CN103997622B - Automatic cleaning method of unattended monitoring camera - Google Patents
Automatic cleaning method of unattended monitoring camera Download PDFInfo
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- CN103997622B CN103997622B CN201410118049.7A CN201410118049A CN103997622B CN 103997622 B CN103997622 B CN 103997622B CN 201410118049 A CN201410118049 A CN 201410118049A CN 103997622 B CN103997622 B CN 103997622B
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Abstract
The invention discloses an automatic cleaning method of an unattended monitoring camera, and an automatic cleaning and alarming device of the unattended monitoring camera using the automatic cleaning method. The automatic cleaning method comprises six steps respectively: initializing a system, sampling a monitoring image, performing edge sharpening processing on the sampled image, comparing numbers of lines of the sampled image and a prestored image, comparing shapes of the sampled image and the prestored image, and cleaning and alarming. The invention further provides an automatic cleaning and alarming device of the unattended monitoring camera using the automatic cleaning method. The automatic cleaning and alarming device comprises a monitoring camera, a monitoring host, a DSP (Digital Signal Processor)-based identification module, a memory, an alarm circuit and an automatic camera cleaning circuit, an alarm device and an automatic cleaning device. The cleaning method and device provided by the invention are capable of carrying out unattended monitoring on the monitoring image, and automatically cleaning the camera or sending an alarm signal out under a proper condition.
Description
Technical field：
The present invention relates to the Aulomatizeted Detect of photographic head, it is specifically related to a kind of the automatically clear of unattended monitoring photographic head
Washing method.
Background technology：
There is no intelligent monitoring automatic clearing apparatuss patent at present, only exist and need people to monitor come the automatic cleaning to operate
The patent of device, prior art is come the automatic clearing apparatuss of remote control monitoring device using switch or button, needs artificial coming
Judged and operated.
There are following two big shortcomings in prior art：
1) erroneous judgement to image sharpness for the people.In this case it is simply that obviously existing on camera lens messy and needing
Part to be cleaned, but the static picture image seen from display can be said to be clear on the whole, thus easilys lead to
When video recording reviewed by needs, in picture, the details of parts of images is imperfect, thus omitting important image information, particularly exists
Under conditions of the quantity of monitoring camera is especially many.
2) not strong to the real-time of picture quality monitoring.Carry out artificially on duty under conditions of, occur unavoidably personnel from
Situation about opening, during this period of time, when burst sex chromosome mosaicism occurring if there is monitored picture, for example：Unexpected image letter
Number interrupt or paroxysmal camera lens be contaminated, operator on duty also cannot obtain correlation information, to intervene when artificial when
Wait, perhaps had already passed by many important monitoring informations.The present invention can greatly reduce needs artificial operation, mitigates and safeguards
The workload of personnel, the cleaning being capable of intelligence is judged as sordid camera lens so that the image information of storage can be completeer
Whole.Simultaneously can also be when the problem that cannot automatically solve in the image frame of monitor in real time, in time to attendant
Signal an alert.
Content of the invention：
It is a primary object of the present invention to provide a kind of auto-cleaning method of unattended monitoring equipment is above scarce to overcome
Point.Be specifically related to work out of doors or the more severe monitoring camera of working environment automatic cleaning, be especially operated in
Dust is than the automatic cleaning of the monitoring camera in the more serious or easy environment by man's activity.
Because often some need the working condition monitoring is 24 hours, such rotational personnel is continual all the time on duty
In Control Room, whether normal and clear to observe the picture that monitoring device passes back.The problem that the present invention solves is by based on DSP
The working condition of the image processing techniquess definition and monitoring device to monitor the picture that monitoring device is passed back in real time be
No normal, and under suitable conditions, timely tell the working condition of attendant's monitoring device.Thus realizing monitoring is set
Standby unmanned and automatic cleaning.
The present invention by memorizer first record one group not in the same time when camera lens clean when monitoring image picture, then
Enter row operation with the sampled picture of actual photographed to compare, if it find that the definition of the picture than storage for the picture of sampling is poor arriving
Start the equipment (motor of rain brush, shower nozzle of cleaning solution etc.) of cleaning camera lens when certain threshold value, carry out again after cleaning
Relatively, if the work of high definition just stopping motor after certain threshold value.But if after multiple cleaning, definition does not have
If threshold value, an alarm signal will be provided, to management personnel to point out.If picture signal is imperfect or be subject to
To when larger interference, alarm signal also can be provided.
In normal circumstances, the shooting background corresponding to the picture captured by photographic head is constant.Then enter in DVR
During the storage of row picture, all can adopt the storage mode of " dynamic detection " in order to save memory space general user, only deposit
Storage is when the picture that there is dynamic object in picture.And the discriminating gear in the present invention is then in contrast, that is, when DVR starts to store picture
When face, it does not carry out picture samples；When DVR does not carry out storage operation, it proceeds by the picture of intermittent
Sampling.The picture sampled back is passed through to sharpen the image processing method at edge, to distinguish the quantity of lines in image and to prestore
Whether the lines quantity in image reduces or increases, and after both differences are more than certain value, are judged as image blurring, then start
Cleaning device, device to be cleaned after hours, is sampled again and is carried out picture process and compare, if both differences reduce,
And less than if certain value, it is judged as this cleaning and terminates；If difference does not narrow down to expected value, just again
Start cleaning device, if after multiple cleaning terminates, the lines quantity in real-time pictures is still not reaching to expected model
In enclosing, just start circuit for alarming, notify attendant.If mud point or other shelters are existed on camera lens, that
In image, the position of lines distribution can be changed, if lines distribution is too many with the lines differing distribution of the picture that prestores,
Equally also can be judged as camera lens needs to clean.
Also suffer from the change of weather and light intensity additionally, due to the environment shooting and affect, in order that this system can
Adapt to the working environment of different weather, need to store corresponding pre-stored image according to different weather and light intensity, then entering
When row monitor in real time, the change according to environment to be chosen suitable pre-stored image and to be compared.If because environment
Change and lead to the triggering of circuit for alarming, attendant can improve the reliability of this system by way of resetting pre-stored image
Property.
Specifically, first step that the present invention cleans automatically is system initialization：Default first one group not in the same time when,
Monitoring image picture when camera lens is clean is as pre-stored image, and is stored in memorizer.The present invention automatically cleaning the
Two steps are monitoring image picture samples：When monitoring host computer does not carry out storage operation, image capturing system starts
Carry out the monitoring image picture samples of intermittent.The 3rd step that the present invention cleans automatically is that sampled images sharpen edge
Reason：Image sharpening edge treated is carried out to sampled images, and is tentatively judged, whether judge the lines quantity after Edge contrast
Excessive or very few, excessive or very few if, the just effective image of explanation sampling, enter the 6th step of the present invention, no
Then enter next step.The 4th step that the present invention cleans automatically is that sampled images are compared with the lines quantity of pre-stored image：?
Lines quantity and the lines quantity also passing through the pre-stored image sharpening edge treated through the sampled images of sharpening edge treated
Contrasted, if difference is less than given threshold value, entered next step；If difference is more than or equal to given threshold value, it is judged as
Obscure for camera image, continue the 6th step of the present invention.The 5th step that the present invention cleans automatically is sampled images
Shape matching with pre-stored image：The mode that sampled images through sharpening edge treated are carried out displacement sharpens edge with passing through
The pre-stored image processing carries out overlapping computing, and the value taking out lines minimum after wherein both are overlapping is compared with default threshold value, little
It is judged as camera lens clearly in the image equal to threshold value, return second step；If greater than threshold value, then enter the of the present invention
Six steps.Automatically the 6th step of cleaning is to clean and warning link to the present invention：Start cleaning device, and this step is tired out
The number of times of meter is counted, and when stored count is less than given number of times, returns the 4th step of the present invention；When stored count be more than or
It is equal to given number of times, is judged to need manual intervention, start circuit for alarming, notify attendant.
Present invention simultaneously provides a kind of unattended monitoring photographic head using described auto-cleaning method automatically cleaning and
Warning devicess, this device includes：Monitoring camera, monitoring host computer, the identification module based on DSP, memorizer, circuit for alarming and take the photograph
As the automatic cleaning circuit of head, warning devicess, automatic clearing apparatuss.Monitoring host computer do not carry out storage operation when, to prison
Control photographic head carries out the image sampling of intermittent, and the sampled images obtaining are sent to the identification module based on DSP, is based on
Monitoring image picture when the identification module of DSP is chosen one group camera lens is not clean in the same time is as pre-stored image, and stores
In memorizer, meanwhile, the identification module based on DSP can extract, from memorizer, the figure that prestores when judging the definition of photographic head
Picture.Circuit for alarming and the automatic cleaning circuit of photographic head are connected respectively with warning devicess and automatic clearing apparatuss, and the present invention's is unmanned
Automatically cleaning and warning devicess are carried out using above-mentioned auto-cleaning method and report to the police monitoring camera on duty.
Beneficial effect：
The present invention can realize the unattended monitored picture of monitoring camera and monitor, and automatically clear in a suitable case
Wash photographic head or provide alarm signal.
Auto-cleaning method of the present invention employs following 3 Main Means：
One. by the definition to judge monitoring camera is compared with sampling to prestoring of static object in monitored picture.This
It is possible to avoid because there is dynamic object in picture if sample, and lead to the good object of reference of neither one whole to judge
The situation of pollution be whether there is on the camera lens of photographic head；
Two. by judging the definition of picture using the method for the edge sharpening in image procossing.By edge sharpening
Method so that the edge between static object in picture becomes more fully apparent, the mutation of color becomes more bright
Aobvious, consequently facilitating the comprised number of lines of processor statistics；
Three. whether by having within a period of time, to carry out multiple cleaning unclear come the such picture of intelligent decision
Clear whether can be cleaned.So whether effectively words can effectively judge taken cleaning, would not because of due to
Clean operation for image definition do not act on and lead to ceaselessly send clean operation order.
Brief description：
Fig. 1 is working-flow figure.
Specific embodiment：
In order that technological means, creation characteristic, reached purpose and effect that the present invention realizes are easy to understand, tie below
Close brief description, the present invention is further elaborated.
First step that the present invention cleans automatically is system initialization：First, system power-on reset.Program is from FLASH
Bootstrapping, completes the importing of image processing program, and the internal memory of pre-stored image imports, that is, preset one group not in the same time when, camera lens is clean
When monitoring image picture as pre-stored image, and be stored in memorizer.Next carries out some initial work, as before
SDRAM of beginningization EMIF interface etc., the then triggering of waiting signal.The second step that the present invention cleans automatically is monitoring image
Picture samples：When monitoring host computer does not carry out storage operation, image capturing system proceeds by the monitoring figure of intermittent
As picture samples.When not having dynamic menu in the image captured by specifically when monitoring camera, the trigger that DVR is given will
Make generation DSP interrupt, DSP utilizes I2C bus to pass through serial line interface and writes relevant parameter to the depositor of image collection chip, promotees
It is made to carry out image acquisition.CPLD completes frame control, sequential logic and the necessary address signal of generation of acquisition chip, secondly,
CPLD also carries out necessary logic control to the interface FIFO of image capture module and image processing module.Image acquisition form is
The 16bitRGB of 512x512, can generate the RGB image of 24bit by image collection chip peripheral circuit and latch.Figure
As the DMA channel by DSP through FIFO, on the one hand it is stored in SDRAM, so that DSP carries out image procossing, on the other hand can lead to
Cross DMA and be displayed for reference through the incoming PC of pci bus.The 3rd step that the present invention cleans automatically is that sampled images sharpen side
Edge is processed：Image sharpening edge treated is carried out to sampled images, and is tentatively judged, judge the lines quantity after Edge contrast
Whether excessive or very few, excessive or very few if, the just effective image of explanation sampling, enter the 6th step of the present invention
Suddenly, otherwise enter next step.In this step, FLASH is stored in image processing algorithm, is imported in DSP by the EMIF of DSP and carries out
Image processing operations.The 4th step that the present invention cleans automatically is that sampled images are compared with the lines quantity of pre-stored image：?
Lines quantity and the lines quantity also passing through the pre-stored image sharpening edge treated through the sampled images of sharpening edge treated
Contrasted, if difference is less than given threshold value, entered next step；If difference is more than or equal to given threshold value, it is judged as
Obscure for camera image, continue the 6th step of the present invention.The 5th step that the present invention cleans automatically is sampled images
Shape matching with pre-stored image：The mode that sampled images through sharpening edge treated are carried out displacement sharpens edge with passing through
The pre-stored image processing carries out overlapping computing, and the value taking out lines minimum after wherein both are overlapping is compared with default threshold value, little
It is judged as camera lens clearly in the image equal to threshold value, return second step；If greater than threshold value, then enter the of the present invention
Six steps.Automatically the 6th step of cleaning is to clean and warning link to the present invention：Start cleaning device, and this step is tired out
The number of times of meter is counted, and when stored count is less than given number of times, returns the 4th step of the present invention；When stored count be more than or
It is equal to given number of times, is judged to need manual intervention, start circuit for alarming, notify attendant, wash number is zeroed simultaneously.
Automatically cleaning and warning devicess include the unattended monitoring photographic head that the present invention provides：Monitoring camera, monitoring
Main frame, the identification module based on DSP, memorizer, circuit for alarming and the automatic cleaning circuit of photographic head, warning devicess, automatically cleaning
Device.Monitoring host computer do not carry out storage operation when, the picture that the identification module based on DSP is passed back to monitoring camera
Carry out the image sampling of intermittent, then the sampled images obtaining are sent to the identification module based on DSP, the knowledge based on DSP
Other module choose one group of corresponding moment camera lens clean when the monitoring image picture that prestores be compared with the picture of sampling, use
It is used as judging photographic head whether clearly foundation；Circuit for alarming and the automatic cleaning circuit of photographic head and warning devicess and automatically clear
Cleaning device connects respectively.The specific flow process of system operation is as follows:
First, 1. system power-on reset.Program is booted from FLASH, completes the importing of image processing program, pre-stored image
Internal memory imports and some initial work, such as SDRAM of initialization EMIF interface etc., the then triggering of waiting signal.
2., when not having dynamic menu in the image captured by when monitoring camera, the trigger that DVR is given will make generation
DSP interrupt, DSP utilizes I2C bus to pass through serial line interface and writes relevant parameter to the depositor of image collection chip, promotes it to enter
Row image acquisition.
3.CPLD completes frame control, sequential logic and the necessary address signal of generation of acquisition chip, and secondly, CPLD is also right
The interface FIFO of image capture module and image processing module carries out necessary logic control.Image acquisition form is 512x512
16bitRGB, the RGB image of 24bit can be generated by image collection chip peripheral circuit and latch.
4. image through FIFO the DMA channel by DSP, be on the one hand stored in SDRAM, so that DSP carries out image procossing, separately
On the one hand reference can be displayed for through the incoming PC of pci bus by DMA.
5.FLASH is stored in image processing algorithm, is imported in DSP by the EMIF of DSP and carries out image processing operations.
6. processing result image carries out judging whether to need to provide alarm signal and starts cleaning device.
More than be shown and described is ultimate principle, principal character and the advantages of the present invention of the present invention.The skill of the industry
The simply explanation it should be appreciated that the present invention is not restricted to the described embodiments, described in above-described embodiment and description for the art personnel
The principle of the present invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, these
Changes and improvements both fall within scope of the claimed invention.Claimed scope by appending claims and
Its equivalent defines.
Claims (2)
1. a kind of auto-cleaning method of unattended monitoring photographic head, including following 6 steps：
One. system initialization：Default first one group not in the same time when, monitoring image picture when camera lens is clean is as pre-
Deposit image, and be stored in memorizer；
Two. monitoring image picture samples：When monitoring host computer do not carry out storage operation when, image capturing system start into
The monitoring image picture samples of between-line spacing；
Three. sampled images sharpen edge treated：Image sharpening edge treated is carried out to sampled images, and is tentatively judged,
Judge whether the lines quantity after Edge contrast excessive or very few, excessive or very few if, just the image of explanation sampling is no
Effect, enters the 6th step of the present invention, otherwise enters next step；
Four. sampled images are compared with the lines quantity of pre-stored image：Lines the sampled images through sharpening edge treated
Quantity is contrasted with the lines quantity also passing through the pre-stored image sharpening edge treated, if difference is less than given threshold value,
Enter next step；If difference is more than or equal to given threshold value, it is judged as camera image and obscures, continue the 6th of the present invention the
Individual step；
Five. the shape matching of sampled images and pre-stored image：Sampled images through sharpening edge treated are carried out the side of displacement
Formula carries out overlapping computing with the pre-stored image through sharpening edge treated, take out wherein after both overlaps the minimum value of lines with
Default threshold value compares, and is judged as camera lens clearly less than or equal to the image of threshold value, returns second step；If greater than threshold
Value, then enter the 6th step of the present invention；
Six. cleaning and warning link：Start cleaning device, and the wash number that this step is added up counts, when accumulative
Cleaning count is less than given number of times, returns the 4th step of the present invention；When accumulative Cleaning count is more than or equal to given number of times, sentence
It is set to and needs manual intervention, start circuit for alarming, notify attendant, wash number is zeroed simultaneously.
2. a kind of usage right requires the unattended monitoring shooting of the auto-cleaning method of unattended monitoring photographic head described in 1
Head cleaning and warning devicess automatically, this device includes：Monitoring camera, monitoring host computer, the identification module based on DSP, memorizer,
Circuit for alarming and the automatic cleaning circuit of photographic head, warning devicess, automatic clearing apparatuss；Monitoring host computer is not carrying out storage operation
When, monitoring camera is carried out with the image sampling of intermittent, and the sampled images obtaining are sent to the identification based on DSP
Module, based on DSP identification module choose one group camera lens is not clean in the same time when monitoring image picture as the figure that prestores
Picture, and it is stored in memorizer, meanwhile, the identification module based on DSP can carry from memorizer when judging the definition of photographic head
Take pre-stored image；Circuit for alarming and the automatic cleaning circuit of photographic head are connected respectively with warning devicess and automatic clearing apparatuss.
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| CN201410118049.7A CN103997622B (en) | 2014-03-27 | 2014-03-27 | Automatic cleaning method of unattended monitoring camera |
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| CN109177929A (en) * | 2018-09-29 | 2019-01-11 | 北京经纬恒润科技有限公司 | A kind of cleaning method, cleaning device and the vehicle of vehicle-mounted optical detector |
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| CN111055814A (en) * | 2019-12-12 | 2020-04-24 | 新石器慧通（北京）科技有限公司 | Cleaning method and cleaning system of environment perception sensor and unmanned vehicle |
| CN111064870A (en) * | 2019-12-13 | 2020-04-24 | 深圳拓邦股份有限公司 | Lens cleaning method, control device and storage medium of visual robot |
| CN111147761A (en) * | 2019-12-28 | 2020-05-12 | 中国第一汽车股份有限公司 | Vehicle camera equipment cleaning method and system, vehicle and storage medium |
| EP4117503A4 (en) * | 2020-03-12 | 2023-11-29 | Covidien LP | Methods and systems for realtime monitoring and cleaning of a laparoscopic lens |
| CN113542556A (en) * | 2021-06-29 | 2021-10-22 | 钱强 | Building monitoring system and device based on big data |
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