CN1725804A - Intelligent camera with traffic monitoring special function and intelligent shooting method thereof - Google Patents
Intelligent camera with traffic monitoring special function and intelligent shooting method thereof Download PDFInfo
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Abstract
An intelligent camera for monitoring traffic consists of lens, interface, button and imaging control circuit including image circuit, image processing control circuit , light complement unit , storage unit and communication control unit . Its shooting method includes storing trapped image converted into required digital image by A / D converter in buffer storage , searching out interested region , then calculating - analyzing and processing as well as imaging and light complement controlling the region for obtaining satisfied image output .
Description
Affiliated field
The invention belongs to intelligent transportation monitoring and area of pattern recognition, relate in particular to intelligent camera and intelligent camera method thereof with traffic monitoring special function.
Background technology
For transport solution blocks up and traffic safety problem, along the line or each main highway section, city is provided with the traffic test point and monitors in real time at highway in vehicle supervision department, and these monitoring are to be undertaken by artificial mode mostly.Along with popularizing and the release day by day of new and high technology of science and technology, intelligentized video monitoring information is as the abundantest a kind of in all information sources, caused that industry payes attention to widely, and set up a large amount of intelligent traffic monitoring systems in various places successively, but how to have realized that wherein intellectuality collection, processing and the issue of traffic information system remain a key issue of needing solution badly.For example, the video camera of traffic monitoring employing at present has only simple imaging function, and Imaging for Control is to carry out according to the method for video camera factory settings, the user can only select in several modes, and can't control flexibly according to the real-time ground that requires of oneself, especially for car plate identification, the extraction of traffic parameter and the detection of traffic events, need finish by the digital signal processing unit of roadside rack, this structure cabling complexity, equipment are various, and it is high and a difficult problem such as should not safeguard to have failure rate.From point of practical use, someone designs a kind of bank that is primarily aimed at, the integrated form integrated camera that the indoor environments such as office and hospital of maintaining secrecy are used, this integrated form integrated camera can only use in indoor environment, and do not consider to change as the complicated light under the outdoor site environment of traffic, actual conditions such as the abominable and multiple communication mode coexistence of operative scenario, especially intelligent monitor system need be discerned vehicle license and traffic parameter automatically from video image, can't use under the situation that traffic events etc. are had relatively high expectations to picture quality, therefore can't in traffic monitoring, effectively be used.
And in order to make full use of video information resources, from video image, extract valuable transport information by algorithm for pattern recognition, judge that as vehicle license, vehicle, the speed of a motor vehicle, vehicle flowrate, vehicle peccancy information and traffic events etc. are the functions that the user generally is concerned about and is badly in need of.
Released a series of Video processing product at present both at home and abroad, as license plate identification device, video traffic current sensor etc., but in actual applications ubiquity function singleness, hardware platform complexity, can not be agile and all-purpose and a lot of problems such as practical application effect difference.
Have again, present traffic events supervisory control system has two kinds of image transmission and storage mode, the one, all monitoring images all are sent to Surveillance center's storage, in fact because the transmission of every road image and storage will consume a large amount of Internet resources and storage resources, cause the expensive and actual waste of cost; Another kind is the mode that adopts the image switching transmission, shows and store, but can cause a lot of images so again might be to ignore to cause valuable image not obtain the phenomenon of storing by the people, and very important video image (for example accident generating process video recording) is lost and can be caused irreparable damage during network failure.
Summary of the invention
The present invention is intelligent camera and the intelligent camera method thereof that a kind of intelligent camera with traffic monitoring special function of designing in order to overcome the above problems has the traffic monitoring special function, and this intelligent camera can be an one with function collection such as shooting, image recognition and information storage.
The technical measures that the present invention takes are: a kind of intelligent camera with traffic monitoring special function comprises casing, is located at pick-up lens, each functional interface and each function button of being located at machine shell panel of suitable position in the casing and is located in the casing the image forming control circuit that becomes with each functional interface and the electrical connection of each function button; Described one-tenth image forming control circuit comprises imaging circuit, image processing control circuit, light compensating apparatus, memory cell and communication control unit; Described imaging circuit comprises transducer and drive circuit, and described transducer is used to receive the image that pick-up lens takes in and produces analog signal and outputs to image processing control circuit; Be characterized in,
Described image processing control circuit comprises one analog-to-digital conversion/image pre-process circuit, one imaging/light filling control circuit, a buffer storage and a digital signal processing unit, wherein:
Described analog-to-digital conversion/the input of image pre-process circuit is connected with the output of transducer, and this analog-to-digital conversion/output of image pre-process circuit is connected with the input of buffer storage;
Described imaging/the input of light filling control circuit is connected with the output of drive circuit, and its output is connected with transducer with light compensating apparatus respectively;
Described buffer storage is connected with memory cell is two-way, and the input of this buffer storage is connected with the output of control unit with the analog-to-digital conversion/output of image pre-process circuit respectively;
Described digital signal processing unit is respectively with imaging/light filling control circuit and buffer storage is two-way is connected, and the output of this digital signal processing unit also is connected with the input of communication control unit.
Above-mentioned intelligent camera with traffic monitoring special function, wherein, described imaging/light filling control circuit mainly is made of a single-chip microcomputer.
Above-mentioned intelligent camera with traffic monitoring special function, wherein, described light compensating apparatus is constituted by photoflash lamp or LED or the two.
Above-mentioned intelligent camera with traffic monitoring special function, wherein, set functional interface comprises or comprises the interface of the standard radio communication interface that has by expansion equipment, the interface of supporting the communications protocol of international standard, support display device and General-Purpose Output and the interface of supporting keyboard, mouse standard input device interface and related protocol on the described video camera machine shell panel.
Above-mentioned intelligent camera with traffic monitoring special function, wherein, set function button comprises power knob, shutter release button and manually captures image button on the described video camera machine shell panel.
Use the intelligent camera method that intelligent camera carries out traffic monitoring, be characterized in may further comprise the steps;
A will comprise that by pick-up lens the car profile of mobile motor vehicle and the traffic scene image of license plate catch, and be transported to image processing control circuit by transducer;
After the video signal of b, simulation is input to image processing control circuit, through analog-to-digital conversion, and carries out becoming satisfactory digital picture after the image preliminary treatment and store in the buffer storage;
C, digital signal digital signal processing unit obtain every width of cloth data image signal from the buffering memory, and every width of cloth digital picture is sought automatically the position of region-of-interest, in the region-of-interest of determining, analyze the processing requirements whether characteristics of image in this zone satisfies image recognition, if satisfy, directly change the identification of carrying out the next frame video image over to and handle; Otherwise, generate imaging and light filling control command and send to imaging/light filling control circuit, carry out the control of imaging and light filling effect;
D, digital signal processing unit obtain the characteristics of image and the information of region-of-interest from sequence of video images, requiring that according to predefined picture quality satisfactory digital video image is carried out compressed encoding simultaneously handles, generate the video streaming image or the single image of certain compression ratio, and with these features and information by send in real time by communication control unit or by buffer memory stores in memory cell.
Above-mentioned application intelligent camera carries out the intelligent camera method of traffic monitoring, and wherein, the step of the control of the described imaging effect of c step is:
At first judge that by imaging/light filling control circuit whether the parameter of control imaging circuit has been adjusted to maximum, if do not have, then changes the judgement to the imaging parameters of next frame video image over to; Otherwise then start light compensating apparatus, regulate the illumination luminance parameter, simultaneously according to light filling intensity adjustments imaging parameters, to reach best imaging effect.
Above-mentioned application intelligent camera carries out the intelligent camera method of traffic monitoring, wherein, the characteristics of image of the described region-of-interest of c step is meant color characteristic, gray feature or textural characteristics, and vehicle license, vehicle, the speed of a motor vehicle, vehicle flowrate, vehicle peccancy judgement information and traffic event information.
Above-mentioned application intelligent camera carries out the intelligent camera method of traffic monitoring, wherein, the d step is described to be meant to the requirement in the memory cell by buffer memory stores: after preserving predefined a period of time length for the video image real time record to buffer storage, buffer storage is according to the automatic flush buffers of the step-length district that sets, if alert event has taken place, then the video image before the incident of buffering area stored is deposited in the memory cell, and continue the process of record whole event, till incident finishes, otherwise, do not store.
Above-mentioned application intelligent camera carries out the intelligent camera method of traffic monitoring, wherein, imaging/light filling control circuit judges that the parameter of control imaging circuit is meant: digital signal processing unit is sought the image region-of-interest of dynamic change adaptively, generate respective imaging and light filling control command by adaptive algorithm, be controlled to the picture time for exposure length of circuit sensor and the light filling effect of light compensating apparatus by light filling/control unit, make video image remain on to be suitable for most the requirement of license plate identification and Video Detection always for picture quality.
Because the present invention has adopted above technical scheme, to make a video recording, function such as image recognition and information storage collection is an one, make this intelligent camera off line independently finish the required recognizer function of traffic monitoring, can require refurbishing procedure according to difference, can be unified in license plate identification or the Video Detection function of finishing all intelligent monitor systems on the Camera Platform, and can easily the program of intelligent camera be made amendment and upgrade, the development sequence interface platform that possesses standard, light compensating apparatus is constituted by photoflash lamp or LED or the two, and its light filling effect can be by system as required by the standard serial port Communication Control; Can adapt to traffic scene environment complicated and changeable, seek the image region-of-interest of dynamic change adaptively by digital signal processing unit, generate respective imaging and light filling control command by adaptive algorithm, by intelligent light filling and the time for exposure length that is controlled to picture unit controls corresponding C CD/CMOS chip and the light filling effect of light compensating apparatus, so just constitute a closed-loop control, make video image remain on to be suitable for most the requirement of license plate identification and Video Detection always for picture quality for picture quality.
Description of drawings
Concrete structure of the present invention, performance, feature are further described by following embodiment and accompanying drawing thereof.
Fig. 1 is the contour structures schematic diagram of the intelligent camera of the present invention with traffic monitoring special function.
Fig. 2 is the circuit theory diagrams that the present invention has the intelligent camera of traffic monitoring special function.
Fig. 3 is the intelligent camera machine shell panel interface schematic diagram that the present invention has the traffic monitoring special function.
Fig. 4 adopts the present invention to have the connection diagram of the intelligent camera formation plate recognition system of traffic monitoring special function.
Fig. 5 is imaging of the present invention and light filling control module circuit diagram.
Fig. 6 is imaging of the present invention and light filling control principle flow chart.
Fig. 7 is image storage of the present invention, output principle flow chart.
Embodiment
See also Fig. 1, this is the contour structures schematic diagram with intelligent camera of traffic monitoring special function of the present invention.The present invention is a kind of intelligent camera 100 with traffic monitoring special function, each functional interface 3 that comprise pick-up lens 1, casing 2, is located at machine shell panel 21 and each function button 4 (please cooperate) referring to Fig. 3 and be arranged in the casing with each functional interface and the electrical connection of each function button become image forming control circuit 5 (please cooperate) referring to Fig. 2.
See also Fig. 2.One-tenth image forming control circuit 5 of the present invention comprises imaging circuit 51, image processing control circuit 52, light compensating apparatus 53, memory cell 54 and communication control unit 55; Imaging circuit 51 comprises transducer 511 and drive circuit 512, and transducer 511 is made of the CCD/CMOS chip, and it is connected with pick-up lens 1; Light compensating apparatus is constituted by photoflash lamp or LED or the two.
Described image processing control circuit 52 comprises one analog-to-digital conversion/image pre-process circuit 521, one imaging/light filling control circuit 522, a buffer storage 523 and a digital signal processing unit 524, wherein: the analog-to-digital conversion/input of image pre-process circuit is connected with the output of transducer, and this analog-to-digital conversion/output of image pre-process circuit is connected with the input of buffer storage; Imaging/the input of light filling control circuit is connected with the output of drive circuit, and its output is connected with transducer with light compensating apparatus respectively; Buffer storage is connected with memory cell is two-way, and the input of this buffer storage is connected with the output of control unit with the analog-to-digital conversion/output of image pre-process circuit respectively; Digital signal processing unit is respectively with imaging/light filling control circuit and buffer storage is two-way is connected, and the output of this digital signal processing unit also is connected with the input of communication control unit.
See also Fig. 3.Set functional interface comprises or comprises the interface of standard radio communication interface, the interface of supporting the communications protocol of international standard that has by expansion equipment, the interface of supporting display device and General-Purpose Output and support keyboard, mouse standard input device interface and related protocol on the video camera machine shell panel of the present invention.Set function button comprises power knob, shutter release button and manually captures image button on the video camera machine shell panel.
Intelligent camera in traffic scene work is connected in the server of administrative center by wired or wireless communication mode, according to the diversity of traffic with network, LAN is set, RS-232/485, USB, IEEE1394, the standard radio communication interface, manually capture image button (the same ordinary digital camera of principle), support the communications protocol of international standard, TCP/IP, PPP, FTP, HTTP, support display device, the General-Purpose Output interface, support keyboard, mouse standard input device interface and related protocol, every video camera can be provided with the IP address, be convenient to carry out the on-line file management for the multiple cameras that is distributed under the traffic scene environment, provide program to download, parameter is provided with, fault and operating state inquiry and management detect data and image function, and various transport information can be sent to outside traffic user use.
In order rationally to use the network bandwidth, system adjusts the video flow rate of picture quality and Network Transmission according to user's request, the parameter that digital signal processing unit is provided with according to the user, when buffering reads every two field picture the memory and carries out analyzing and processing, the carries out image Coding Compression Algorithm, the form of image after the compression with standard stored into this machine memory cell or carry out Network Transmission by communication unit, so just can adapt to respectively and transfer the requirement of manually checking high quality graphic when under the normal traffic environmental condition, being indifferent to details to for low low-quality requirement of flow rate of traffic monitoring image and generation traffic events.
Vehicle blacklist, road traffic regulation relevant information that while video camera of the present invention is managed usefulness with break in traffic rules and regulations download in this machine memory cell such as the hard disk, its data by network and management server synchronously or the mode of down loading updating, the work of remaining valid under can situation during slow or network failure when access to netwoks speed in off line.
See also Fig. 4, this is to use the present invention to have the system diagram of the license plate identification that intelligent camera constituted of traffic monitoring special function.Comprise a plurality of intelligent cameras 100, detection monitor terminal 200, the management server 300 that are located at the Road Detection mouth, these a plurality of intelligent cameras 100, detection monitor terminal 200, management server 300 are by network 400 links.
The method of intelligent camera of the present invention is: image scene is by the pick-up lens and the transducer of intelligent camera, through analog-to-digital conversion and image pre-process circuit, be converted to satisfactory digital picture, store in the buffer storage, digital signal processing unit obtains every width of cloth digital picture from the buffering memory, handle through searching and computational analysis on the one hand for area-of-interest, generate imaging and light filling control strategy, by sending instruction to imaging/light filling control circuit, finish the video camera imaging parameter (as shutter, gain, the light-filling strategy of definite and light compensating apparatus model selection etc.) is (as brightness, time etc.), till the image of the condition of being met; On the other hand, digital signal processing unit runs image processing and algorithm for pattern recognition, from sequence of video images, obtain significant information such as vehicle license, vehicle, the speed of a motor vehicle, vehicle flowrate, vehicle peccancy judgement information and traffic events, can generate simultaneously the video streaming image or the single image of certain compression ratio, send in real time or store in the memory cell by communication control unit.
See also Fig. 5, imaging/light filling control circuit that the present invention has in the intelligent camera of traffic monitoring special function mainly is made of a single-chip microcomputer CI.This single-chip microcomputer can be finished the control of whole module and to the control of imaging sensor (to call the CCD/CMOS transducer in the following text) imaging effect, and finishes the control to the light compensating apparatus operating state.U1, U2, U3, U4 isolate optocoupler among the figure, are used for carrying out Signal Spacing, and with protection single-chip microcomputer internal circuit, all communications and control polishing signal are all by transferring the output of electric current loop signal to after the light-coupled isolation.
CCD control circuit operation principle and flow process are, clock signal (the Xin of the control CCD imaging effect of main control singlechip intercepting CCD control circuit, X1, X2, X3 and CLK), obtain the signal command of the control electronic shutter of sending from digital signal processing unit by the RXD pin, main control singlechip is control command thus, algorithm according to the imaging control of setting, generate the clock signal clk of a control CCD/CMOS sensor senses device imaging effect, by (Xout, X1, X2, X3 and CLK) 5 pin export to the CCD/CMOS transducer, reach by the effect of digital signal processing unit by the serial port command control picture pick-up device electronic shutter time for exposure, control flow is finished after by the TXD pin with control signal and state of a control the digital signal processing unit that feeds back to, with the affirmation state of a control with serial data.
For example, digital signal processing unit is issued an image deepening of main control singlechip order by adaptive algorithm, and main control singlechip is just exported the Xout signal lag after a time period like this, makes the ccd image time for exposure shorten, the imaging effect deepening.Digital signal processing unit is by adaptive algorithm, issues the order that brightens of image of main control singlechip, and main control singlechip is just carried the Xout signal previous time period output like this, makes that the ccd image time for exposure is elongated, and imaging effect brightens.
Receive simultaneously the order of the control polishing effect that control unit sends by main control singlechip, concern the light filling effect of controlling supplementary lighting module time phase constantly by unlatching of control electronic shutter and polishing, by the operating state of the outside light compensating apparatus of single-chip microcomputer pin Flash1, Flash2 control.So just constitute a closed-loop control for the close-up image quality, make no matter close-up image can both remain on location and the identification that is suitable for licence plate most with night by day always, thereby make system be issued to very high license plate identification rate in various light condition.
See also Fig. 6, this is imaging and light filling control principle flow chart in imaging/light filling control circuit.After the video image of simulation is input to digital signal processing unit, through analog-to-digital conversion equipment, carry out becoming satisfactory digital picture after the image preliminary treatment, according to the characteristics of image of wanting region-of-interest, color characteristic for example, gray feature and textural characteristics etc., in entire image, seek the position (for example position of characteristic body such as car light or car plate) of region-of-interest automatically, in the region-of-interest of determining, whether characteristics of image such as the brightness of image and texture satisfy the processing requirements of image recognition algorithm in the analyzed area, if satisfy, then need not regulate imaging parameters and light filling effect, directly change next video image over to and carry out process as mentioned above again; Otherwise, carry out the control of imaging effect, judge whether that at first the parameter of controlling video camera imaging has been adjusted to maximum (for example shutter has been transferred to maximum), if do not have, then regulate imaging parameters, change next video image over to and carry out process as mentioned above again; Otherwise illustrate to rely on the functional parameter of video camera itself that image is met the demands, then start light compensating apparatus, determine the parameters such as illumination brightness of light compensating apparatus, the while is according to the imaging parameters of light filling intensity adjustments video camera, to reach best imaging effect.
See also Fig. 7, this is image storage of the present invention, output principle flow chart.By pick-up lens (LENS), CCD cmos sensor and analog-to-digital conversion equipment, the digital video image that meets processing requirements is arrived buffer storage by real-time storage, memory size size according to buffer storage, system preserves the video image of a period of time length of user's setting, and according to the rule of first-in first-out, with the automatic flush buffers of the step-length of default district, the vedio data that promptly always can preserve this section period in the buffer storage calls analysis for digital signal processing unit.Digital signal processing unit is provided with parameter and traffic rules information according to the system that the user sets, the image processing and the algorithm for pattern recognition (for example license plate identification and Video Detection etc.) that load in the operation digital signal processing unit are realized the identification license plate, are detected the function that users such as traffic flow parameter, identification traffic events and traffic behavior need; Digital signal processing unit requires video image is carried out the compressed encoding processing according to the picture quality of default then, video image after the compression is recorded in the buffer storage, vedio data can be saved in this machine memory cell according to customer requirements, otherwise will be cushioned the memory refress deletion, according to necessarily requiring the video flowing rate, realize function by communication control unit for associated user's monitor video image by communication interface (Ethernet interface, serial ports or USB interface etc.) output.Buffer storage is to refresh in real time according to certain step-length in the whole process.
Video camera can adopt external trigger to report to the police (for example manually finding the traffic events warning) for the response of traffic events, vehicles peccancy and blacklist vehicle and interior video triggers (for example detect the blacklist vehicle and be judged to be vehicle violating the regulations) the multiple mode of reporting to the police.If alert event has taken place, then the video image before the incident of buffering area stored can be deposited in the memory cell, and continue the process of record whole event, till incident finishes.
When Network Transmission is interrupted, the file that optional video flow rate of automatic storage and picture quality can be set in this video camera, but when network recovery remote download; Consider the demand of portable wireless and portable equipment, video camera possesses external cable power, three kinds of patterns of sun-generated electric power and chargeable source, be fit to by power supply unit and the open-air situation that breaks away from cable power of checking that moves, the sustainable a period of time continuous operation of charge power supply, power supply and communication part all adopt existing techniques in realizing, so do not describe in detail.
The present invention is primarily aimed at the intelligent transportation field of video monitoring, promptly can use, also can do the hardware and software platform use of product secondary development for the research and development department that is engaged in the video traffic product as products such as plate recognition system, video detection system and traffic events detection systems.Be mainly used in traffic control system, public security traffic vehicle auditing system, electronic police and management system violating the regulations etc., promptly can use, also can be used as portable, the traffic administration of hand-hold type, inspection equipment uses as the fixed-point type traffic administration, inspection equipment of monitoring fixed-site.
Claims (10)
1, a kind of intelligent camera with traffic monitoring special function comprises casing, is located at pick-up lens, each functional interface and each function button of being located at machine shell panel of suitable position in the casing and is located in the casing the image forming control circuit that becomes with each functional interface and the electrical connection of each function button; Described one-tenth image forming control circuit comprises imaging circuit, image processing control circuit, light compensating apparatus, memory cell and communication control unit; Described imaging circuit comprises transducer and drive circuit, and described transducer is used to receive the image that pick-up lens takes in and produces analog signal and outputs to image processing control circuit; It is characterized in that,
Described image processing control circuit comprises one analog-to-digital conversion/image pre-process circuit, one imaging/light filling control circuit, a buffer storage and a digital signal processing unit, wherein:
Described analog-to-digital conversion/the input of image pre-process circuit is connected with the output of transducer, and this analog-to-digital conversion/output of image pre-process circuit is connected with the input of buffer storage;
Described imaging/the input of light filling control circuit is connected with the output of drive circuit, and its output is connected with transducer with light compensating apparatus respectively;
Described buffer storage is connected with memory cell is two-way, and the input of this buffer storage is connected with the output of control unit with the analog-to-digital conversion/output of image pre-process circuit respectively;
Described digital signal processing unit is respectively with imaging/light filling control circuit and buffer storage is two-way is connected, and the output of this digital signal processing unit also is connected with the input of communication control unit.
2, the intelligent camera with traffic monitoring special function according to claim 1 is characterized in that, described imaging/light filling control circuit mainly is made of a single-chip microcomputer.
3, the intelligent camera with traffic monitoring special function according to claim 1 is characterized in that, described light compensating apparatus is constituted by photoflash lamp or LED or the two.
4, the intelligent camera with traffic monitoring special function according to claim 1, it is characterized in that set functional interface comprises or comprise standard radio communication interface, the interface of supporting the communications protocol of international standard that has by expansion equipment, the interface of supporting display device and General-Purpose Output and the interface of support standard input device and the interface of related protocol on the described video camera machine shell panel.
5, the intelligent camera with traffic monitoring special function according to claim 1 is characterized in that, set function button comprises power knob, shutter release button and manually captures image button on the described video camera machine shell panel.
6, use the intelligent camera method that intelligent camera carries out traffic monitoring, it is characterized in that, may further comprise the steps;
A will comprise that by pick-up lens the car profile of mobile motor vehicle and the traffic scene image of license plate catch, and be transported to image processing control circuit by transducer;
After the video signal of b, simulation is input to image processing control circuit, through analog-to-digital conversion, and carries out becoming satisfactory digital picture after the image preliminary treatment and store in the buffer storage;
C, digital signal digital signal processing unit obtain every width of cloth data image signal from the buffering memory, and every width of cloth digital picture is sought automatically the position of region-of-interest, in the region-of-interest of determining, analyze the processing requirements whether characteristics of image in this zone satisfies image recognition, if satisfy, directly change the identification of carrying out the next frame video image over to and handle; Otherwise, generate imaging and light filling control command and send to imaging/light filling control circuit, carry out the control of imaging and light filling effect;
D, digital signal processing unit obtain the characteristics of image and the information of region-of-interest from sequence of video images, requiring that according to predefined picture quality satisfactory digital video image is carried out compressed encoding simultaneously handles, generate the video streaming image or the single image of certain compression ratio, and with these features and information by send in real time by communication control unit or by buffer memory stores in memory cell.
7, application intelligent camera according to claim 6 carries out the intelligent camera method of traffic monitoring, it is characterized in that, the step of the control of the described imaging effect of c step is:
At first judge that by imaging/light filling control circuit whether the parameter of control imaging circuit has been adjusted to maximum, if do not have, then changes the judgement to the imaging parameters of next frame video image over to; Otherwise then start light compensating apparatus, regulate the illumination luminance parameter, simultaneously according to light filling intensity adjustments imaging parameters, to reach best imaging effect.
8, application intelligent camera according to claim 6 carries out the intelligent camera method of traffic monitoring, it is characterized in that, the characteristics of image of the described region-of-interest of c step is meant color characteristic, gray feature or textural characteristics, and vehicle license, vehicle, the speed of a motor vehicle, vehicle flowrate, vehicle peccancy judgement information and traffic event information.
9, application intelligent camera according to claim 6 carries out the intelligent camera method of traffic monitoring, it is characterized in that, the d step is described to be meant to the requirement in the memory cell by buffer memory stores: after preserving predefined a period of time length for the video image real time record to buffer storage, buffer storage is according to the automatic flush buffers of the step-length district that sets, if alert event has taken place, then the video image before the incident of buffering area stored is deposited in the memory cell, and continue the process of record whole event, till incident finishes, otherwise, do not store.
10, application intelligent camera according to claim 7 carries out the intelligent camera method of traffic monitoring, it is characterized in that, imaging/light filling control circuit judges that the parameter of control imaging circuit is meant: digital signal processing unit is sought the image region-of-interest of dynamic change adaptively, generate respective imaging and light filling control command by adaptive algorithm, be controlled to the picture time for exposure length of circuit sensor and the light filling effect of light compensating apparatus by light filling/control unit, make video image remain on to be suitable for most the requirement of license plate identification and Video Detection always for picture quality.
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