CN104463113A - Face recognition method and device and access control system - Google Patents
Face recognition method and device and access control system Download PDFInfo
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- CN104463113A CN104463113A CN201410709389.7A CN201410709389A CN104463113A CN 104463113 A CN104463113 A CN 104463113A CN 201410709389 A CN201410709389 A CN 201410709389A CN 104463113 A CN104463113 A CN 104463113A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/16—Human faces, e.g. facial parts, sketches or expressions
- G06V40/174—Facial expression recognition
- G06V40/175—Static expression
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/20—Individual registration on entry or exit involving the use of a pass
- G07C9/22—Individual registration on entry or exit involving the use of a pass in combination with an identity check of the pass holder
- G07C9/25—Individual registration on entry or exit involving the use of a pass in combination with an identity check of the pass holder using biometric data, e.g. fingerprints, iris scans or voice recognition
- G07C9/253—Individual registration on entry or exit involving the use of a pass in combination with an identity check of the pass holder using biometric data, e.g. fingerprints, iris scans or voice recognition visually
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Abstract
The invention provides a face recognition method and device and an access control system. The method comprises the steps of acquiring near-infrared first video images regularly with a camera, conducting face recognition on the first video images, acquiring near-infrared second video images again if recognition succeeds, conducting expression recognition on the second video images to obtain corresponding expression information through analysis, judging whether the expression information is consistent with a registered expression preset in a database, and allowing a corresponding person to pass through if yes and not allowing the person to pass through otherwise. According to the face recognition method and device and the access control system, the video images are acquired through combination of a near-infrared active light source and the camera, the authenticity of image sources is guaranteed, and safety and accuracy of face recognition are improved by conducting expression recognition additionally.
Description
Technical field
The present invention relates to mode identification technology, specifically be a kind of face identification method, device and gate control system.
Background technology
Face recognition technology is a kind of biological identification technology carrying out identification based on the face feature information of people, mainly comprises Face datection and recognition of face two parts.At area of pattern recognition, face recognition technology development is comparatively rapid, has had corresponding practical application, as gate control system, attendance recorder, face login etc. based on recognition of face.The accuracy rate of current recognition of face, can reach more than 90%.
Current face recognition technology, the general visible ray that adopts carries out gathering and identifies, during actual motion, need in the face of visual problems such as different illumination conditions, visual angle, distance changes, these factors can affect the performance of facial image, make recognition performance unstable.In actual use, the photo using validated user may be there is, before being positioned over camera, also can be identified by, reach the situation of pretending to be validated user, make the security of gate control system can not get effective guarantee.For prior art if number of patent application is 201310751586.0, patent name is in the patent of invention of " a kind of face identification system ", disclose and directly adopt Face datection and locating module under visible light environment, carry out the collection of facial image, and then by process, feature extraction identifies facial image.This face identification method is rigorous not, and security is not high, is easy to, just by identifying, cannot ensure the accuracy of recognition of face and the security of gate inhibition.Therefore, be necessary to provide a kind of face identification method, device and gate control system, can be good at solving the problem.
Summary of the invention
Technical matters to be solved by this invention is: the invention provides a kind of face identification method, device and gate control system, and solving prior art easily affects recognition performance by environmental factor, and accurately cannot determine whether the deficiency of actual human head sculpture.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is:
A method for recognition of face, comprising:
Camera timing acquiring near infrared first video image;
Recognition of face is carried out to described first video image;
If be identified by, prompting user enters Expression Recognition, and gathers near infrared second video image;
Expression Recognition is carried out to described second video image, analyzes and obtain corresponding expression information;
Identify whether consistent described expression information expresses one's feelings with the registration preset in database;
If consistent, then by identifying, if inconsistent, then not by identifying.
Another technical scheme provided by the invention is:
A device for recognition of face, comprises near-infrared image acquisition module, face recognition module and Expression Recognition module;
Described near-infrared image acquisition module, for camera timing acquiring near infrared first video image; Gather near infrared second video image;
Described face recognition module, for carrying out recognition of face to described first video image;
If be identified by, prompting user enters Expression Recognition, and triggers near-infrared image acquisition module collection near infrared second video image;
Described Expression Recognition module, for carrying out Expression Recognition to described second video image, analyzing and obtaining corresponding expression information;
Identify whether consistent described expression information expresses one's feelings with the registration preset in database;
If consistent, then by identifying, if inconsistent, then not by identifying.
The present invention also provides another technical scheme:
A kind of gate control system, comprises above-mentioned face identification device.
Beneficial effect of the present invention is: the face recognition technology being different from prior art easily causes recognition performance unstable by the impact of environmental factor, and cannot accurate discrimination whether be actual human head sculpture information, make the security of the security system of application face recognition technology can not get the deficiency effectively ensured.The invention provides a kind of method of recognition of face, device and gate control system, near infrared first video image is obtained in conjunction with camera collection by positive near infrared light source, ensure that the video image got is actual human head sculpture information, but not the pictorial information usurped, thus source information accurate in guarantee face recognition technology, promote the accuracy of recognition result; By Expression Recognition process is set up on the basis of recognition of face, only have simultaneously by Expression Recognition, meet the user specified and register expression and just meet the requirements, the accuracy of further guarantee face recognition result, makes the security of gate control system be guaranteed.
Accompanying drawing explanation
Fig. 1 is the basic procedure block diagram of the method for a kind of recognition of face of the present invention;
Fig. 2 is the FB(flow block) of the method for a kind of recognition of face of the present invention;
Fig. 3 is the basic structure composition frame chart of the device of a kind of recognition of face of the present invention;
Fig. 4 is the structure composition frame chart of the device of a kind of recognition of face of the present invention.
Label declaration:
1, near-infrared image acquisition module; 2, face recognition module; 3, Expression Recognition module;
4, face tracking unit; 5, analytic unit; 6, unit is contrasted; 7, unit is returned.
Embodiment
By describing technology contents of the present invention in detail, realized object and effect, accompanying drawing is coordinated to be explained below in conjunction with embodiment.
The design of most critical of the present invention is: obtain video image by the induction bonded camera collection of near infrared ray light source, ensures image sources authenticity; Security and the accuracy of recognition of face is promoted further by setting up Expression Recognition.
Please refer to Fig. 1 to Fig. 4, the invention provides a kind of method of recognition of face, comprising:
Camera timing acquiring near infrared first video image;
Recognition of face is carried out to described first video image;
If be identified by, prompting user enters Expression Recognition, and gathers near infrared second video image;
Expression Recognition is carried out to described second video image, analyzes and obtain corresponding expression information;
Identify whether consistent described expression information expresses one's feelings with the registration preset in database;
If consistent, then by identifying, if inconsistent, then not by identifying.
It should be noted that, the face recognition technology that the invention solves prior art generally adopts visible ray to carry out gathering and identifying, the performance of facial image can be caused undesirable by the visual problems such as different illumination conditions, visual angle, distance change affect in actual motion, make the defects such as recognition performance instability.The present invention in non-visible, uses near-infrared image to carry out recognition of face, while can effectively suppressing ambient lighting to affect, can make again collection result by the impact of environment temperature etc., ensure follow-up accuracy of carrying out the video image information of recognition of face.
When this face recognition technology is applied to gate control system, allow to pass through gate control system to the personnel by identifying; First time recognition of face is not passed through or the unsanctioned personnel of second time Expression Recognition, does not then allow to pass through gate control system.The present invention overcomes before in actual use procedure, illegal molecule may directly use the photographic intelligence of validated user to be placed on camera equally, and camera can be identified by equally, makes illegal molecule successfully pretend to be validated user to be occurred by the situation of recognition access control system; Illegal molecule is avoided successfully to pretend to be validated user to be identified by gate inhibition by user picture.The present invention utilizes positive near infrared light source to the video heads picture collected before ensureing video camera for the real head image information of human body; Further, after subsequently through recognition of face, also need user to make the expression information of registration time institute typing, only having could eventually through identification after the match is successful.When the method for above-mentioned recognition of face is applied to gate control system, effectively can accomplish that taking precautions against illegal molecule usurps the possibility of image by gate inhibition by near infrared ray induction and the combination of Expression Recognition, greatly promote the accuracy of face recognition result, ensure the security of gate control system.
It should be noted that, just can prevent disabled user from utilizing the photo of validated user by being interpreted as of identifying for adopting positive near infrared light source: for positive near infrared light source, install infrared light emitting diodes additional, use the near-infrared band in infrared ray, fundamental purpose is the reflect near IR light intensity increasing testee, to strengthen detection range and lumen degree; Due to the paper that photo is a sheet of planar, area is little, and the near infrared light intensity of reflection is low, and the head portrait become through infrared light supply differs comparatively large with the head portrait in practical photograph, cannot pass through recognition of face.Preferably, when described first video image is carried out recognition of face and not by time, return and again again gather near infrared first video image, again carry out the face recognition process of the first video image, to improve the accuracy of recognition of face.
From foregoing description, beneficial effect of the present invention is: a kind of method that the invention provides recognition of face, near infrared first video image is obtained in conjunction with camera collection by positive near infrared light source, ensure that the video image got is actual human head sculpture information, but not the pictorial information usurped, thus source information accurate in guarantee face recognition technology, promote the accuracy of recognition result; By Expression Recognition process is set up on the basis of recognition of face, only have and pass through Expression Recognition simultaneously, meet the user specified to register expression and just meet the requirements, the accuracy of further guarantee face recognition result, makes the security of the security system of this face recognition technology of application be guaranteed.
Further, described " carrying out recognition of face to described first video image " specifically comprises:
Face tracking is carried out to described first video image, orients face scope;
Recognition of face is carried out to the video image within the scope of face, analyzes the characteristic information obtaining face;
The face characteristic information of validated user in described characteristic information and database is contrasted, draws comparing result.
Seen from the above description, by carrying out face tracking to the first video image, accurately orient face scope, directly directly can carry out recognition of face to the video image within the scope of face, save the time consumption in face recognition process, and greatly improve the accurate precision of recognition of face, improve recognition of face efficiency.
Further, comprise after described " face tracking is carried out to described first video image, orients face scope ":
If follow the trail of less than face, then returning retimes gathers near infrared first video image.
Further, described " carrying out recognition of face to described first video image " comprising:
Recognition of face is carried out to continuous n frame first video image, if the first video image being greater than n1 frame passes through to identify, is then identified by, described 0≤n1≤n;
Described " judging whether consistent described expression information expresses one's feelings with the registration preset in database " comprising:
Expression Recognition is carried out to continuous n frame second video image, if the second video image being greater than n2 frame is consistent with the registration facial expression image preset in database, is then identified by, described 0≤n2≤n.
Seen from the above description, only have the video image of specific frame number by recognition of face and Expression Recognition, eventually through face recognition process, the accuracy of recognition of face could be improve, ensure the security of the security system of this face recognition technology of application.
Further, the collection period of described camera is that every 500ms gathers frame near infrared first video image.
Another technical scheme provided by the invention is:
A device for recognition of face, comprises near-infrared image acquisition module 1, face recognition module 2 and Expression Recognition module 3;
Described near-infrared image acquisition module 1, for camera timing acquiring near infrared first video image; Gather near infrared second video image;
Described face recognition module 2, for carrying out recognition of face to described first video image;
If be identified by, prompting user enters Expression Recognition, and triggers near-infrared image acquisition module 1 and gather near infrared second video image;
Described Expression Recognition module 3, for carrying out Expression Recognition to described second video image, analyzing and obtaining corresponding expression information;
Identify whether consistent described expression information expresses one's feelings with the registration preset in database;
If consistent, then by identifying, if inconsistent, then not by identifying.
Preferably, after by the identification of face recognition module 2, also need the identification by Expression Recognition module 3, to carry out after entering Expression Recognition module 3 pointing out on screen or the mode such as voice message, require that user makes the particular emotion of user's typing when registering, and can not mention in prompting why registration expression plants expression, increases certain confidentiality.When the application of installation of above-mentioned recognition of face is in gate control system, the personnel by identifying are allowed to pass through gate control system; First time recognition of face is not passed through or the unsanctioned personnel of second time Expression Recognition, does not then allow to pass through gate control system.
From foregoing description, beneficial effect of the present invention is: the device that the invention provides a kind of recognition of face, near infrared first video image is obtained in conjunction with camera collection by near-infrared image acquisition module 1 positive near infrared light source, ensure that the video image got is actual human head sculpture information, but not the pictorial information usurped, thus source information accurate in guarantee face recognition technology, promote the accuracy of recognition result; Basis by the recognition of face of face recognition module 2 is set up Expression Recognition module 3 and carries out Expression Recognition process, only have and pass through Expression Recognition simultaneously, meet the user specified register expression just meet the requirements, the accuracy of further guarantee face recognition result, makes the security of the security system of this face identification device of application be guaranteed.
Further, described face recognition module 2 comprises face tracking unit 4, analytic unit 5 and contrast unit 6;
Described face tracking unit 4, for carrying out face tracking to described first video image, orients face scope;
Described analytic unit 5, for carrying out recognition of face to the video image within the scope of face, analyzes the characteristic information obtaining face;
Described contrast unit 6, for the face characteristic information of validated user in described characteristic information and database being contrasted, draws comparing result.
Further, described face recognition module 2 also comprises and returns unit 7, if follow the trail of less than face for described face tracking unit 4, then triggers near-infrared image acquisition module 1 and gathers near infrared first video image.
Further, described face recognition module 2, specifically for carrying out recognition of face to continuous n frame first video image, if the first video image being greater than n1 frame passes through to identify, is then identified by, described 0≤n1≤n;
Described Expression Recognition module 3, specifically for carrying out Expression Recognition to continuous n frame second video image, if the second video image being greater than n2 frame is consistent with the registration facial expression image preset in database, is then identified by, described 0≤n2≤n.
Further, the collection period of described near-infrared image acquisition module 1 is that every 500ms gathers frame near infrared first video image.
Another technical scheme provided by the invention is:
A kind of gate control system, comprises above-mentioned a kind of face identification device.If when the personnel be identified are by face identification device, then allow to pass through gate control system; To the personnel not by face identification device, then do not allow to pass through gate control system.
From foregoing description, beneficial effect of the present invention is: by a kind of gate control system of the present invention, adopts positive near infrared light source to obtain near infrared facial image in conjunction with camera collection and carries out recognition of face, promote the accuracy of recognition of face; Determine whether by gate control system by the result of recognition of face, more more convenient than gate control system of the prior art, and have more reliability, guarantee to only have validated user just by gate control system.
Please refer to figure, embodiments of the invention one are:
The present invention is used in the operating process in actual occasion;
User prepares to get back in the family of community, and he comes stairs port, near gate control system.Camera in the near infrared face identification device of gate control system, by active near infrared light, gathers first video image of user; After the recognition of face of the first video image, compare with the validated user data in database, if by identifying, then tentatively think validated user.Subsequently, gate control system plays voice message, the expression used when asking user to make registration, and after user makes expression, the camera near infrared face identification device, by active near infrared light, gathers second video image of user; Expression Recognition is carried out to described second video image, analyzes and obtain corresponding expression information; Gate control system carries out Expression Recognition to the expression information of the second video image, if by identifying, then by gate control system, enter indoor; If not by identifying, then cannot gate control system be passed through, cannot enter indoor.
In said process, if the recognition of face of the first video image, with the validated user comparing failure in database, or after user makes expression, the expression when expression recognized and registration is not mated, then think that this use is disabled user, gate control system does not perform the operation of opening gate.
In sum, the method for a kind of recognition of face provided by the invention, device and gate control system, can not only effectively prevent illegal molecule usurp validated user image information and by the error situation of recognition of face; Expression Recognition can be coordinated again to improve accuracy and the security of face recognition process; The present invention substantially increases security and the accuracy of face recognition technology, for gate control system provides safety guarantee.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalents utilizing instructions of the present invention and accompanying drawing content to do, or be directly or indirectly used in relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (11)
1. a method for recognition of face, is characterized in that, comprising:
Camera timing acquiring near infrared first video image;
Recognition of face is carried out to described first video image;
If be identified by, prompting user enters Expression Recognition, and gathers near infrared second video image;
Expression Recognition is carried out to described second video image, analyzes and obtain corresponding expression information;
Identify whether consistent described expression information expresses one's feelings with the registration preset in database;
If consistent, then by identifying, if inconsistent, then not by identifying.
2. the method for a kind of recognition of face according to claim 1, is characterized in that, described " carrying out recognition of face to described first video image " specifically comprises:
Face tracking is carried out to described first video image, orients face scope;
Recognition of face is carried out to the video image within the scope of face, analyzes the characteristic information obtaining face;
The face characteristic information of validated user in described characteristic information and database is contrasted, draws comparing result.
3. the method for a kind of recognition of face according to claim 2, is characterized in that, comprises after described " carry out face tracking to described first video image, orient face scope ":
If follow the trail of less than face, then returning retimes gathers near infrared first video image.
4. the method for a kind of recognition of face according to claim 1, is characterized in that, described " carrying out recognition of face to described first video image " comprising:
Recognition of face is carried out to continuous n frame first video image, if the first video image being greater than n1 frame passes through to identify, is then identified by, described 0≤n1≤n;
Described " judging whether consistent described expression information expresses one's feelings with the registration preset in database " comprising:
Expression Recognition is carried out to continuous n frame second video image, if the second video image being greater than n2 frame is consistent with the registration facial expression image preset in database, is then identified by, described 0≤n2≤n.
5. the method for a kind of recognition of face according to claim 1, is characterized in that, the collection period of described camera is that every 500ms gathers frame near infrared first video image.
6. a device for recognition of face, is characterized in that, comprises near-infrared image acquisition module, face recognition module and Expression Recognition module;
Described near-infrared image acquisition module, for camera timing acquiring near infrared first video image; Gather near infrared second video image;
Described face recognition module, for carrying out recognition of face to described first video image;
If be identified by, prompting user enters Expression Recognition, and triggers near-infrared image acquisition module and gather the second video image;
Described Expression Recognition module, for carrying out Expression Recognition to described second video image, analyzing and obtaining corresponding expression information;
Identify whether consistent described expression information expresses one's feelings with the registration preset in database;
If consistent, then by identifying, if inconsistent, then not by identifying.
7. the device of a kind of recognition of face according to claim 6, is characterized in that, described face recognition module comprises face tracking unit, analytic unit and contrast unit;
Described face tracking unit, for carrying out face tracking to described first video image, orients face scope;
Described analytic unit, for carrying out recognition of face to the video image within the scope of face, analyzes the characteristic information obtaining face;
Described contrast unit, for the face characteristic information of validated user in described characteristic information and database being contrasted, draws comparing result.
8. the device of a kind of recognition of face according to claim 7, it is characterized in that, described face recognition module also comprises and returns unit, if for described face tracking cell tracks less than face, then triggers near-infrared image acquisition module and gathers near infrared first video image.
9. the device of a kind of recognition of face according to claim 6, is characterized in that, described face recognition module, specifically for carrying out recognition of face to continuous n frame first video image, if the first video image being greater than n1 frame by identifying, is then identified by, described 0≤n1≤n;
Described Expression Recognition module, specifically for carrying out Expression Recognition to continuous n frame second video image, if the second video image being greater than n2 frame is consistent with the registration facial expression image preset in database, is then identified by, described 0≤n2≤n.
10. the device of a kind of recognition of face according to claim 5, is characterized in that, the collection period of described near-infrared image acquisition module is that every 500ms gathers frame near infrared first video image.
11. 1 kinds of gate control systems, is characterized in that, comprise a kind of face identification device of claim 6 ~ 9 described in any one.
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