CN102567706A - Human face identification device and method - Google Patents
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Abstract
The invention provides a human face identification device and method, which belong to the field of biological characteristic identification. According to the invention, the human face identification device comprises a modulating light source, at least one camera and a processing unit, wherein the camera is used for respectively collecting human face image information under different wavebands of lights emitted by the modulating light source; and the processing unit is used for processing the human face image information collected by the camera and obtaining a human face identification result. By using the human face identification device and method, provided by the invention, the adaptive capacity of the human face identification device to lights, human face postures and expressions can be enhanced, the effective image information is accurately collected and the influence of the light interference on the human face identification is reduced.
Description
Technical field
The present invention relates to the living things feature recognition field, refer in particular to a kind of face identification device and method of interference against sunshine.
Background technology
Recognition of face is based on a kind of biometrics identification technology of technology such as computing machine, Image Processing and Pattern Recognition.In more than ten years in the past, along with recognition of face is used widely in commercial and law enforcement agency, for example form is identified, credit card identification, and security system, on-site supervision etc., face recognition technology has more and more obtained more concern.
Existing face recognition technology generally is based on facial image, promptly through the camera collection facial image, carries out the detection of people's face, human eye location and feature extraction then; And then compare with the template image in the ATL, make identification and differentiate.But, under the visible light environment, especially under the stronger situation of sunshine,, cause larger interference can for the collection of image because the surround lighting spectral range is very wide, produce the phenomenon of mistake identification or nonrecognition.Chinese patent ZL200820109477.3 discloses " a kind of face identification device ", comprises the recognition of face processing unit, display unit, first camera that is connected with said recognition of face processing unit, second camera that is connected with said display unit; Choose the legal candidate image of similarity height as final recognition result through the facial image of first camera and second camera collection.Chinese patent ZL200820146792.3 discloses " a kind of human face identification work-attendance checking machine ", comprises base and panel, and the main PCB plate is arranged on base, and said main PCB plate is provided with the camera of a high pixel CMOS infrared photography mode.High pixel CMOS infrared photography mode can realize the fast and little characteristics of False Rate of recognition of face speed.
The described face recognition technology of above scheme; Though can increase the precision of recognition of face and reduce False Rate; But do not go to design, thereby under the stronger situation of sunray, still can cause bigger interference the image of gathering from anti-natural light view of disturbances; And only simple employing increases the method for the number of camera resolution and camera, all can not reach the purpose that anti-high light disturbs.Thereby, how can accurately gather effective image information, reduce light and disturb influence to become a problem demanding prompt solution recognition of face.
Summary of the invention
The object of the present invention is to provide a kind of face identification device and method,, reduce light and disturb influence recognition of face with the effective image information of accurate collection.
Face identification device provided by the invention comprises:
Modulated light source is used to select to launch the light of different-waveband;
At least one camera is used under the light of the different-waveband that said modulated light source is launched, gathering human face image information respectively; And,
Processing unit is used for the human face image information of said camera collection is carried out Flame Image Process, and obtains face recognition result.
Further, this device also comprises filtering apparatus, places said camera front end, is used for the light outside the light place wave band that the filtering modulated light source sent, and the light that the modulated light source that people's face is reflected is sent is by said camera collection.
Further, said processing unit also is used in the cycle, controlling the light that said modulated light source is launched different-waveband chronologically at an IMAQ.
Further, said processing unit also is used in the typing stage of people's face information the human face image information that camera is gathered being carried out image co-registration under the light of different-waveband, and the fused images that obtains is also stored as benchmark image.
Further; Said processing unit carries out Flame Image Process to the human face image information of camera collection; And obtain face recognition result; Comprise: said processing unit with camera under different-waveband light collection in worksite to human face image information carry out image co-registration, and with the fused images that obtains with in advance the storage all benchmark images compare, with the immediate width of cloth benchmark image of comparison result as face recognition result; And/or, with camera under different-waveband light collection in worksite to human face image information respectively with in advance the storage all benchmark images compare, with the immediate width of cloth benchmark image of comparison result as face recognition result.
Further, said modulated light source is a modulated laser.
Further, said camera is CCD infrared camera or CMOS infrared camera.
Further, said modulated light source front end is provided with light adjusting device, and the light of the different-waveband that said modulated light source is sent becomes uniform light.
The present invention also provides a kind of face identification method, may further comprise the steps:
Under the light of the different-waveband that modulated light source is launched, camera is gathered human face image information respectively;
Human face image information to gathering is carried out Flame Image Process, and obtains face recognition result.
Further, this method also comprises: in the typing stage of people's face information, the human face image information that camera is gathered is carried out image co-registration under the light of different-waveband, the fused images that obtains is also stored as benchmark image.
Further; Said the human face image information that collects is carried out Flame Image Process; And obtain face recognition result; Comprise: with camera under different-waveband light collection in worksite to human face image information carry out image co-registration, with the fused images that obtains with in advance the storage all benchmark images compare, with the immediate width of cloth benchmark image of comparison result as face recognition result; And/or, with camera under different-waveband light collection in worksite to human face image information respectively with in advance the storage all benchmark images compare, with the immediate width of cloth benchmark image of comparison result as face recognition result.
Said modulated light source is the infrared light of the lower wave band of sunshine spectral irradiance and spectrum photon irradiance.
Face identification device of the present invention and method; Through under different-waveband light, gathering human face image information; And carry out image co-registration; Can strengthen the adaptive faculty of face identification device, accurately gather effective image information, reduce light and disturb influence recognition of face to light, human face posture and expression.
Description of drawings
Fig. 1 is the structural representation according to a kind of face identification device in the embodiment of the invention;
Fig. 2 is the structural representation according to another kind of face identification device in the embodiment of the invention;
Fig. 3 is the process flow diagram according to face identification method in the embodiments of the invention.
Embodiment
Specify embodiment of the present invention below in conjunction with accompanying drawing.
Fig. 1 is the structural representation according to the face identification device of an embodiment of the invention.
As shown in Figure 1, face identification device comprises: modulated light source 1, camera 5, filtering apparatus 4 and processing unit 6.Modulated light source 1 is used to launch the light of different-waveband.Camera 5 is used under the irradiation of the light of the different-waveband of modulated light source 1 emission, the image information of gathering people's face 3 respectively.Filtering apparatus 4 places the front end of camera 5, and the emission light that is used for filtering modulated light source 1 belongs to the light outside the wave band, and the light in the said wave band is gathered by camera 5.Processing unit 6 is electrically connected with camera 5 and modulated light source 1 respectively, is used for the human face image information that camera 5 is gathered is carried out Flame Image Process, and obtains face recognition result.Processing unit 6 also can be used for controlling modulated light source 1 and in the cycle, launches the light of different-waveband at an IMAQ chronologically, thereby makes camera under the light of different-waveband, gathers human face image information.
In the face identification device of this embodiment,, can reduce light and disturb influence recognition of face through gathering the human face image information of different-waveband.
We know, before face identification device carries out recognition of face, need carry out the typing work of people's face information in advance, so that follow-up recognition of face.Preferably, in the typing stage of people's face information, processing unit 6 also is used for the human face image information that camera 5 is gathered under different-waveband is carried out image co-registration, and the fused images that obtains is also stored as benchmark image.Like this, a large amount of benchmark images in the template image storehouse, have been stored, so that follow-up recognition of face corresponding to the different people face.
Preferably; In the recognition of face stage; The human face image information that 6 pairs of cameras of said processing unit 5 are gathered is carried out Flame Image Process, and obtains face recognition result, comprising: said processing unit 6 with camera 5 under different-waveband collection in worksite to human face image information carry out image co-registration; And with the fused images that obtains with in advance the storage all benchmark images compare, with the immediate width of cloth benchmark image of comparison result as face recognition result; And/or, with camera 5 under different-waveband collection in worksite to human face image information respectively with in advance the storage all benchmark images compare, with the immediate width of cloth benchmark image of comparison result as face recognition result.
Fig. 2 is the structural representation according to the face identification device of an embodiment of the invention.
As shown in Figure 2, the difference of face identification device of this embodiment and face identification device shown in Figure 1 is, has increased the quantity of camera, is provided with two cameras in the present embodiment, and here, the present invention does not limit camera quantity.As shown in Figure 2; Said face identification device comprises the first camera 5A and the second camera 5B; Under diverse location, different-waveband, gather human face image information respectively; Correspondingly, respectively two camera front ends be provided with the described embodiment of Fig. 1 in identical or similar two filtering apparatus 4A and 4B.
In the present embodiment; The first camera 5A and the second camera 5B can keep at a certain distance away in the horizontal direction; Perhaps keep at a certain distance away in vertical direction, also can two cameras be placed on other positions of being convenient to IMAQ according to factors such as placement condition, attractive in appearance, disguises.The first camera 5A and the second camera 5B can gather human face image information respectively under different-waveband; And the image information that collects is transferred to processing module 6 carries out Flame Image Process, can strengthen the adaptive faculty of face identification device to light, attitude and expression.
In face identification device illustrated in figures 1 and 2, be that effectively reducing sunshine disturbs the influence to recognition of face, preferably, the infrared light of the wave band that sunshine spectral irradiance and spectrum photon irradiance is lower is as modulated light source.According to standard sunshine spectral irradiance distribution table, the sunshine spectral irradiance about 825nm is 785.0 (W*m
-2* μ m
-1), spectrum photon irradiance is 3.255E+017 (cm
-2* s
-1* μ m
-1); 900nm left and right sides sunshine spectral irradiance is 745 (W*m
-2* μ m
-1), spectrum photon irradiance is 3.410E+017 (cm
-2* s
-1* μ m
-1).More than two wavelength lower with respect to the sunshine spectral irradiance and the spectrum photon irradiance of other wavelength, thereby can select centre wavelength for use is that the infrared light of 825nm or 900nm is as modulated light source.
Preferably, modulated light source 1 can be modulated laser.Advantage such as modulated laser has that monochromaticity is good, brightness is high, directivity and coherence are strong is compared common light emitting diode and is had better anti-light interference performance.
Preferably, camera 5, the first camera 5A, the second camera 5B are CCD infrared camera or CMOS infrared camera.
Preferably, filtering apparatus can be filter coating or optical filter, like the logical filter coating of band or cut-off light filtering films, can comprise the centre wavelength with modulated light source 1, and like 840nm, two passbands or more a plurality of passband that 880nm is corresponding, pass band width can reach 8nm.
Preferably, light adjusting device 2 can be set at modulated light source 1 front end, as depicted in figs. 1 and 2, be used for the light that said modulated light source 1 is sent is become uniform light.For example: light adjusting device 2 can be frosted glass, and the light that modulated light source 1 is launched carries out scattering, is radiated on people's face 3 thereby form uniform light.
Based on above-mentioned face identification device, the present invention also provides a kind of face identification method, and is as shown in Figure 3, may further comprise the steps:
Step 301: in the typing stage of people's face information, the human face image information that camera is gathered is carried out image co-registration under the light of different-waveband, the fused images that obtains is also stored as benchmark image;
Invent in first this step of hu; At the IMAQ in people's face information typing stage in the cycle; Processing unit control modulated light source is sent the light of different-waveband; And under different-waveband, gather human face image information respectively by camera, processing unit carries out image co-registration to the human face image information that collects, with the fused images that obtains as benchmark image and storage.
Step 302:, the human face image information that camera collects under the light of different-waveband is carried out Flame Image Process, and obtain face recognition result in the recognition of face stage.
In this step; At the IMAQ in recognition of face stage in the cycle; Said camera is carried out Flame Image Process in the human face image information that collects, and obtains face recognition result, comprising: with camera under different-waveband collection in worksite to human face image information carry out image co-registration; With the fused images that obtains with in advance the storage all benchmark images compare, with the immediate width of cloth benchmark image of comparison result as face recognition result; And/or, with camera under different-waveband collection in worksite to human face image information respectively with in advance the storage all benchmark images compare, with the immediate width of cloth benchmark image of comparison result as face recognition result.
The present invention passes through under different-waveband light, to gather human face image information, and carries out image co-registration, can strengthen the adaptive faculty of face identification device to light, human face posture and expression, reduces light and disturbs the influence to recognition of face.
In the above-described embodiment, for ease of understanding, examples more of the present invention only have been described.These embodiments are not limitations of the present invention, through these embodiments of suitable modification, principle of the present invention and thought also can be equal to or similarly embodiment implement.
Claims (12)
1. a face identification device is characterized in that, comprising:
Modulated light source is used to select to launch the light of different-waveband;
At least one camera is used under the light of the different-waveband that said modulated light source is launched, gathering human face image information respectively; And,
Processing unit is used for the human face image information of said camera collection is carried out Flame Image Process, and obtains face recognition result.
2. face identification device according to claim 1; It is characterized in that, also comprise filtering apparatus, place said camera front end; Be used for the light outside the light place wave band that the filtering modulated light source sent, the light that the modulated light source that people's face is reflected is sent is by said camera collection.
3. face identification device according to claim 1 and 2 is characterized in that, said processing unit also is used in the cycle, controlling the light that said modulated light source is launched different-waveband chronologically at an IMAQ.
4. face identification device according to claim 3; It is characterized in that said processing unit also is used for the typing stage in people's face information; Human face image information to camera is gathered under the light of different-waveband is carried out image co-registration, and the fused images that obtains is also stored as benchmark image.
5. face identification device according to claim 4; It is characterized in that; Said processing unit carries out Flame Image Process to the human face image information of camera collection, and obtains face recognition result, comprising: said processing unit with camera under different-waveband light collection in worksite to human face image information carry out image co-registration; And with the fused images that obtains with in advance the storage all benchmark images compare, with the immediate width of cloth benchmark image of comparison result as face recognition result; And/or, with camera under different-waveband light collection in worksite to human face image information respectively with in advance the storage all benchmark images compare, with the immediate width of cloth benchmark image of comparison result as face recognition result.
6. face identification device according to claim 1 is characterized in that, said modulated light source is a modulated laser.
7. face identification device according to claim 1 is characterized in that, said camera is CCD infrared camera or CMOS infrared camera.
8. face identification device according to claim 1 is characterized in that, said modulated light source front end is provided with light adjusting device, and the light of the different-waveband that said modulated light source is sent becomes uniform light.
9. a face identification method is characterized in that, may further comprise the steps:
Under the light of the different-waveband that modulated light source is launched, camera is gathered human face image information respectively;
Human face image information to gathering is carried out Flame Image Process, and obtains face recognition result.
10. face identification method according to claim 9; It is characterized in that; This method also comprises: in the typing stage of people's face information, the human face image information that camera is gathered is carried out image co-registration under the light of different-waveband, the fused images that obtains is also stored as benchmark image.
11. face identification method according to claim 10; It is characterized in that; Said the human face image information that collects is carried out Flame Image Process, and obtains face recognition result, comprising: with camera under different-waveband light collection in worksite to human face image information carry out image co-registration; With the fused images that obtains with in advance the storage all benchmark images compare, with the immediate width of cloth benchmark image of comparison result as face recognition result; And/or, with camera under different-waveband light collection in worksite to human face image information respectively with in advance the storage all benchmark images compare, with the immediate width of cloth benchmark image of comparison result as face recognition result.
12., it is characterized in that said modulated light source is the infrared light of the lower wave band of sunshine spectral irradiance and spectrum photon irradiance according to each described face identification method of claim 9 to 11.
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| CN2010106048383A CN102567706A (en) | 2010-12-24 | 2010-12-24 | Human face identification device and method |
| PCT/CN2011/084408 WO2012083860A1 (en) | 2010-12-24 | 2011-12-22 | Face recognition device and method |
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| CN105517680A (en) * | 2015-04-28 | 2016-04-20 | 北京旷视科技有限公司 | Device, system and method for recognizing human face, and computer program product |
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| CN106022321A (en) * | 2016-07-18 | 2016-10-12 | 北京红马传媒文化发展有限公司 | Collection device and face recognition device terminal |
| CN106446860A (en) * | 2016-10-10 | 2017-02-22 | 上海成业智能科技股份有限公司 | Method for clearly acquiring face recognition image under light interference condition |
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| CN111145244A (en) * | 2019-12-20 | 2020-05-12 | 万翼科技有限公司 | Room area acquisition method and related device |
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Application publication date: 20120711 |