CN102568202B - License plate sheltering detection system and detection method - Google Patents
License plate sheltering detection system and detection method Download PDFInfo
- Publication number
- CN102568202B CN102568202B CN201110440004.8A CN201110440004A CN102568202B CN 102568202 B CN102568202 B CN 102568202B CN 201110440004 A CN201110440004 A CN 201110440004A CN 102568202 B CN102568202 B CN 102568202B
- Authority
- CN
- China
- Prior art keywords
- license plate
- character
- vehicle
- sheltering
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Traffic Control Systems (AREA)
- Character Discrimination (AREA)
Abstract
The invention discloses a license plate sheltering detection system, which belongs to the field of intelligent transportation control and comprises a vehicle snap-shot location module (1), a processing module (3) and a license plate sheltering judgment module (2), wherein the vehicle snap-shot location module (1) is used for shooting vehicle images at detection positions and locating vehicle outlines in the snap-shot vehicle images, the processing module (3) is used for processing situations of spiteful sheltering of license plates, and the license plate sheltering judgment module (2) comprises a license plate location module (21), a license plate character analysis module (22) and a sheltering analysis module (23). The license plate location module (21) is used for locating license plate area in the snap-shot vehicle images, the license plate character analysis module (22) is used for determining appeared character positions and positions where deficiency characters may exist according to the appeared character positions in the license plate area, and the sheltering analysis module (23) judges whether spiteful sheltering exists or not according to textures of deficiency characters positions and enables judgment results to be sent to the processing module. The license plate sheltering detection system solves the technical problem that the existing detection system can not distinguish spiteful sheltering situations.
Description
Technical field
The invention belongs to intelligent traffic control system field, particularly a kind of license plate sheltering detection system and detection method.
Background technology
License plate recognition technology is application one of mode identification technology very widely in intelligent transportation field, the non-at-scene system for detecting regulation violation of the intelligent transportation industry overwhelming majority is (as electronic eye used for catching red light runner monitoring system at present, overspeed snapping system etc.) all realize automatic detection based on license plate recognition technology, automatically capture, automatically identify and automatically put in storage, be one of intelligentized technical foundation of traffic administration.
The technical foundation of license plate recognition technology is image processing techniques, character recognition technologies, the processing stage that license plate recognition technology being divided into four conventionally, i.e. and car plate location, Character segmentation, character recognition, car plate aftertreatment.Wherein:
Car plate locating module navigates to the car plate band of position from vehicle pictures, comprise modes such as using character stroke Gradient Features, car plate background color feature, textural characteristics, obtaining the most exactly, useful area is than (being car plate actual area and the ratio of candidate region area) maximum license plate candidate area, and filter as far as possible and reduce wrong candidate region number.
Character segmentation module refers to be analyzed license plate candidate area, and location character attempts using different car plate forms to locate and cut characters on license plate, chooses the most reasonably car plate form division methods, and successfully isolates independent license number character.
Character recognition module refers to the OCR(optical character identification adopting in area of pattern recognition) the single character picture of technology identification through obtaining after Character segmentation, obtain the recognition result of single character.
Car plate post-processing module refers to the monocase recognition result (comprising candidate's recognition result and corresponding confidence level) that utilizes character recognition module, according to car plate Rules Filtering and to be combined into confidence level the highest and meet the license number of characters on license plate rule criterion, conventional method is to adopt critical path method (CPM) to realize.By combination and the processing of above four modules, can obtain the number-plate number recognition result that confidence level is higher.
The license plate locating method that the license plate recognition technology using at present adopts is mostly based on vehicle license plate characteristic, in image, find the region with vehicle license plate characteristic as candidate region, reattempt and adopt the car plate rule of different-format to carry out cutting to this region, thereby be partitioned into independent characters on license plate, send into OCR character recognition module.Wherein most important vehicle license plate characteristic is character feature, can distinguish comparatively exactly other characters on license plate area and vehicle body, to reduce license plate area candidate blocks, improves locating speed.But the shortcoming of this method is: if car plate is blocked or partial occlusion, cause its character feature not obvious, often cause license plate area to be located unsuccessfully, finally occur the situation of None-identified.And the behavior that common malice is blocked car plate in daily life has exactly just in time reduced the character feature of car plate, as use the scraps of paper or CD to block several numerals (being generally 1～3) of car plate, may cause locating unsuccessfully, thereby last None-identified is to car plate.
In order to address the above problem, Chinese patent CN102156862A discloses a kind of anti-screening and has changed (block and alter) Vehicle License Plate Recognition System and recognition methods.First utilize car plate retroreflecting characteristics design a kind of active imaging and passive imaging system, realized the highlighted demonstration of license plate area in image, vehicle body, other background and screening change the low bright demonstration of material; Then, a kind of anti-screening of design changes licence plate recognition method, realized hiding and changed the original sentence to not and character recognition.But this Vehicle License Plate Recognition System is only used image processing method to cut apart characters on license plate, be judged to be to block as do not cut apart, after cutting apart successfully, binary conversion treatment is thought and is blocked when 0 pixel is greater than threshold value, otherwise thinks unshielding.But this system can not be distinguished maliciously and block with involuntary and block.,, even if car plate is located successfully on the other hand, lacked character also can to cause blocking the judgement of number not accurate enough owing to blocking on the one hand due to car plate profile is blocked and may causes car plate to be located unsuccessfully by the situation of front and back occlusion for car plate; And for some damaged dirty car plates, be also mistaken for deliberately and block owing to cannot being partitioned into characters on license plate.
It is relatively fixing that existing artificial malice is blocked the mode that characters on license plate adopts, and commonly with article such as CD, paper, plain cotton fabrics, latter several of car plate blocked.For common shielding mode and shelter, its textural characteristics is relatively to fix or regular.Therefore the situation that, applicant is blocked characters on license plate for above-mentioned malice has proposed the present invention.
Summary of the invention
For this reason, technical matters to be solved by this invention is that existing Vehicle License Plate Recognition System can not differentiate the problem that car plate malice is blocked, and then a kind of license plate sheltering detection system and detection method that can accurately detect that rear several the number-plate numbers are maliciously blocked is provided.
For solving the problems of the technologies described above, the invention discloses a kind of license plate sheltering detection system, it comprises, vehicle snapshot locating module, for capturing the vehicle image of monitoring location and navigating to vehicle ' s contour at the vehicle image of capturing; And processing module, for being blocked to car plate situation, malice processes; Also comprise license plate shading judge module, it comprises, car plate locating module, for navigating to license plate area at described vehicle ' s contour image; Characters on license plate analysis module, according to the character feature that appears in license plate area, determines and appears character position and disappearance character possibility location; Sheltering analysis module, described characters on license plate analysis module comprises and appears character position confirmation unit and lack character position judging unit; The described character position confirmation unit that appears navigates to and appears character position according to the textural characteristics application match search of character; Disappearance character position judging unit is inferred disappearance character possibility location according to the position and the standard car plate character format that appear character; Judge whether maliciously to block according to the texture of analyzing disappearance character position; Judged result is delivered to described processing module.
Vehicle snapshot locating module comprises: vehicle snapshot unit, for the vehicle image that travels monitoring location is captured; Vehicle locating unit, for navigating to vehicle ' s contour position by candid photograph to vehicle image.
Described car plate locating module navigates to license plate area according to the characters on license plate position appearing and the statistical value of car plate position in described vehicle ' s contour image.
Described characters on license plate analysis module comprises and appears character position confirmation unit and lack character position judging unit;
The described character position confirmation unit that appears navigates to and appears character position according to the textural characteristics application match search of character;
Disappearance character position judging unit infers that according to the position and the standard car plate character format that appear character disappearance character may location.
The described character number that appears is 3-5, and it at least comprises the twoth of car plate.
Described processing module comprises warning device, reports to the police for malice is blocked to car plate situation.
The detection method that the present invention discloses a kind of above-mentioned license plate sheltering detection system, it comprises the following steps,
A. vehicle snapshot locating module, to travelling after the vehicle image candid photograph of monitoring location, navigates to vehicle ' s contour in the vehicle image of capturing;
B. car plate locating module navigates to license plate area in described vehicle ' s contour image;
C. characters on license plate analysis module, according to the character feature that appears in license plate area, is determined and is appeared character position and disappearance character possibility location; Appearing character position confirmation unit navigates to and appears character position according to the textural characteristics application match search of character; Disappearance character position judging unit is inferred disappearance character possibility location according to the position and the standard car plate character format that appear character;
D. sheltering analysis module judges whether maliciously to block according to the textural characteristics of analyzing disappearance character position, and described processing module is processed maliciously blocking car plate according to judged result.
In step b, in described vehicle ' s contour image, navigate to license plate area by the car plate position that appears and the statistical value of car plate position.
Described in steps d, processing module is reported to the police to maliciously blocking car plate situation.
Technique scheme of the present invention has the following advantages compared to existing technology:
License plate sheltering detection system of the present invention navigates to license plate area according to the characters on license plate position appearing and the statistical value of car plate position in described vehicle ' s contour image, and it has avoided in prior art being realized and being located failed problem while locating by vehicle license plate characteristic.And, the present invention lacks the texture information at character position place by analysis, the textural characteristics of the common shelter of texture information and some classes is close, or the texture in multiple character disappearance region is more approaching, substantially can judge the behavior that this car plate may exist malice to block.Avoided in prior art, therefore, license plate sheltering detection system of the present invention is judging that malice is more intelligent than prior art aspect blocking.
Accompanying drawing explanation
For content of the present invention is more likely to be clearly understood, below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the system chart of license plate sheltering detection system.
Embodiment
Below with reference to accompanying drawing, use following examples to be further elaborated the present invention.
As shown in Figure 1, it comprises license plate sheltering detection system of the present invention,
Vehicle snapshot locating module 1, for capturing the vehicle image of monitoring location and navigating to vehicle ' s contour in candid photograph to vehicle image; Described vehicle snapshot locating module 1 comprises: vehicle snapshot unit 11 and vehicle locating unit 12.
Vehicle snapshot unit 11 is for to passing through at the video capture of the vehicle on road surface, monitoring point.The function of this unit is in order to obtain clear, complete vehicle image, so that carry out follow-up occlusion detection and analysis.The mechanism of vehicle being carried out to video capture has multiple, common mode comprises that ground induction coil triggering is captured, video analysis triggers and captures, radar triggers candid photograph etc., this functional module is the collecting unit that whole system is carried out the vehicle image of Treatment Analysis, be Data Source module, in all intelligent transportation systems based on license plate recognition technology, all have the similar functional module of use.In native system, this module is not had to special requirement, can directly realize the candid photograph of vehicle image by proven technique.
Vehicle locating unit 12 navigates to the outline position of vehicle in the vehicle image of capturing.The function of this unit is the particular location in order to navigate to target vehicle from the panoramic picture of large resolution, and this position is substantially take the appearance profile of vehicle as border, removes the impact of shade, occlusion etc.Use is similar to the algorithm for pattern recognition that face detects, and by adopting contour of the vehicle template (mainly comprising the template of the front face of car or vehicle rear) to search for coupling, in candid photograph image, navigates to vehicle location.There is multiple classic algorithm (as pyramid search) can realize this function at area of pattern recognition.In native system, this module is not proposed to special requirement, can directly realize the location of vehicle region by proven technique.
This license plate sheltering detection system also comprises license plate shading judge module 2, and license plate shading judge module 2 comprises,
Car plate locating module 21, described car plate locating module navigates to by described vehicle ' s contour the band of position that car plate hangs according to the statistical value of the car plate position appearing and car plate position.The function of this module is the particular location that navigates to comparatively exactly car plate, this position needs to demarcate comparatively accurately license plate area, should substantially be limited in the outer rim position of actual license plate, not allow to occur larger deviation or unnecessary region, also not allow more serious disappearance.Car plate locating module is the key modules in native system.What will solve due to native system is detection and the judgement of license plate shading, therefore for this module, can not utilize the complete texture information in characters on license plate region to realize the demarcation to car plate position, but the situation of blocking car plate due to malice in most of situation is all to adopt variety of way shield portions characters on license plate (as blocking last 1～3 of the number-plate number), therefore still can utilize the texture information of a remaining 3-5 partial character, simultaneously according to statistical law (as for most dillies, head and afterbody car plate are all suspended on centre position) auxiliary location of realizing license plate area.And be not suspended on the situation in centre position for car plate, and can not find the feature of similar characters on license plate in the region of statistical law, abandon using statistical law, directly determine the Probability Area of car plate according to the character position revealing.
Characters on license plate analysis module 22, according to the character feature that appears in license plate area, determines the position that may exist that appears character position and disappearance character; Described characters on license plate analysis module comprises and appears character position confirmation unit 221 and lack character position judging unit 222.
The described character position confirmation unit 221 that appears is for confirming the position of each character in license plate area.This unit is the locating area based on car plate locating module, searching character in region, and its main method is to utilize the textural characteristics of character, adopts the mode of match search to navigate to characters on license plate position.Match search mode refers to takes the mode such as template matches, connective region search to determine single characters on license plate in the Probability Area of car plate, block car plate behavior for malice, conventionally still having 3～5 characters appears, adopt searching for matching algorithm generally and can determine the particular location of the characters on license plate revealing in pattern-recognition, and confirm car plate form according to the character position revealing simultaneously.
Block car plate behavior for malice, modal shielding mode is blocking or latter two after the number-plate number, for the character revealing, character boundary, width can calculate mean value, character pitch also can obtain, by the character boundary and the position relationship that reveal, can determine car plate form.Due in car plate the 2nd, the character duration of 3 and the spacing between other differ larger, so as long as in the situation that the 2nd character exists, the position that appears character and disappearance character can both uniquely be determined.
As: last two while being blocked when characters on license plate, can obviously be greater than the unique definite car plate form of other intercharacter spacing by the 2nd, 3 intercharacter spacing; In the time that the position that is blocked is positioned at car plate centre position, for example the 3rd and the 5th is blocked, can by the 2nd with the 4th character between distance (it is than the large certain proportion of distance between common two) and the 4th and the 6th, the relation of the distance between the 6th and the 7th, can judge car plate form and position thereof.
By above-mentioned processing, according to car plate form and by appearing the characters on license plate position of character position confirmation unit confirmation, navigate to the regional location of " should exist " characters on license plate according to disappearance character position judging unit 222.This unit is mainly the position in order to locate the character being probably blocked, and is the position of inferring the character that may be blocked by the position of car plate form and known character.
Also comprise sheltering analysis module 23, described sheltering analysis module 23 judges whether maliciously to block car plate according to the texture analysis in disappearance region." should have character " that this module navigates to for disappearance character position judging unit 222 but texture analysis is carried out in the region of not detecting " really ", because the character that probably existence is blocked herein.Extract its textural characteristics, this feature is inevitable (if difference is very little, has been positioned as characters on license plate) greatly with character feature difference.Due to artificial malice, to block the mode that characters on license plate adopts relatively fixing, common are that CD blocks, paper blocks, plain cotton fabric blocks etc.For common shielding mode and shelter, its textural characteristics is relatively to fix or regular.The textural characteristics of shelter as common in detected textural characteristics in sheltering analysis module (these textural characteristics are all positioned at the region of " may have characters on license plate but character do not detected ") and some classes is close, or the texture in multiple character disappearances region is more approaching, substantially can judge the behavior that this car plate may exist malice to block.
This license plate sheltering detection system also comprises processing module 3, and described processing module 3 comprises warning device, reports to the police for malice is blocked to car plate situation.
The detection method that the present invention discloses the above-mentioned license plate sheltering detection system of application, it comprises the following steps,
A. to travelling after the vehicle image candid photograph of monitoring location, in the vehicle image of capturing, navigate to vehicle ' s contour;
B. in described vehicle ' s contour image, navigate to license plate area by the car plate position that appears and the statistical value of car plate position;
C. according to the character feature that appears in license plate area, determine and appear character position and disappearance character possibility location;
D. judge whether maliciously to block according to the textural characteristics of analyzing disappearance character position, described processing module is reported to the police to maliciously blocking car plate according to judged result.
Obviously, above-described embodiment is only for example is clearly described, and the not restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all embodiments.And the apparent variation of being extended out thus or variation are still among the protection domain in the invention.
Claims (8)
1. a license plate sheltering detection system, it comprises,
Vehicle snapshot locating module (1), for capturing the vehicle image of monitoring location and navigating to vehicle ' s contour at the vehicle image of capturing;
And processing module (3), for being blocked to car plate situation, malice processes; It is characterized in that:
Also comprise license plate shading judge module (2), license plate shading judge module (2) comprises,
Car plate locating module (21), for navigating to license plate area at described vehicle ' s contour image;
Characters on license plate analysis module (22), according to the character feature that appears in license plate area, determines and appears character position and disappearance character possibility location; Described characters on license plate analysis module (22) comprises and appears character position confirmation unit (221) and lack character position judging unit (222); The described character position confirmation unit (221) that appears navigates to and appears character position according to the textural characteristics application match search of character; Disappearance character position judging unit (222) is inferred disappearance character possibility location according to the position and the standard car plate character format that appear character;
Sheltering analysis module (23), judges whether maliciously to block according to the texture of analyzing disappearance character possibility location; Judged result is delivered to described processing module.
2. license plate sheltering detection system according to claim 1, is characterized in that:
Vehicle snapshot locating module (1) comprising:
Vehicle snapshot unit (11), for capturing the vehicle image that travels monitoring location;
Vehicle locating unit (12), for navigating to vehicle ' s contour position by candid photograph to vehicle image.
3. license plate sheltering detection system according to claim 1 and 2, is characterized in that:
Described car plate locating module (21) navigates to license plate area according to the characters on license plate position appearing and the statistical value of car plate position in described vehicle ' s contour image.
4. license plate sheltering detection system according to claim 1, is characterized in that:
The described character number that appears is 3-5, and it at least comprises the twoth of car plate.
5. license plate sheltering detection system according to claim 1, is characterized in that:
Described processing module (3) comprises warning device, reports to the police for malice is blocked to car plate situation.
6. application rights requires a detection method for the arbitrary described license plate sheltering detection system of 1-5, it is characterized in that: it comprises the following steps,
A. vehicle snapshot locating module (1), to travelling after the vehicle image candid photograph of monitoring location, navigates to vehicle ' s contour in the vehicle image of capturing;
B. car plate locating module (21) navigates to license plate area in described vehicle ' s contour image;
C. characters on license plate analysis module (22), according to the character feature that appears in license plate area, is determined and is appeared character position and disappearance character possibility location; Appearing character position confirmation unit (221) navigates to and appears character position according to the textural characteristics application match search of character; Disappearance character position judging unit (222) is inferred disappearance character possibility location according to the position and the standard car plate character format that appear character;
D. sheltering analysis module (23) judges whether maliciously to block according to the textural characteristics of analyzing disappearance character position, and described processing module (3) is processed maliciously blocking car plate according to judged result.
7. the detection method of license plate sheltering detection system according to claim 6, is characterized in that:
In step b, in described vehicle ' s contour image, navigate to license plate area by the car plate position that appears and the statistical value of car plate position.
8. the detection method of license plate sheltering detection system according to claim 6, is characterized in that:
Described in steps d, processing module is reported to the police to maliciously blocking car plate situation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110440004.8A CN102568202B (en) | 2011-12-23 | 2011-12-23 | License plate sheltering detection system and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110440004.8A CN102568202B (en) | 2011-12-23 | 2011-12-23 | License plate sheltering detection system and detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102568202A CN102568202A (en) | 2012-07-11 |
| CN102568202B true CN102568202B (en) | 2014-07-09 |
Family
ID=46413522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110440004.8A Active CN102568202B (en) | 2011-12-23 | 2011-12-23 | License plate sheltering detection system and detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102568202B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103021184B (en) * | 2012-12-26 | 2015-08-26 | 江苏大学 | Block auxiliary discriminating conduct and the system of car plate vehicle |
| JP6119374B2 (en) * | 2013-03-29 | 2017-04-26 | 沖電気工業株式会社 | Medium processing apparatus and medium transaction apparatus |
| CN104537841B (en) * | 2014-12-23 | 2017-01-25 | 上海博康智能信息技术有限公司 | Unlicensed vehicle violation detection method and detection system thereof |
| CN104951784B (en) * | 2015-06-03 | 2018-10-12 | 贵州警官职业学院 | A kind of vehicle is unlicensed and license plate shading real-time detection method |
| CN106203422B (en) * | 2016-06-28 | 2019-05-07 | 北京智芯原动科技有限公司 | License plate shading detection method and device based on hsv color space |
| CN106358019A (en) * | 2016-09-30 | 2017-01-25 | 北京中星微电子有限公司 | Intelligent monitoring method and system for license plate number coverage |
| CN107977596A (en) * | 2016-10-25 | 2018-05-01 | 杭州海康威视数字技术股份有限公司 | A kind of car plate state identification method and device |
| CN108021915A (en) * | 2017-12-25 | 2018-05-11 | 重庆冀繁科技发展有限公司 | The anti-detection method of license plate blocked |
| CN108091143A (en) * | 2017-12-25 | 2018-05-29 | 重庆冀繁科技发展有限公司 | Car plate detection system |
| CN109035797A (en) * | 2018-09-03 | 2018-12-18 | 科大国创软件股份有限公司 | A kind of screening board vehicle identification system and method based on Beidou location data |
| CN110020669A (en) * | 2019-03-04 | 2019-07-16 | 珠海亿智电子科技有限公司 | A kind of license plate classification method, system, terminal device and computer program |
| CN110399943B (en) * | 2019-07-11 | 2020-07-24 | 中国地质大学（北京） | Electronic license plate data decoding processing method and electronic license plate reading and writing equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102156862A (en) * | 2011-05-06 | 2011-08-17 | 杨星 | License plate recognition system and license plate recognition method preventing blocking and altering |
| CN202584427U (en) * | 2011-12-23 | 2012-12-05 | 北京易华录信息技术股份有限公司 | License plate sheltering detection system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008041017A (en) * | 2006-08-10 | 2008-02-21 | Sumitomo Electric Ind Ltd | Monitoring system and monitoring device |
-
2011
- 2011-12-23 CN CN201110440004.8A patent/CN102568202B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102156862A (en) * | 2011-05-06 | 2011-08-17 | 杨星 | License plate recognition system and license plate recognition method preventing blocking and altering |
| CN202584427U (en) * | 2011-12-23 | 2012-12-05 | 北京易华录信息技术股份有限公司 | License plate sheltering detection system |
Non-Patent Citations (4)
| Title |
|---|
| JP特开2008-41017A 2008.02.21 |
| 基于字符检测的车牌定位方法;贾瞾峰等;《计算机工程》;20100228;第36卷(第3期);第192-194页 * |
| 贾瞾峰等.基于字符检测的车牌定位方法.《计算机工程》.2010,第36卷(第3期),第192-194页. |
| 黎水平等.一种车牌字符位置侦测的新方法.《江南大学学报（自然科学版）》.2007,第6卷(第3期),第280-283页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102568202A (en) | 2012-07-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102568202B (en) | License plate sheltering detection system and detection method | |
| CN104036262B (en) | A kind of method and system of LPR car plates screening identification | |
| CN101383003B (en) | Real-time precise recognition method for vehicle number board | |
| Hung et al. | A real-time mobile vehicle license plate detection and recognition | |
| CN107180230B (en) | Universal license plate recognition method | |
| CN101833859A (en) | Self-triggering license plate identification method based on virtual coil | |
| CN102915433B (en) | Character combination-based license plate positioning and identifying method | |
| CN202584427U (en) | License plate sheltering detection system | |
| CN103186982A (en) | Intelligent access system for public security | |
| CN101877050A (en) | Automatic extracting method for characters on license plate | |
| CN104951784A (en) | Method of detecting absence and coverage of license plate in real time | |
| CN103077384A (en) | Method and system for positioning and recognizing vehicle logo | |
| CN106384513A (en) | Fake-licensed car capturing system and method based on intelligent traffic | |
| CN102902957A (en) | Video-stream-based automatic license plate recognition method | |
| CN102156862A (en) | License plate recognition system and license plate recognition method preventing blocking and altering | |
| CN103136528A (en) | Double-edge detection based vehicle license plate identification method | |
| CN101553852A (en) | System and method for detection of average speed of vehicles for traffic control | |
| CN105046966A (en) | System and method for automatically detecting illegal parking behaviors in drop-off areas | |
| CN105654734A (en) | Data processing method and device for vehicle violations | |
| CN103914682A (en) | Vehicle license plate recognition method and system | |
| CN112885108B (en) | Vehicle change detection method and system on parking space based on deep learning algorithm | |
| CN107358236A (en) | A kind of number-plate number identifying system and method based on camera device | |
| CN103699880A (en) | Internet of things-based traffic violation vehicle license plate detection and identification method | |
| CN204856897U (en) | It is detection device violating regulations in abscission zone territory that motor vehicle stops promptly | |
| CN108257152A (en) | A kind of road intrusion detection method and system based on video |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |