CN102867385A - Building security system and building security method based on pulse light spot array pattern change detection - Google Patents
Building security system and building security method based on pulse light spot array pattern change detection Download PDFInfo
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- CN102867385A CN102867385A CN2012103646685A CN201210364668A CN102867385A CN 102867385 A CN102867385 A CN 102867385A CN 2012103646685 A CN2012103646685 A CN 2012103646685A CN 201210364668 A CN201210364668 A CN 201210364668A CN 102867385 A CN102867385 A CN 102867385A
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Abstract
The invention provides a building security system and a building security method based on pulse light spot array pattern change detection. The building security system comprises a camera, a mainframe, a warning device and a light source, the light source gives out dot matrix rays by a pulse irradiation method, the dot matrix rays irradiate on a detection area to form a light spot array, a sensor for detecting the light spot array is arranged in the camera, and a grating used for adjusting shape of the light spot array and number of light spots is further arranged in front of the light source. Real-timeness and improved efficiency of detection can be achieved by adjusting the light spots and parameters of an image sensor, the building security is easy to implement and low in cost, and has a great application prospect. The building security method is capable of realizing intrusion detection within a variable range by changing the number of the light spots, light spot array pattern and position of the light source for changing detection range.
Description
Technical field
The invention belongs to the building technical field of security and protection, relate to safety-protection system to the detection of foreign object invasion, particularly a kind of real-time variation detects based on pulse hot spot system of battle formations sample building safety-protection system and safety protection method.
Background technology
Along with the raising of people's living standard and the increase of security precautions, the application of safety-protection system is more and more extensive.At present, the technological means that adopts in the safety-protection system mainly contains: based on the guard technology of traditional sensors (infrared, Men Ci etc.), based on the guard technology of bio-identification with based on the guard technology of video monitoring, wherein, the traditional sensors function is relatively simple, usually be installed in the gateway, need passive triggering to report to the police, yet in case grasp the triggering characteristics of this sensor, avoid this defence line, road, so such guard system has just performed practically no function, and such guard system often is subject to the interference of some non-burglar's moving objects, and False Rate is higher.And need equally passive triggering based on the guard technology of biological identification, and be only applicable to access control, have equally and based on the similar problem of the guard technology of traditional sensors.
At present, many video monitoring products of making based on the guard technology of video monitoring are arranged, this class monitoring product is host node mainly with PC, adopt video camera uninterrupted monitoring in 24 hours, the video recording of the screen at recording and storing scene, perhaps by special staff by monitor scope in order to note abnormalities event.Can only play simple video recording function like this, very high to the hard-disk capacity requirement of PC, need simultaneously to be equipped with special messenger's monitoring video, so that the cost price of whole system is high.And this type of video monitoring product only rests on record toward contact and preserves on the video image, do not carry out real-time, intelligent processing method in these massive video data.
For general security protection video monitoring product, have following several large principle to observe: the one, extremely low loss and false drop rate do not allow to make mistakes in extreme scenes.The 2nd, the antijamming capability of equipment is strong, comprises the non-artificial factor that exists in the environment, such as the variation of sound, light, temperature; Also comprise simultaneously the destruction that some are artificial, as wireless telecommunication shielding, power supply cut off, artificial covering etc.The 3rd, for the scene of extensively deploying troops on garrison duty and deploying troops on garrison duty temporarily, cost of products need to have certain control.The 4th, deploying troops on garrison duty should not be too complicated.The 5th, safety-protection system need to have certain disguise.
The greatest problem that all carry out analyzing and processing to video and the monitoring product that judges faces is flase drop and undetected problem.Undetected meeting causes great potential safety hazard in safety-security area, and undetected existence is belonged to zero tolerance; And flase drop can cause unnecessary personnel's equipment to transfer, the wasting manpower and material resources.Therefore this type systematic is being born the task of reducing simultaneously false drop rate and loss, and this is a great difficult point to analyzing recognizer and system constructing.
Summary of the invention
The present invention is intended to solve at least the technical matters that exists in the prior art, has proposed to special innovation a kind of building safety-protection system and safety protection method that detects that change based on pulse hot spot system of battle formations sample.
In order to realize above-mentioned purpose of the present invention, according to an aspect of the present invention, the invention provides a kind of building safety-protection system that detects that changes based on pulse hot spot system of battle formations sample, it comprises that the visual field covers the camera of surveyed area, link to each other with described camera, for the main frame that described camera photographic images is processed, link to each other with described main frame, the warning device of reporting to the police when the foreign object invasion is arranged and the light of emission cover the light source of described surveyed area, the position of described camera and described light source is adjustable, described light source adopts the pulse irradiation mode to send dot matrix light, described dot matrix light shines and forms the hot spot matrix on the described surveyed area, be provided with the sensor that detects described hot spot matrix in the described camera, before described light source, also be provided be used to the grating of regulating described hot spot matrix shape and number of spots.
Building safety-protection system of the present invention can bring the lifting that detects real-time and efficient by the parameter of adjusting hot spot and imageing sensor, realizes than being easier to, and cost is low, has great application prospect.
In a preferred embodiment of the present invention, the distance of described camera and described light source is 10cm-20cm.
In another kind of preferred embodiment of the present invention, the spot densities on the described surveyed area is 100/m
2-400/m
2
Building safety-protection system of the present invention can change sensing range by change number of spots, Spot Moment system of battle formations sample and light source position, has the ability of carrying out intrusion detection in variable range.
In order to realize above-mentioned purpose of the present invention, according to another aspect of the present invention, the invention provides a kind of building safety protection method that detects that changes based on pulse hot spot system of battle formations sample, it comprises the steps:
S1: make up the building safety-protection system that detects that changes based on pulse hot spot system of battle formations sample claimed in claim 1;
S2: the hot spot matrix image to surveyed area carries out initialization, obtains initial pictures hot spot coordinate;
S3: described camera is taken and is passed the image that photographs back main frame;
S4: the described main frame image that shooting obtains according to camera extracts the hot spot coordinate and compares with initial pictures hot spot coordinate, has judged whether the foreign object invasion, if the foreign object invasion is arranged, then reports to the police, if there is not foreign object to invade, then returns step S3 and continues to detect.
Building safety protection method of the present invention changes sensing range by change number of spots, Spot Moment system of battle formations sample and light source position, have the ability of carrying out intrusion detection in variable range, the present invention can bring the lifting that detects real-time and efficient by the parameter of adjusting hot spot and imageing sensor.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment in conjunction with following accompanying drawing, wherein:
Fig. 1 the present invention is based on the system chart that pulse hot spot system of battle formations sample changes the building safety-protection system that detects;
Fig. 2 is that spot densities of the present invention changes schematic diagram;
Fig. 3 is the schematic diagram that light source of the present invention and camera spacing affect spot displacement;
Fig. 4 utilizes building safety protection method of the present invention to carry out the schematic diagram of foreign object intrusion detection.
Embodiment
The below describes embodiments of the invention in detail, and the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, term " vertically ", " laterally ", " on ", orientation or the position relationship of the indications such as D score, 'fornt', 'back', " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward " be based on orientation shown in the drawings or position relationship, only be for convenience of description the present invention and simplified characterization, rather than indication or the hint device of indication or element must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.
In description of the invention, unless otherwise prescribed and limit, need to prove, term " installation ", " linking to each other ", " connection " should be done broad understanding, for example, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly to link to each other, and also can indirectly link to each other by intermediary, for the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term.
The invention provides a kind of building safety-protection system that detects that changes based on pulse hot spot system of battle formations sample, as shown in Figure 1, this building safety-protection system comprises that the visual field covers the camera of surveyed area, also comprise with this camera linking to each other, be used for main frame that the camera photographic images is processed, and the light source of the light covering surveyed area of the warning device that links to each other, when the foreign object invasion is arranged, reports to the police with main frame and emission.Wherein, the position of this camera and light source is adjustable, light source adopts the pulse irradiation mode to send dot matrix light, dot matrix light shines and forms the hot spot matrix on the surveyed area, in camera, be provided with and detect the imageing sensor that the hot spot matrix changes, before light source, also be provided with for the grating of regulating hot spot matrix shape and number of spots.
In the present embodiment, the position of light source to be set with respect to camera position, in order conveniently deploying troops on garrison duty, camera and light source to be placed side by side, only keep certain spacing.In a kind of preferred implementation of the present invention, the distance range of camera and light source is 10cm-20cm, and the distance that increases as far as possible camera and light source in the satisfiable situation of equipment packages is conducive to improve the spot displacement amplitude that observes.In a kind of embodiment that is more preferably of the present invention, the distance of camera and light source is 10cm.
In the present embodiment, it is the near-infrared light source of 850nm that light source adopts the wavelength that emits beam, human eye can't observe the hot spot matrix that irradiates, light source itself can observe and be faint red point, infrared light can be observed by sensor preferably, and can not discovered by human eye, guaranteed the disguise of system; Be the pulse irradiation mode with modulation of source simultaneously, light-pulse generator can be different from the interference of most of same frequency light of environment, such as the electric light in the indoor environment itself, and irradiation enters indoor sunburst, the mode of frame difference can reduce the constant light in the environment before and after using, the flicker frequency of light source need to be synchronous with the sample frequency of sensor, the break-make of the signal controlling light source power that native system use sensor provides, and inner light source of every two field picture time shutter of strict guarantee is bright dark stable.
As shown in Figure 2, the present invention is based on and continue the displacement that observation shines hot spot in the Spot Moment system of battle formations sample on the surveyed area and detect the foreign object invasion, of the present inventionly change the building safety protection method that detects based on pulse hot spot system of battle formations sample and comprise the steps:
S1: make up the building safety-protection system that detects that changes based on pulse hot spot system of battle formations sample of the present invention;
S2: the hot spot matrix image to surveyed area carries out initialization, obtains initial pictures hot spot coordinate;
S3: camera is taken and is passed the image that photographs back main frame;
S4: the main frame image that shooting obtains according to camera extracts the hot spot coordinate and compares with initial pictures hot spot coordinate, has judged whether the foreign object invasion, if the foreign object invasion is arranged, then reports to the police, if there is not foreign object to invade, then returns step S3 and continues to detect.
When utilizing building safety-protection system of the present invention to carry out security protection, concrete step is:
The first step: make up the building safety-protection system that detects that changes based on pulse hot spot system of battle formations sample of the present invention.
Second step: the hot spot matrix image to surveyed area carries out initialization, obtains initial pictures hot spot coordinate.In the present embodiment, the hot spot matrix image of surveyed area carried out density and the adjustment hot spot Matrix Pattern that initialization comprises the distance of adjusting camera and light source, the size of adjusting hot spot, adjustment hot spot.
In the present invention, in order not occur undetected and situation false retrieval, hot spot need to satisfy two conditions, and the one, spot densities meets the demands, and namely needing in the unit area has abundant hot spot, displacement appears in abundant hot spot when guaranteeing the foreign object invasion, if only there is the only a few hot spot that shake is arranged, be likely owing to unstable the causing in the environment, such as vibration and atmospheric density non-uniform temperature etc., in the present embodiment, the spot densities on the surveyed area is 100/m
2-400/m
2, should improve as far as possible spot densities in the situation that light source power is enough.In a kind of embodiment that is more preferably of the present invention, spot densities is 100-225/m
2The 2nd, the spot displacement distance, namely foreign object single hot spot of when invasion need to have enough displacements, can detect displacement under the limited condition of sensor accuracy.As can be seen from Fig. 3, along with light source and sensor move closer to, sensor is equivalent to leave for the observation surveyed area along the source light direction, even cause having the foreign object invasion, the hot spot that observes is still not very large displacement on imaging plane, thereby cause thrashing, therefore, occur for avoiding undetected situation, need to adjust the distance of camera and light source, make the displacement of foreign object when invasion hot spot enough large, in the present embodiment, the distance of camera and described light source is 10cm.
Simultaneously, hot spot is unsuitable excessive on the surveyed area, otherwise can cause energy to disperse, a little less than the hot spot that sensor observes is too dark, even in fine situation, covered dimension by daylight, in the present embodiment, sensitivity according to sensor is regulated the spot size of light source, makes energy that sensor detects hot spot on the surveyed area greater than its detection threshold, avoids the generation of undetected situation.
In addition, by the grating before the adjustment light source, change that grating focuses on and to the scattering degree of hot spot, adjust number and the hot spot Matrix Pattern of light source hot spot, in the present embodiment, the hot spot spacing is unsuitable excessive, be advisable with 2-3/20cm, as shown in Figure 2, at least to guarantee that the various sides of human body have abundant hot spot to shine on the human body when presenting to camera, in the present embodiment, sensor accuracy requirement image when the foreign object invasion is arranged shows as 5-10 hot spot and is subjected to displacement, and need to prove, present embodiment is to detect artificial purpose, when detecting target not simultaneously, need number of spots, the geometric parameters such as hot spot Matrix Pattern adjust accordingly, and meet the demands as target take the number of spots that shines on the inspected object.
According to above step, the initial pattern of hot spot matrix when having obtained invading without foreign object obtains the center-of-mass coordinate of hot spot by operations such as dilation erosion thresholding clusters.Wherein hot spot shows as the solid circles speck of certain physical dimension in image, and the center-of-mass coordinate after the extraction only is a point on image, respectively shown in Fig. 4 (a) and Fig. 4 (b).
The 3rd step: camera remains that shooting state is taken and passes the image that photographs back main frame.
The 4th step: the main frame image that shooting obtains according to camera extracts the hot spot coordinate and compares with initial pictures hot spot coordinate, has judged whether the foreign object invasion, if the foreign object invasion is arranged, then reports to the police, if there is not foreign object to invade, then returns for the 3rd step and continues to detect.The method that specifically judges whether foreign object invasion is: the image that obtains from shooting extracts the facula mass center coordinate and compares with initial pictures hot spot coordinate, if the hot spot coordinate that camera is taken on the image that obtains is subjected to displacement with respect to initial pictures hot spot coordinate, the simultaneous displacement hot spot satisfies some and condition of connectedness then represents to have the foreign object invasion.In the present embodiment, the displacement number of spots be no less than 3 and the convex polygon that surrounded by the displacement hot spot inner not during the displacement hot spot, then expression has the foreign object invasion.
In a preferred embodiment of the invention, as shown in Figure 4, when building safety protection method according to the present invention carries out security protection, the region division camera position that detects at first as required, with respect to camera position, light source position is set, the size of light source hot spot is set simultaneously, density and Spot Moment system of battle formations sample, obtain the original infrared image shown in Fig. 4 (a), the study through certain frame number image obtains initial pictures hot spot coordinate, and record, shown in Fig. 4 (b), wherein, Fig. 4 (b) the first half is original infrared image, the image of the latter half for obtaining through the study aftertreatment, brighter rectangle represents stable and stronger hot spot, and is suitable to the spot displacement discrimination standard, that is the stable lattice diagram that obtains in the learning process; The hot spot of soft dot for immediately observing, since adopted different thresholdings, namely to hot spot brightness settings high threshold and low threshold value, the hot spot of figure hollow core round dot for using high threshold to extract, the hot spot of black circle for extracting under the low threshold value, soft dot will be less than black circle.
Then, camera keeps shooting state, and normally without in the foreign object invasion situation, soft dot hot spot place must can observe black circle, but black circle may not have soft dot with correspondence.At a time take the image that obtains among Fig. 4 (c), the hot spot coordinate of the image shown in Fig. 4 (c) is compared with initial pictures hot spot coordinate, can see that the hot spot coordinate among Fig. 4 (c) with respect to the hot spot coordinate in the initial pictures of Fig. 4 (b) displacement has occured, through differentiating, if the connective and lasting frame number of the quantity of the displacement hot spot system of satisfying condition provides the foreign object intrusion alarm, in the present embodiment, continuous 10 frames have detected spot displacement in the situation that frame per second is 30fps, and the foreign object invasion is then arranged.
Building safety protection method of the present invention changes sensing range by change number of spots, Spot Moment system of battle formations sample and light source position, have the ability of carrying out intrusion detection in variable range, the present invention can bring the lifting that detects real-time and efficient by the parameter of adjusting hot spot and imageing sensor.
In the description of this instructions, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or the example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that: in the situation that do not break away from principle of the present invention and aim can be carried out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is limited by claim and equivalent thereof.
Claims (6)
1. building safety-protection system that change to detect based on pulse hot spot system of battle formations sample, it is characterized in that, comprise that the visual field covers the camera of surveyed area, link to each other with described camera, for the main frame that described camera photographic images is processed, link to each other with described main frame, the warning device of reporting to the police when the foreign object invasion is arranged and the light of emission cover the light source of described surveyed area, the position of described camera and described light source is adjustable, described light source adopts the pulse irradiation mode to send dot matrix light, described dot matrix light shines and forms the hot spot matrix on the described surveyed area, be provided with the imageing sensor that detects described hot spot matrix in the described camera, before described light source, also be provided be used to the grating of regulating described hot spot matrix shape and number of spots.
2. the building safety-protection system that detects that changes based on pulse hot spot system of battle formations sample as claimed in claim 1 is characterized in that, the distance range of described camera and described light source is 10cm-20cm.
3. the building safety-protection system that detects that changes based on pulse hot spot system of battle formations sample as claimed in claim 1 is characterized in that, the spot densities on the described surveyed area is 100/m
2-400/m
2
4. a building safety protection method that changes to detect based on pulse hot spot system of battle formations sample is characterized in that, comprises the steps:
S1: make up the building safety-protection system that detects that changes based on pulse hot spot system of battle formations sample claimed in claim 1;
S2: the hot spot matrix image to surveyed area carries out initialization, obtains initial pictures hot spot coordinate;
S3: described camera is taken and is passed the image that photographs back main frame;
S4: the described main frame image that shooting obtains according to camera extracts the hot spot coordinate and compares with initial pictures hot spot coordinate, has judged whether the foreign object invasion, if the foreign object invasion is arranged, then reports to the police, if there is not foreign object to invade, then returns step S3 and continues to detect.
5. the building safety protection method that change to detect based on pulse hot spot system of battle formations sample as claimed in claim 4, it is characterized in that, the hot spot matrix image of surveyed area is carried out initialization comprise and adjust camera and the distance of light source, the size of adjusting hot spot, the density of adjusting hot spot and adjustment hot spot Matrix Pattern.
6. the building safety protection method that change to detect based on pulse hot spot system of battle formations sample as claimed in claim 4, it is characterized in that, the method that judges whether the foreign object invasion is: if the hot spot coordinate that camera is taken on the image that obtains is subjected to displacement with respect to initial pictures hot spot coordinate, the quantity of simultaneous displacement hot spot is no less than 3 and the inner not displacement hot spot not of the convex polygon that surrounded by described displacement hot spot, and then expression has the foreign object invasion.
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Cited By (5)
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| CN102930682A (en) * | 2012-10-09 | 2013-02-13 | 清华大学 | Intrusion detection method based on displacement of light spot patterns |
| CN108564748A (en) * | 2018-07-06 | 2018-09-21 | 长春工程学院 | Transformer anti-theft alarm system |
| CN110969140A (en) * | 2019-12-12 | 2020-04-07 | 广东安居宝智能控制***有限公司 | Anti-smashing control method and device for barrier gate |
| CN110996074A (en) * | 2020-01-04 | 2020-04-10 | 盛广济 | Method for monitoring burst partition of curtain wall glass |
| CN111310576A (en) * | 2020-01-17 | 2020-06-19 | 厦门中控智慧信息技术有限公司 | Channel target passing detection method, device and equipment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102930682A (en) * | 2012-10-09 | 2013-02-13 | 清华大学 | Intrusion detection method based on displacement of light spot patterns |
| CN108564748A (en) * | 2018-07-06 | 2018-09-21 | 长春工程学院 | Transformer anti-theft alarm system |
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