in the scene because of automatically regulating parameter; If scene need be sought object of reference after changing again, and phenomenons such as the image frequent variations that causes, color distortion, instability; Regulate even more ideal, flexible, hommization, targeted.
3, utilize the exterior storage chip to carry out a large amount of empirical data storages as memory module, make main control chip only in needs, carry out data with storage chip and transmit, the time of implementation of having practiced thrift main control chip is for the algorithm computing provides more space and time.
4, camera parameters is when using Automatic adjustment method of the present invention to regulate; Can also cooperate manual adjustments; When running into actual weather conditions and presetting the adjusting situation that parameter value is not complementary or preset regulating effect is not good, can artificially adjust the camera parameter.Adopt the method that matches with manual adjustments of regulating automatically, can adjust flexibly the shooting effect of video camera, make image keep steady and audible state according to the situation of actual environment.
Description of drawings
Fig. 1 is the system architecture diagram that the present invention regulates the camera parameters device automatically.
Fig. 2 is the journey block diagram that the present invention regulates the camera parameters method automatically.
Embodiment
In order to make those skilled in the art person understand technical scheme of the present invention better, the present invention is done further detailed description below in conjunction with accompanying drawing and execution mode.
Like Fig. 1, shown in 2, the device of a kind of automatic adjusting camera parameters of the present invention comprises: GPS module, state acquisition module, data processing module, memory module and video camera adjustment module;
GPS module wherein is used for confirming the longitude and latitude and the time information of front end platform equipment geographic location.
The state acquisition module links to each other with GPS module, data processing module, be used to receive and extract geographical position that the GPS module confirms and season temporal information.
Data processing module links to each other with memory module, video camera adjustment module.
The video camera adjustment module is used for camera parameters is regulated and given data processing module with the camera parameters feedback information.
Memory module is used to store zones of different in difference basic environmental information constantly and the camera parameters value of presetting to this basic environmental information, comprising:
(1) the time initial value of zones of different special period under the situation of Various Seasonal; Example is as shown in table 1, video camera adjusting pattern is divided into 11 kinds of patterns such as tropical rain forest, tropical desert, subtropical zone monsoon summer, subtropical zone monsoon winter, Mediterranean summer, Mediterranean winter, ocean, temperate zone, continent, temperate zone summer, continent, temperate zone winter, polar ice sheet summer, polar ice sheet winter according to factors such as different longitudes and latitudes, climatic characteristics.
Tropical rain forest: the both sides, equator, to the south, north is extended about 5～10 °, annual high temperature and rainy, long summer;
The tropical desert: between south, 15 °～30 ° of the north latitude, annual high temperature drying;
The subtropical zone monsoon: 25 °～35 ° of north latitude, summer high temperature is rainy, and winter, gentleness was short of rain, made a clear distinction between the four seasons;
Mediterranean: between 30 °～40 ° in the latitude, summer is hot dry, and winter, gentleness was rainy;
The ocean, temperate zone: south, 40 °～60 ° areas of north latitude, annual gentle rainy;
The continent, temperate zone: between 35 °～55 ° of the north latitude, winter is cold, and summer is warm, and precipitation is rare;
Polar ice sheet: be distributed in polar region and in the neighbourhood, be in the long night state winter, though be daytime forever summer, the sunlight oblique fire, the gained heat is faint, annual severe cold.
According to season, solar azimuth, factor such as length round the clock, the period in one day is divided into a plurality of continuous special period such as sunrise, the morning, noon, afternoon, sunset, night.
And the zero-time of above-mentioned different regions, Various Seasonal, special period is stored in the table 1 in order to calling.
The time initial value of table 1 zones of different special period under the situation of Various Seasonal
| Sunrise | The morning | Noon | Afternoon | Sunset | Night | |
| Tropical rain forest (high temperature and rainy) | 4:30 | 5:30 | 8:30 | 17:00 | 20:00 | 21:00 |
| Tropical desert (high temperature and little rainfall) | 4:30 | 5:30 | 8:30 | 17:00 | 20:00 | 21:00 |
| Subtropical zone monsoon summer (high temperature and rainy) | 5:30 | 6:30 | 9:30 | 16:00 | 19:00 | 20:00 |
| Subtropical zone monsoon winter (gentle short of rain) | 6:30 | 8:00 | 10:30 | 14:00 | 18:00 | 19:00 |
| Mediterranean summer (high temperature and little rainfall) | 5:30 | 6:30 | 9:30 | 16:00 | 19:00 | 20:00 |
| Mediterranean winter (gentle rainy) | 6:30 | 8:00 | 10:30 | 14:00 | 18:00 | 19:00 |
| Ocean, temperate zone (gentle rainy) | 6:30 | 8:00 | 10:30 | 16:00 | 19:00 | 20:00 |
| Continent, temperate zone summer (gentle short of rain) | 6:00 | 7:30 | 10:00 | 16:00 | 19:00 | 20:00 |
| Continent, temperate zone winter (low temperature is short of rain) | 7:00 | 9:00 | 11:00 | 15:00 | 16:30 | 17:30 |
| Polar ice sheet summer (low temperature is daytime forever) | Do not have | 1:00 | Do not have | 13:00 | Do not have | Do not have |
| Polar ice sheet winter (low temperature long night) | Do not have | Do not have | Do not have | Do not have | Do not have | 00:00 |
Certainly, to the division of different regions, special period, only be a kind of mode in the present embodiment in the table 1, can also divide according to other regionalisms, period characteristic according to concrete needs;
(2) preset value of camera parameter under above-mentioned special period is as shown in table 2, and the camera parameter is divided into white balance, aperture, BLC, pattern round the clock.
Certainly; Camera parameters in the table 2; Only being a kind of parameter combinations in the present embodiment, can also be white balance, aperture, BLC, the compound mode of one or more in pattern, brightness, colourity, acutance, contrast, shutter speed, gain, frame accumulation, the exposure compensating round the clock.
The preset value of camera parameter under table 2 special period
In the present embodiment, for the adjusting of the gain of white balance parameter, between adjacent two crucial moments, variation red, blue gain is 10 grades, and the variation of aperture is 1 grade.
(3) the environmental factor reference value under special period is as shown in table 3, and environmental factor comprises illumination, colour temperature etc.;
The environmental factor reference value of table 3 under special period
| Sunrise | The morning | Noon | Afternoon | Sunset | Night | |
| Illumination (Lux) | 300 | 3000 | 30000～300000 | 3000 | 300 | 0.003～0.03 |
| Colour temperature (Kelvin) | 3000 | 3500 | 5500 | 3500 | 3000 | Different and different according to light |
(4) deviant of the time initial value of special period being revised; As shown in table 4; Because in different areas; Though the sun has run to a certain certain location (being the initial value that arrives a certain special period the time); But illumination, colour temperature that should this moment of zone meet or exceed the reference value in the table 3, and this just need utilize the particular moment deviant (Offset) shown in the table 4 that the time initial value of special period is revised, so that the adjusting of camera parameters more meets the needs of local environment condition.
Described memory module is FLASH or ferroelectric memory FRAM; Said data processing module adopts digital signal processor or risc microcontroller or complicated programmable logic cells or FPGA or single-chip microcomputer.
The deviant that the time initial value of table 4 pair special period is revised (unit for hour)
| Sunrise | The morning | Noon | Afternoon | Sunset | Night | |
| Tropical rain forest (high temperature and rainy) | 0 | -0.5 | +3.0 | -4.0 | 0 | 0 |
| Tropical desert (high temperature and little rainfall) | -0.5 | -0.5 | -2.5 | +2.5 | +0.5 | 0 |
| Subtropical zone monsoon summer (high temperature and rainy) | 0 | -0.5 | +2.0 | -2.0 | 0 | 0 |
| Subtropical zone monsoon winter (gentle short of rain) | 0 | -1.5 | 0 | +0.5 | 0 | 0 |
| Mediterranean summer (high temperature and little rainfall) | -0.5 | -0.5 | -2.5 | +0.5 | +0.5 | 0 |
| Mediterranean winter (gentle rainy) | 0 | +0.5 | +1.5 | -1.5 | -0.5 | 0 |
| Ocean, temperate zone (gentle rainy) | 0 | -0.5 | +0.5 | -2.5 | -1.0 | 0 |
| Continent, temperate zone summer (gentle short of rain) | 0 | 0 | 0 | 0 | 0 | 0 |
| Continent, temperate zone winter (low temperature is short of rain) | 0 | +1.0 | +1.0 | -2.0 | -0.5 | 30 |
| Polar ice sheet summer (low temperature is daytime forever) | Do not have | 0 | Do not have | 0 | Do not have | Do not have |
| Polar ice sheet winter (low temperature long night) | Do not have | Do not have | Do not have | Do not have | Do not have | 0 |
Certainly; Listed each item numerical value or number range in above-mentioned table 1 to the table 4; Only as a kind of embodiment that provides among the present invention; Play the effect that device and method disclosed by the invention is illustrated, do not represent the present invention only to carry out the qualification of protection range with the content of putting down in writing in the above table.
The present invention also provides a kind of device through above-mentioned automatic adjusting camera parameter to the method that the camera parameter automatically adjusts, and may further comprise the steps:
(1) The Cloud Terrace powers on;
(2) the GPS module is obtained local longitude (J), latitude (W), year (Y), month (M), day (D), hour (H), minute (Min) information;
(3) the state acquisition module reads above-mentioned information and passes to data processing module;
(4) data processing module utilizes the information that the GPS module is obtained, and comprises J, W, Y, M value etc., judges this their location, place, season of living in; The D that utilization is read, H information can be judged sun approximate location, to confirm the residing special period under the current time; According to these information, search in the memory module camera parameters regulated value of current time under this video camera adjusting pattern, the camera parameters that initialization is current;
(5) information obtained according to the GPS module of data processing module comprises J, W, H, Min value etc., calculates the orientation of the sun, and specific algorithm is following:
Solar declination (equating with the subsolar point latitude) is represented with δ, can be obtained by formula (3); Observation ground geographic latitude promptly is the latitude value W that read by state acquisition module 12 (solar declination and geographic latitude all are north latitude for just, and south latitude is for bearing); Local time (hour angle) represent with t, during 12 of regulation local times local time be 0 degree, the every angle value at a distance from increase in a hour in front and back is:
360 degree/24 hours=15 degree
The computing formula of sun altitude is:
sin h＝sin W sin δ+cos W cos δ cos t ...... (1)
Computing formula is in the local time of then:
t＝arccos〔(sin h-sin W sin δ)/(cos W cos δ)〕......(2)
The algorithm of solar declination δ is following:
δ＝0.372+23.2567sinθ+0.1149sin2θ-0.1712sin3θ-0.758cosθ+0.3656cos2θ+0.0201cos3θ ...... (3)
θ claims a day angle in the formula, promptly
θ＝2π(N-N
0)/365.2422 ...... (4)
N is a day of year in the formula, promptly is exactly date serial number within the year, and for example, January 1, its day of year was 1, and the day of year in December 31 non-leap year is 365, the leap year then the day of year on December 31 be 366.
N
0＝79.6764+0.2422×(Y-1985)-INT〔(Y-1985)/4〕
... (5) (INT representes the round numbers part in the formula)
Known:
Day rises sunset: sun altitude is 0 degree;
High noon is constantly: sun altitude is maximum, local time be 0 degree;
The moment at night: sun altitude is less than 0 degree;
Other are constantly: sun altitude h along with local time and the variation of the declination of the sun and changing.
Therefore, can obtain this place every day of the time initial value of special period accurately, for example sunrise constantly, sunset constantly, the morning constantly, high noon constantly, afternoon constantly, night constantly.
With obtain these constantly value parameters be stored in the memory module, call when this place camera parameters is regulated.
According to current time information, call the camera parameter preset value of this special period camera parameters is revised.
(6) be written into the zero-time of next special period, and pick up counting;
When (7) treating the zero-time arrival of next special period, call the camera parameter preset value of said next special period video camera is regulated, and the operation of repeating step (6).
So parameter regulation is carried out in circulation, with the regulating effect that reaches desirable, flexible, regional pertinence is arranged.
Claims (3)
1. a device of regulating camera parameters automatically is characterized in that, comprising: GPS module, state acquisition module, data processing module, memory module and video camera adjustment module; Wherein
The GPS module is used for confirming front end platform equipment geographic location longitude and latitude and time information;
The state acquisition module links to each other with GPS module, data processing module, be used to receive and extract geographical position that the GPS module confirms and season temporal information;
Data processing module links to each other with memory module, video camera adjustment module;
Memory module is used to store zones of different in difference basic environmental information constantly and the camera parameters value of presetting to this basic environmental information;
The video camera adjustment module is used for camera parameters is regulated and given data processing module with the camera parameters feedback information.
2. method of automatically regulating the camera parameter may further comprise the steps:
(1) reads GPS module longitude and latitude, current time data;
(2), call the camera parameter preset value of this zone, this special period video camera is regulated according to current longitude and latitude, temporal information;
(3) be written into the zero-time of next special period, and pick up counting;
When (4) treating the zero-time arrival of next special period, call the camera parameter preset value of said next special period video camera is regulated, and the operation of repeating step (3).
3. the method for automatic adjusting camera parameter as claimed in claim 2 is characterized in that: also comprise the step that the time initial value of special period is revised, this step is positioned between step (2) and the step (3), comprises step:
(a) the front end platform equipment longitude and latitude, the current time numerical value that obtain according to the GPS module calculate this longitude and latitude place, the every day time initial value of special period accurately;
(b) with this longitude and latitude place that calculates in the step (a), every day accurately the initial value of special period deposit memory module in order to calling;
(c), call the camera parameter preset value of this special period camera parameters is revised according to current time information.
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