A kind of Vehicle License Plate Recognition System and methodTechnical field
The present invention relates to Car license recognition field, particularly relate to a kind of Vehicle License Plate Recognition System and method.
Background technology
The high definition Car license recognition all-in-one used in present parking lot can only carry out Car license recognition to a road video, so need to install high definition Car license recognition all-in-one respectively at EXIT and entrance, as shown in Figure 1, two high definition Car license recognition all-in-ones carry out Car license recognition to the vehicle sailing parking lot into the vehicle rolling parking lot away from respectively.
High definition Car license recognition all-in-one can also carry out Car license recognition except gathering image, so cost is higher, the licence plate recognition method cost that existing parking lot all arranges high definition Car license recognition all-in-one in exit and entry is higher, can only be lower to single channel Car license recognition efficiency.
Summary of the invention
In view of this, fundamental purpose of the present invention is to provide a kind of Vehicle License Plate Recognition System and method, can carry out Car license recognition to gateway, parking lot vehicle high efficiency, low cost.
For achieving the above object, the invention provides a kind of Vehicle License Plate Recognition System, comprising:
The web camera being arranged at Entrance and the Car license recognition all-in-one being arranged at EXIT;
The entrance automobile video frequency collected for gathering the automobile video frequency of Entrance, and is sent to described Car license recognition all-in-one by described web camera;
Described Car license recognition all-in-one is connected with described web camera, and for gathering the automobile video frequency of EXIT, the Car license recognition carrying out EXIT vehicle according to the outlet automobile video frequency collected obtains outlet vehicle license plate information; Entrance vehicle license plate information is obtained according to the Car license recognition that the described entrance automobile video frequency received carries out Entrance vehicle.
Preferably, described Car license recognition all-in-one comprises:
Image capture module and image processing module;
The described outlet automobile video frequency collected for gathering the automobile video frequency of EXIT, and is sent to described image processing module by described image capture module;
Described image processing module is all connected with described image capture module and described web camera, for receiving described entrance automobile video frequency that described web camera collects and the described outlet automobile video frequency that described image capture module collects, the described automobile video frequency received is decoded, and Car license recognition is carried out to decoded described automobile video frequency obtains license board information.
Preferably, described image processing module comprises:
ARM submodule, decoding sub-module and DSP submodule;
Described ARM submodule is all connected with described image capture module and described web camera, for gathering described entrance automobile video frequency and described outlet automobile video frequency, the described automobile video frequency collected is sent to described decoding sub-module;
Described decoding sub-module is connected with described ARM submodule, for decoding to the described automobile video frequency received, and decoded described automobile video frequency is sent to described DSP submodule;
Described DSP submodule is all connected with described decoding sub-module and described ARM submodule, for the described automobile video frequency after receipt decoding, carries out Car license recognition obtain license board information according to preset algorithm to decoded described automobile video frequency.
Preferably, described ARM submodule is also connected with administration module, described ARM submodule is also for being sent to described administration module by the described automobile video frequency collected, by described DSP submodule Car license recognition to described license board information be sent to described administration module, make described administration module carry out decoding display to described automobile video frequency, described license board information is shown.
Present invention also offers a kind of licence plate recognition method, comprising:
The web camera being arranged at Entrance gathers the automobile video frequency of Entrance, and the entrance automobile video frequency collected is sent to the Car license recognition all-in-one being arranged on EXIT;
Described Car license recognition all-in-one gathers the automobile video frequency of EXIT, and the Car license recognition carrying out EXIT vehicle according to the outlet automobile video frequency collected obtains outlet vehicle license plate information; Entrance vehicle license plate information is obtained according to the Car license recognition that the described entrance automobile video frequency received carries out Entrance vehicle.
Preferably, described Car license recognition all-in-one comprises image capture module and image processing module, described Car license recognition all-in-one gathers the automobile video frequency of EXIT, and the Car license recognition carrying out EXIT vehicle according to the outlet automobile video frequency collected obtains outlet vehicle license plate information; The Car license recognition carrying out Entrance vehicle according to the described entrance automobile video frequency received obtains entrance vehicle license plate information and specifically comprises:
Described image capture module gathers the automobile video frequency of EXIT, and the described outlet automobile video frequency collected is sent to described image processing module;
Described image processing module receives described entrance automobile video frequency that described web camera collects and the described outlet automobile video frequency that described image capture module collects, the described automobile video frequency received is decoded, and Car license recognition is carried out to decoded described automobile video frequency obtains license board information.
Preferably, described entrance automobile video frequency is sent to described Car license recognition all-in-one by RSTP agreement by described web camera, and described outlet automobile video frequency is sent to described image processing module by RSTP agreement by described image capture module.
Preferably, described image processing module comprises ARM submodule, decoding sub-module and DSP submodule; Described image processing module receives described entrance automobile video frequency that described web camera collects and the described outlet automobile video frequency that described image capture module collects, the described automobile video frequency received is decoded, and Car license recognition is carried out to decoded described automobile video frequency obtains license board information and specifically comprise:
Described ARM submodule gathers described entrance automobile video frequency and described outlet automobile video frequency, and the described automobile video frequency collected is sent to described decoding sub-module;
Described decoding sub-module is decoded to the described automobile video frequency received, and decoded described automobile video frequency is sent to described DSP submodule;
Described automobile video frequency after described DSP submodule receipt decoding, carries out Car license recognition according to preset algorithm to decoded described automobile video frequency and obtains license board information.
Preferably, described ARM submodule gathers described entrance automobile video frequency and described outlet automobile video frequency, after the described automobile video frequency collected is sent to described decoding sub-module, also comprise: the described automobile video frequency collected is sent to administration module by described ARM submodule makes it carry out decoding display to described automobile video frequency.
Preferably, described DSP submodule carries out after Car license recognition obtains license board information, also comprising to decoded described automobile video frequency according to preset algorithm: described ARM submodule by described DSP submodule Car license recognition to described license board information be sent to described administration module and make it show described license board information.
Preferably, described outlet automobile video frequency and described entrance automobile video frequency are H264 format video.
Apply a kind of Vehicle License Plate Recognition System provided by the invention and method, the web camera being arranged at Entrance gathers the automobile video frequency of Entrance, and the entrance automobile video frequency collected is sent to the Car license recognition all-in-one being arranged on EXIT; Described Car license recognition all-in-one gathers the automobile video frequency of EXIT, and the Car license recognition carrying out EXIT vehicle according to the outlet automobile video frequency collected obtains outlet vehicle license plate information; Entrance vehicle license plate information is obtained according to the Car license recognition that the described entrance automobile video frequency received carries out Entrance vehicle.Car license recognition all-in-one can gather video simultaneously and carry out Car license recognition according to the automobile video frequency collected, and can with external device communication, the vehicle identification of web camera collection is carried out Car license recognition, a Car license recognition all-in-one and web camera only can be used to realize exporting and the identification of entrance two-way car plate, Car license recognition can be carried out to gateway, parking lot vehicle low-cost high-efficiency.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 is the structural representation of existing Vehicle License Plate Recognition System;
Fig. 2 is the structural representation of a kind of Vehicle License Plate Recognition System embodiment one of the present invention;
Fig. 3 is the detailed construction schematic diagram of a kind of Vehicle License Plate Recognition System embodiment one of the present invention;
Fig. 4 is the structural representation of a kind of Vehicle License Plate Recognition System embodiment two of the present invention;
Fig. 5 is the detailed construction schematic diagram of a kind of Vehicle License Plate Recognition System embodiment two of the present invention;
Fig. 6 is the structural representation of a kind of Vehicle License Plate Recognition System embodiment three of the present invention;
Fig. 7 is the process flow diagram of a kind of licence plate recognition method embodiment four of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one:
The invention provides a kind of Vehicle License Plate Recognition System, Fig. 2 shows the structural representation of Vehicle License Plate Recognition System embodiment one of the present invention, comprising:
Be arranged at the web camera 101 of Entrance and the Car license recognition all-in-one 102 being arranged at EXIT;
The entrance automobile video frequency collected for gathering the automobile video frequency of Entrance, and is sent to described Car license recognition all-in-one 102 by described web camera 101;
Described Car license recognition all-in-one 102 is connected with described web camera 101, and for gathering the automobile video frequency of EXIT, the Car license recognition carrying out EXIT vehicle according to the outlet automobile video frequency collected obtains outlet vehicle license plate information; Entrance vehicle license plate information is obtained according to the Car license recognition that the described entrance automobile video frequency received carries out Entrance vehicle.
Also web camera 101 can be arranged at EXIT place in the present embodiment, Car license recognition all-in-one 102 is arranged at Entrance place, be not limited to above set-up mode, as long as have web camera and Car license recognition all-in-one respectively, as shown in Figure 3, for a kind of set-up mode of the present embodiment, high-definition network camera and high definition Car license recognition all-in-one are separately positioned on entrance and exit, record can be carried out after identifying car plate, in-let dimple machine or control of export machine control corresponding banister and open afterwards, clearance vehicle.
A kind of Vehicle License Plate Recognition System that application the present embodiment provides, the web camera being arranged at Entrance gathers the automobile video frequency of Entrance, and the entrance automobile video frequency collected is sent to the Car license recognition all-in-one being arranged on EXIT; Described Car license recognition all-in-one gathers the automobile video frequency of EXIT, and the Car license recognition carrying out EXIT vehicle according to the outlet automobile video frequency collected obtains outlet vehicle license plate information; Entrance vehicle license plate information is obtained according to the Car license recognition that the described entrance automobile video frequency received carries out Entrance vehicle.Car license recognition all-in-one can gather video simultaneously and carry out Car license recognition according to the automobile video frequency collected, and can with external device communication, the vehicle identification of web camera collection is carried out Car license recognition, a Car license recognition all-in-one and web camera only can be used to realize exporting and the identification of entrance two-way car plate, Car license recognition can be carried out to gateway, parking lot vehicle low-cost high-efficiency.
Embodiment two:
Particularly, as shown in Figure 4, described in Vehicle License Plate Recognition System embodiment two of the present invention, Car license recognition all-in-one 102 comprises:
Image capture module 201 and image processing module 202;
The described outlet automobile video frequency collected for gathering the automobile video frequency of EXIT, and is sent to described image processing module 202 by described image capture module 201;
Described image processing module 202 is all connected with described image capture module 201 and described web camera 101, for receiving described entrance automobile video frequency that described web camera 101 collects and the described outlet automobile video frequency that described image capture module 201 collects, the described automobile video frequency received is decoded, and Car license recognition is carried out to decoded described automobile video frequency obtains license board information.
As shown in Figure 5, above modules A is image capture module, can be web camera module, by gather video by Internet Transmission to module B;
Module B is image processing module, can be and be integrated with video decode core, the module of the multinuclear high-performance processor of DSP core and ARM core etc., can intercom mutually between each core, associated treatment, also can have double netcard function, namely network service can be carried out with modules A by a network interface, carry out network service by another network interface and external unit such as switch simultaneously, namely DM814x chip as TI company has this function, wherein video decode is endorsed and is decoded respectively to multichannel H264 video flowing, DSP endorses operation Recognition Algorithm of License Plate, ARM core has double netcard function, and can corresponding peripheral hardware be controlled.
Embodiment three:
Particularly, as shown in Figure 6, described in Vehicle License Plate Recognition System embodiment two of the present invention, image processing module 202 comprises:
ARM submodule 301, decoding sub-module 302 and DSP submodule 303;
Described ARM submodule 301 is all connected with described image capture module 201 and described web camera 101, for gathering described entrance automobile video frequency and described outlet automobile video frequency, the described automobile video frequency collected is sent to described decoding sub-module 302;
Described decoding sub-module 302 is connected with described ARM submodule 301, for decoding to the described automobile video frequency received, and decoded described automobile video frequency is sent to described DSP submodule 303;
Described DSP submodule 303 is all connected with described decoding sub-module 302 and described ARM submodule 301, for the described automobile video frequency after receipt decoding, carries out Car license recognition obtain license board information according to preset algorithm to decoded described automobile video frequency;
In the present embodiment, described ARM submodule 301 is also connected with administration module, administration module can be the host computer of administrative center, the described automobile video frequency collected is sent to described administration module by described ARM submodule 301, by described DSP submodule 303 Car license recognition to described license board information be sent to described administration module, make described administration module carry out decoding display to described automobile video frequency, described license board information is shown.
Embodiment four:
Present invention also offers a kind of licence plate recognition method, comprising:
Step 1: the web camera being arranged at Entrance gathers the automobile video frequency of Entrance, and the entrance automobile video frequency collected is sent to the Car license recognition all-in-one being arranged on EXIT;
Step 2: described Car license recognition all-in-one gathers the automobile video frequency of EXIT, the Car license recognition carrying out EXIT vehicle according to the outlet automobile video frequency collected obtains outlet vehicle license plate information; Entrance vehicle license plate information is obtained according to the Car license recognition that the described entrance automobile video frequency received carries out Entrance vehicle.
Particularly, described Car license recognition all-in-one comprises image capture module and image processing module, and as shown in Figure 6, modules A is image capture module, can be web camera module, and module B is image processing module, and above-mentioned steps is specially:
Steps A: the modules A of the Car license recognition all-in-one in exit sends by RTSP agreement the video collected to module B, the high-definition network camera of porch also sends by RTSP agreement the video collected to module B;
Two sub-process namings are gather subprocess 1 and gather subprocess 2 by step B: the ARM core in module B runs two corresponding video acquisition subprocesss (as the capture program ffplay etc. that increases income) here;
Gather the H264 video flowing that subprocess 1 is sent by the modules A that RTSP agreement receives Car license recognition all-in-one inside, gather the H264 video flowing that subprocess 2 is sent by the high-definition network camera that RTSP agreement receives porch, then 2 road H264 video streamings are held by the mode of interprocess communication the host process run by two subprocesss to ARM, this two-way H264 dynamic image distribution is decoded toward video decode core by host process, also this two-way H264 video flowing is sent to the PC computer of sentry box workstation by Transmission Control Protocol, for PC computer decoding display vehicle discrepancy video simultaneously;
Step C: video decode core by after this two-way H264 decoding video stream, then is transferred to the DSP core in module B;
Step D: the DSP core in module B runs corresponding Car license recognition analytical algorithm, carries out Car license recognition analysis to this two-path video.Then the recognition result of this two-path video is sent to the ARM core in modules A;
Step e: the recognition result of this two-path video is carried out the display of license board information by ARM core again by the PC computer that Transmission Control Protocol sends administrative center to.
Now, the PC computer of sentry box workstation then can see corresponding license board information in the two-path video of Entrance and outlet and video.
A kind of licence plate recognition method that application the present embodiment provides, the web camera being arranged at Entrance gathers the automobile video frequency of Entrance, and the entrance automobile video frequency collected is sent to the Car license recognition all-in-one being arranged on EXIT; Described Car license recognition all-in-one gathers the automobile video frequency of EXIT, and the Car license recognition carrying out EXIT vehicle according to the outlet automobile video frequency collected obtains outlet vehicle license plate information; Entrance vehicle license plate information is obtained according to the Car license recognition that the described entrance automobile video frequency received carries out Entrance vehicle.Car license recognition all-in-one can gather video simultaneously and carry out Car license recognition according to the automobile video frequency collected, and can with external device communication, the vehicle identification of web camera collection is carried out Car license recognition, a Car license recognition all-in-one and web camera only can be used to realize exporting and the identification of entrance two-way car plate, Car license recognition can be carried out to gateway, parking lot vehicle low-cost high-efficiency.
It should be noted that, each embodiment in this instructions all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar part mutually see.
Finally, also it should be noted that, in this article, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
Be described in detail system and method provided by the present invention above, apply specific case herein and set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.