CN201159818Y - Anti-interference imaging device with 940nm infrared light emitting diode active illumination - Google Patents
Anti-interference imaging device with 940nm infrared light emitting diode active illumination Download PDFInfo
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- CN201159818Y CN201159818Y CNU2008200761375U CN200820076137U CN201159818Y CN 201159818 Y CN201159818 Y CN 201159818Y CN U2008200761375 U CNU2008200761375 U CN U2008200761375U CN 200820076137 U CN200820076137 U CN 200820076137U CN 201159818 Y CN201159818 Y CN 201159818Y
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Abstract
The utility model provides an anti-interference imaging device with a 940nm infrared LBD active illumination, which relates to the technology fields of biometric recognition, security monitor and photography equipment. The device is mainly provided with an array imaging detector and a 940nm infrared LBD active illuminating structure; an optical filter which can make the 940nm infrared light to pass through is arranged in front of the array imaging detector. The utility model overcomes the disadvantages in the prior art. Using the 940nm infrared light to performance the active illumination greatly reduces the bad influence to the image by the environment light, especially the environment light at different time period; the obtained image has the advantages of high signal to noise ratio, good consistency, and high uniformity, definition and contrast; thereby the recognition accuracy and recognition ratio of the image is effectively increased. The utility model is unique in technology and can be widely used in the biometric recognition field such as face recognition and fingerprint recognition.
Description
Technical field
The utility model relates to bio-identification, security monitoring and photographic equipment technical field, specifically is the anti-interference imaging device that a kind of 940 nanometer infrarede emitting diodes initiatively throw light on.
Background technology
Fingerprint recognition, recognition of face, iris recognition technology have begun to be widely used in that gate inhibition, work attendance, bank cashier, locker, safety cabinet (chest), POS machine, computer log authentication, passport check are boarded, bank's prison drover's car, student status management, poll etc.These biological identification technologies are compared with template in the database and are judged the identity of identifying object by gathering the image of fingerprint, people's face and iris, and it refuses Key Performance Indicator sincere, that accuracy of system identification is system.
The image of the identifying object that biological recognition system is gathered has high signal to noise ratio (S/N ratio) and data consistency is to realize the prerequisite of good bio-identification performance.Wherein, signal to noise ratio (S/N ratio) reflection is the ratio of signal and surround lighting disturbance in the image, circuit dark current; And data consistency be meant difference constantly, under the different surround lighting, the identifying object view data difference of being gathered is little.
Good signal noise ratio (snr) of image is only arranged, and to refuse key index such as sincere, accuracy of system identification be very limited for improving biological recognition system.Biological recognition system, the recognition system of particularly noncontact images acquired (as face identification system), very responsive to the image consistance of identifying object.Because actual environment for use more complicated, being operated in different period daylight illumination and lighting all can great changes will take place, although visually do not observe notable difference, the view data of being gathered has produced very big-difference.For example, daylight oblique fire in morning enter and because of daylight dimness opened 1 of daylight lamp, register identifying object this moment and had higher identification accuracy at that time, but in another moment (as noon), day angle of light reduces to make scene illumination increase and because the bright daylight lamp of having closed illumination of light, although the imperceptible notable difference of human eye vision at this moment, but the data difference that the view data of the same identifying object that biological recognition system collects and morning gather is very serious, and the identifying object of original registration may can not discern or recognition accuracy reduces greatly.In order to make the identifying object image not be subjected to ambient light effects, improve the view data consistance, part biological identification enterprise has taked the method for visible illumination, also there is enterprise to adopt initiatively means of illumination of infrared light, suppress or end illuminating bundle surround lighting in addition with optical filter, the active illumination light that relies on recognition system itself to provide illuminates identifying object, compare the visible illumination method, the infrared illumination method is strong with disguise, stimulate little advantage to become main developing direction to the identifying object vision system.But general at present use 850nm diode lights is as the active lighting source, and its spectrum broad has big overlapping region with daylight lamp, incandescent lamp and sunlight, adds that the optical filter transmittance curve can not be very precipitous.Thereby surround lighting still has bigger energy to enter image detector, and conforming improvement is limited to this technical scheme to view data.
In addition, although environment daylight and houselights cause the view data of identifying object to change, but it is very even through the structure that body of wall repeatedly reflects formed illuminating bundle, and disturb the method for the illumination of taking the initiative in order to improve view data consistance, filtering environmental light, because recognition system mechanical dimensions restriction and can not be arranged in the active illuminating lamp very in the extensive area for the consideration of aesthetics, formed illuminating bundle is structural and directivity is very strong.Through verification experimental verification, have only identifying object is limited in and could realize on distance to a declared goal and the orientation discerning preferably.Too closely then light is too strong apart from main frame for identifying object, too far then light too a little less than, and move left and right also can cause alter a great deal identification difficulty of view data.
In sum, because the image of biological recognition system collection is changed by the ambient light interference data, and initiatively illuminating bundle is very inhomogeneous, and this contradiction is not well overcome at present, has limited its recognition performance and widespread use greatly.Contactless identification technology particularly, as recognition of face because this key index of identification accuracy is undesirable, unstable, people's face of registration in morning to noon just be not familiar with or the probability of admitting one's mistake very high, applying of this technology is subjected to very big restriction.
Summary of the invention
The purpose of this utility model provides the anti-interference imaging device that a kind of 940 nanometer infrarede emitting diodes initiatively throw light on, be characterized in: utilize 940 nanometer infrarede emitting diodes to carry out the active illumination, significantly reduced the adverse effect of the surround lighting of especially different periods of surround lighting to image, make the image that is obtained have signal to noise ratio (S/N ratio) height, high conformity, homogeneity height, sharpness height, contrast advantages of higher, thereby can effectively improve image recognition accuracy and discrimination.Can be widely used in field of biological recognition such as recognition of face, fingerprint recognition.
Main technical schemes of the present utility model is: the anti-interference imaging device that a kind of 940 nanometer infrarede emitting diodes initiatively throw light on, comprise the array image-forming detector, it is characterized in that being provided with the infrarede emitting diode active light structures that centre wavelength is 940 nanometers, the front of above-mentioned array image-forming detector is provided with the optical filter that can see through centre wavelength 940 nanometer infrared lights.
The optical filter that described energy sees through centre wavelength 940 nanometer infrared lights is contained in before the photosurface of array image-forming detector and the back of camera lens is good, also can be contained in the front of this camera lens.
Described centre wavelength 940 nanometer infrarede emitting diodes initiatively can be provided with one or more infrarede emitting diodes in the light structures.
It is good that the light source front of described centre wavelength 940 nanometer infrarede emitting diodes active light structures is provided with the beam divergence plate.
Described beam divergence plate is holographic scatter plate or outside surface or the inner transparent transparent substance that is provided with diffuse reflective structure.
Described outside surface or the inner transparent substance that is provided with diffuse reflective structure can be single or double frosted glass, or single or double hair organic glass, or single or double hair transparent plastic etc.
Described array image-forming detector formula is CCD or cmos detector etc.
Identification module, face phase recognition system, monitor or computing machine are connected to good the signal output part of described array image-forming detector mutually with face.
Its ultimate principle is: utilize 940 nanometer infrarede emitting diodes to carry out the active illumination, its spectrum and daylight lamp, incandescent lamp and sunlight overlapping region are less, thereby utilize optical filter effectively to suppress or entered image detector by surround lighting, significantly reduced the adverse effect of the surround lighting of especially different periods of surround lighting to image; The light beam that 940 nanometer infrarede emitting diodes send is through beam divergence plate scattering back lighting target, the target reflection light beam contains surround lighting and active illumination light, the filtering of process optical filter only keeps initiatively illumination light to the environment spectral component of array imaging detector sensitivity, pass through the array image-forming detector again, thereby obtain the signal to noise ratio (S/N ratio) height, uniform target image throws light on.
The beneficial effects of the utility model are: the deficiency that has overcome prior art preferably, better solved prior art technical barrier that existed since the midium or long term and unsolved always raising view data consistance and signal to noise ratio (S/N ratio), utilize 940 nanometer infrared lights to carry out the active illumination, significantly reduced the adverse effect of the surround lighting of especially different periods of surround lighting to image, make the image that is obtained have the signal to noise ratio (S/N ratio) height, high conformity, the homogeneity height, the sharpness height, the contrast advantages of higher, thereby can effectively improve image recognition accuracy and discrimination, technical have a uniqueness.Can be widely used in field of biological recognition such as recognition of face, fingerprint recognition.
Be described further below in conjunction with embodiment, but not as to qualification of the present utility model.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Among Fig. 1,1 is the beam divergence plate, and 2 is initiatively light structures of 940 nanometer infrarede emitting diodes, and 3 is (can see through centre wavelength 940 nanometer infrared lights) optical filter, and 4 is the array image-forming detector, and 41 is (array image-forming detector 4) camera lens.
Embodiment
Referring to Fig. 1, the anti-interference imaging device that this 940 nanometer infrarede emitting diode initiatively throws light on, comprise array image-forming detector 4, it is characterized in that (as being initiatively light structures 2 of the infrarede emitting diode (lamp) of 940nm ± 10nm) with power spectrum centre wavelength, centre wavelength 940 nanometer infrarede emitting diodes initiatively can be provided with one or more infrarede emitting diodes in the light structures to centre wavelength 940 nanometers.These centre wavelength 940 nanometer infrarede emitting diodes initiatively light source front of light structures 2 are provided with beam divergence plate 1, and light source can be established 1 or 2, or several (among the figure being 2) light emitting diode (lamp), and best and array image-forming detector 4 is made one; The optical filter 3 that can see through centre wavelength 940 nanometer infrared lights is contained in the preceding back that reaches camera lens of photosurface of array image-forming detector 4, and described energy is contained in the back of the camera lens of array image-forming detector 4 through the optical filter 3 of centre wavelength 940 nanometer infrared lights.Described beam divergence plate 1 is holographic scatter plate or outside surface or the inner transparent transparent substance that is provided with diffuse reflective structure.Described outside surface or the inner transparent substance that is provided with diffuse reflective structure can be single or double frosted glass.Described array image-forming detector 4 is CCD or cmos detector.The signal output part of described array image-forming detector 4 can with face identification module, face phase recognition system, monitor link to each other with computing machine (figure part omitted) mutually.
Claims (8)
1, the anti-interference imaging device that initiatively throws light on of a kind of 940 nanometer infrarede emitting diodes, comprise array image-forming detector (4), it is characterized in that being provided with initiatively light structures (2) of centre wavelength 940 nanometer infrarede emitting diodes, the front of above-mentioned array image-forming detector (4) is provided with the optical filter (3) that can see through centre wavelength 940 nanometer infrared lights.
2, the anti-interference imaging device that initiatively throws light on of 940 nanometer infrarede emitting diodes according to claim 1 is characterized in that optical filter (3) that described energy sees through centre wavelength 940 nanometer infrared lights is contained in before the photosurface of array image-forming detector (4) and the back or the front of camera lens.
3, the anti-interference imaging device that initiatively throws light on of 940 nanometer infrarede emitting diodes according to claim 1 is characterized in that described centre wavelength 940 nanometer infrarede emitting diodes initiatively can be provided with one or more infrarede emitting diodes in the light structures.
4, the anti-interference imaging device that initiatively throws light on of 940 nanometer infrarede emitting diodes according to claim 1 is characterized in that described centre wavelength 940 nanometer infrarede emitting diodes initiatively are provided with beam divergence plate (1) in the light source front of light structures (2).
5, the anti-interference imaging device that initiatively throws light on of 940 nanometer infrarede emitting diodes according to claim 4 is characterized in that described beam divergence plate (1) is holographic scatter plate or outside surface or the inner transparent substance that is provided with diffuse reflective structure.
6, the anti-interference imaging device that initiatively throws light on of 940 nanometer infrarede emitting diodes according to claim 5 is characterized in that described outside surface or the inner transparent substance that is provided with diffuse reflective structure are the transparent plastic of single or double frosted glass, hair organic glass or hacking.
7, the anti-interference imaging device that initiatively throws light on of 940 nanometer infrarede emitting diodes according to claim 1 is characterized in that described array image-forming detector (4) is CCD or cmos detector.
8, the anti-interference imaging device that initiatively throws light on according to claim 1,2,3,4,5,6 or 7 described 940 nanometer infrarede emitting diodes, identification module, face phase recognition system, monitor or computing machine link to each other the signal output part that it is characterized in that described array image-forming detector (4) mutually with face.
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2008200761375U CN201159818Y (en) | 2008-01-22 | 2008-01-22 | Anti-interference imaging device with 940nm infrared light emitting diode active illumination |
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| CNU2008200761375U CN201159818Y (en) | 2008-01-22 | 2008-01-22 | Anti-interference imaging device with 940nm infrared light emitting diode active illumination |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776487B (en) * | 2009-12-31 | 2011-05-18 | 华中科技大学 | Infrared focal plane non-uniformity fingerprint extraction and image correction method |
| CN103997610A (en) * | 2014-04-30 | 2014-08-20 | 辽宁卓异装备制造股份有限公司 | Night-vision camera device and focusing method thereof |
| CN109635539A (en) * | 2018-10-30 | 2019-04-16 | 华为技术有限公司 | A kind of face identification method and electronic equipment |
| CN110361909A (en) * | 2019-08-19 | 2019-10-22 | 深圳海森堡科技有限公司 | Integrated eyeglass and manufacturing method |
| CN111226361A (en) * | 2017-10-23 | 2020-06-02 | 亮锐控股有限公司 | VCSEL-based biometric identification device |
-
2008
- 2008-01-22 CN CNU2008200761375U patent/CN201159818Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776487B (en) * | 2009-12-31 | 2011-05-18 | 华中科技大学 | Infrared focal plane non-uniformity fingerprint extraction and image correction method |
| CN103997610A (en) * | 2014-04-30 | 2014-08-20 | 辽宁卓异装备制造股份有限公司 | Night-vision camera device and focusing method thereof |
| CN111226361A (en) * | 2017-10-23 | 2020-06-02 | 亮锐控股有限公司 | VCSEL-based biometric identification device |
| CN109635539A (en) * | 2018-10-30 | 2019-04-16 | 华为技术有限公司 | A kind of face identification method and electronic equipment |
| US12154373B2 (en) | 2018-10-30 | 2024-11-26 | Honor Device Co., Ltd. | Facial recognition method and electronic device |
| CN110361909A (en) * | 2019-08-19 | 2019-10-22 | 深圳海森堡科技有限公司 | Integrated eyeglass and manufacturing method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Jinyu Inventor before: Wang Jinzhi |
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| TR01 | Transfer of patent right |
Effective date of registration: 20090306 Address after: Shijiazhuang City, Xinhua Road Province, Hebei City No. 159 garden room A-6C, zip code: 050004 Patentee after: Wang Jinyu Address before: Photoelectric technology research institute, No. 97 Heping West Road, Hebei, Shijiazhuang 050003, China Patentee before: Wang Jinzhi |
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Owner name: WANG JINYU Free format text: FORMER OWNER: WANG JINZHI Effective date: 20090306 |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: WANG JINZHI TO: WANG JINYU |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081203 Termination date: 20100222 |