CN201084200Y - An embedded face-identification entrance guard attendance-checking machine - Google Patents
An embedded face-identification entrance guard attendance-checking machine Download PDFInfo
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- CN201084200Y CN201084200Y CNU2007201736978U CN200720173697U CN201084200Y CN 201084200 Y CN201084200 Y CN 201084200Y CN U2007201736978 U CNU2007201736978 U CN U2007201736978U CN 200720173697 U CN200720173697 U CN 200720173697U CN 201084200 Y CN201084200 Y CN 201084200Y
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Abstract
The utility model relates to an embedded face identification attendance check machine, belonging to the identification field of biometrics. The utility model is characterized in that: an embedded digital signal processor DSP is adopted as a main processor of the attendance check machine, the utility model also comprises a CMOS infrared image pick-up module group for acquiring face image, an infrared emitting diode used as an invariable light source, a wiegand interface and a USB interface; an infrared narrow band optical filter is arranged in the front of the CMOS infrared image pick-up module group shot. The bandwidth of the infrared narrow band optical filter allows only the adjacent infrared lights emitted by the infrared emitting diode to pass through, and masks the visible lights and other infrared lights of the sun light. The DSP processor generates standard attendance check wiegand signal by IO port simulating for attendance check standard output controlling. The utility model has the advantages of perfect salvation of the long-existing problem that visible light affects face identification, original convenience, non-contact character, good stability, and widely usage in attendance check field for the adoption of infrared narrow band optical filter and infrared emitting diode group.
Description
Technical field
The utility model belongs to the living things feature recognition field, relates to a kind of embedded human face recognition gate prohibition attendance-recording machine, particularly relates to a kind of gate prohibition attendance-recording machine that adopts the infrared face recognition technology of infrared narrow band filter.
Background technology
Access control system is widespread use in the world, and the product application type develops into contactless from contact, develops into living things feature recognition from ID card, IC-card, from single gate inhibition's function development to the gate inhibition with the work attendance dual-use function.The equipment with living things feature recognition, access control and attendance dual-use function of mass selling in the market, it mainly is fingerprint recognition access control system attendance recorder product, but because there is inborn decortication in fingerprint, does wet finger, refuses publishing defectives such as rate height, fingerprint die, and directly contact health concerns and the inconvenience of bringing, make the appearance of human face recognition gate prohibition attendance-recording machine become inevitable development trend.
Recognition of face is compared with fingerprint recognition as a big focus in current living things feature recognition field, and remarkable advantages such as intuitive, convenience, untouchable, friendly, user's acceptance height are arranged.But the operand of face recognition algorithms is far longer than algorithm for recognizing fingerprint, and therefore, the inline process type that generally is confined to the PC platform is used, for example " face image identification entrance guard and the attendance checking system " of Granted publication CN1110767C.In addition, studies show that the feature difference of same individual under different light rays, even greater than at the feature difference between the different people under the same light, therefore, based on the face recognition technology of visible images, the influence of ambient light there is the defective that is difficult to overcome, different when registering of the ambient light when identification, recognition performance has bigger decline, can't satisfy the requirement that actual product is used.Just be based on this reason, the recognition of face access control and attendance is confined to import job number earlier or swipe the card at present, carries out recognition of face in 1: 1 comparison again, and the convenience of its living things feature recognition product itself is had a greatly reduced quality.
The utility model content
Technical problem to be solved in the utility model is to break away from the PC platform, the real-time recognition of face of realization on embedded platform, and the stability of underwriter's face recognition performance, realization 1: N comparison.
The technical scheme in the invention for solving the above technical problem is, a kind of embedded human face gate prohibition attendance-recording machine comprises synchronous dynamic random access memory SDRAM, flash memory FLASH, LCDs, button, power supply, clock chip and hummer, adopting embedded dsp DSP is primary processor, also comprises CMOS infrared photography module, the infrarede emitting diode group as constant light source, Wei root interface and the USB interface of catching facial image; Before the camera lens of CMOS infrared photography module, infrared narrow band filter is installed.Dsp processor is connected with CMOS infrared photography module with communication port I2C by video port VP, connect LCDs, synchronous dynamic random access memory SDRAM, flash memory FLASH and USB interface chip respectively by external bus, connect infrarede emitting diode group, button and hummer respectively by the IO mouth, by IO mouth simulation gate inhibition standard Wiegand signal, connect clock chip by serial ports.
The beneficial effects of the utility model are, on the DSP embedded platform, adopt CMOS infrared photography module, infrarede emitting diode group, thoroughly eliminate the influence of luminous ray in traditional recognition of face, realize 1: N comparison, the stability and the reliability of underwriter's face recognition performance.The utility model cost, volume, power consumption and system stability are much higher than the people's face gate prohibition attendance-recording machine based on the PC platform, compare with present fingerprint recognition gate prohibition attendance-recording machine, and intuitive, untouchable, security of system and robustness promote greatly.
Description of drawings
Below in conjunction with drawings and embodiments the utility model is further specified.
Fig. 1 is a hardware block diagram of the present utility model.
Fig. 2 is the spectrum transmitting rate curve of infrared narrow band filter of the present utility model.
Fig. 3 is the assembling synoptic diagram of infrared narrow band filter of the present utility model and camera module group lens.
Fig. 4 is a menu function module map of the present utility model.
Fig. 5 is the FB(flow block) that the utility model carries out recognition of face.
Fig. 6 is the system chart that the utility model inserts gate control system.
Description of reference numerals:
The 1-image sensor chip;
2-common lens group;
The 3-infrared narrow band filter.
Embodiment
Fig. 1 is a hardware block diagram of the present utility model.The utility model is primary processor with the digital signal processor DSP, connect synchronous dynamic random access memory SDRAM, flash memory FLASH, LCDs, USB interface chip by external bus, and by IO mouth connection infraluminescence diode group, button and hummer, DataO, Datal by IO mouth simulation gate inhibition standard Wiegand signal, connect the clock chip that has backup battery by serial ports, for system provides real-time clock.Present embodiment is primary processor with TMS320DM642, and highest point reason ability can reach 4800MIPS (MIPS), and its video port VP can directly connect CMOS infrared photography module, carries out the facial image of black and white gray scale and catches.
FLASH is used for stored programme and fixed data, and SDRAM is used for working procedure, and the storage ephemeral data, liquid crystal display screen display menu, image and operation information.Adopting resolution in the present embodiment is 240 * 320,2.4 inches LCDs.
The infrarede emitting diode group provides fixed light source, as fixed light source, thoroughly solve the light problem with the infrarede emitting diode group, the illumination consistance the when registration of underwriter's face, recognition of face, and not influenced by any of luminous ray, even all can normally stably work at night.Present embodiment adopts 48 infrarede emitting diodes that centre wavelength is 850nm.
The USB interface chip is realized the usb host function, can external common U disk, by importing and exporting of disk file, realize the exchange of user data and attendance record.Present embodiment adopts CH375 as the usb host interface chip.
Present embodiment adopts in conventional gate inhibition's interface+9V～+ the 12V direct supply imports as additional power source, provides various power supplys through power circuit for system.By the Wiegand signal of IO mouth simulation generation standard, control output as the gate inhibition.
Fig. 2 is the spectrum transmitting rate curve of the infrared narrow band filter of the utility model special use.The wavelength of visible light scope approximately is 400-700nm, and 700-1200nm approximately is near infrared light (near infrared) zone, we should shield the visible light in the sunshine, shield the infrared light in the sunshine again, the near infrared light that is sent by the infrarede emitting diode group only, therefore, this transmittance curve is an arrowband curve.The centre wavelength of the arrowband curve of present embodiment is 850nm, and is corresponding with the centre wavelength of infrarede emitting diode, and bandwidth is 15nm, and the inhibition degree of depth of visible light reaches 10E-6, and the inhibition degree of depth of infrared part reaches 10E-3.After tested, satisfy demand fully in indoor application.If under outdoor sunshine direct projection, use, also need further to strengthen the inhibition degree of depth and reach 10E-9, but the centre wavelength percent of pass also can reduce greatly like this, need to strengthen the power of infrarede emitting diode group, but principle is the same.
Fig. 3 is the assembling synoptic diagram of infrared narrow band filter of the present utility model and camera module group lens.The principle of work of infrared photography module and common shooting module are basic identical, all be to utilize light to impinge upon on the object reflection through eyeglass imaging to the image sensor chip, difference is, common shooting module is to intercept infrared ray, the permission luminous ray passes through, and the infrared photography module is the block visible light line, allows infrared ray to pass through.Infrared photography module described in the utility model comprises common lens group 2 and image sensor chip 1, and common lens group front is equipped with an infrared narrow band filter 3.Adopt the infrared photography module to make the shooting of people's face not rely on visible light, the light that has solved in traditional recognition of face influences problem.Present embodiment adopts the CMOS infrared photography module of 300,000 pixels.
Fig. 4 is a menu function module map of the present utility model.After the administrator's password checking, the keeper can carry out the registered user, revises the user, deletes user, system's setting, empty to write down and communicate by letter with USB flash disk.Wherein, system's setting comprises time setting, date setting and gate setting, and USB flash disk communication comprises the importing user, derives user, derived record.A user gets 10 people's face template datas in the present embodiment, satisfies the demand of colourful attitude, compares fingerprint access control, and non-contacting, automatic recognition of face speed improves greatly, reaches for 8 frame/seconds, can effectively solve the queuing phenomena in rush hour on and off duty.
Fig. 5 carries out the FB(flow block) of recognition of face for the utility model.Recognition of face is the utility model most principal work state, at first by CMOS infrared photography module, under fixing infrared light supply, catches image, carries out the detection of people's face; If detect by people's face, then carry out human eye location, and be benchmark, the intercepting facial image with people's eyes, carry out normalized, extract feature, compare, if the highest similarity that obtains surpasses thresholding with the user template of this feature and storage, then pass through, the Wiegand signal of output relative users is realized opening the door by access controller, and the storage attendance record.If can not pass through, then restart to carry out recognition of face.
Fig. 6 inserts the system chart of gate control system for the utility model.The utility model is supported and the compatible access controller of selling in the market fully.This device is obtained power work from access controller, and connects access controller by Wiegand signal, discerns successfully, and then access controller control electric mortise lock or electromagnetic lock are realized opening the door.Door open button in the gate connects access controller, is implemented in opening the door of going out in the door.Import and export file by common U disk, people's face attendance management software on PC and entrance guard management software realize strengthening management function.
The utility model adopts infrared narrow band filter, infrarede emitting diode group, and the visible light that has thoroughly solved long-term puzzlement recognition of face influences problem, and the high stable reliability of infrared face identification has realized 1: the N comparison.On this basis, realized real-time recognition of face, greatly reduced cost, promoted system stability at the DSP embedded platform.The utlity model has unique convenience, untouchable and stable, can be widely applied to access control and attendance field and safety-security area.
Claims (2)
1. embedded human face recognition gate prohibition attendance-recording machine, comprise synchronous dynamic random access memory SDRAM, flash memory FLASH, LCDs, button, power supply, clock chip and hummer, it is characterized in that, adopting embedded dsp DSP is primary processor, also comprises CMOS infrared photography module, the infrarede emitting diode group as constant light source, Wei root interface and the USB interface of catching facial image; Before the camera lens of CMOS infrared photography module infrared narrow band filter is installed.
2. embedded human face recognition gate prohibition attendance-recording machine according to claim 1, it is characterized in that, dsp processor is connected with CMOS infrared photography module with communication port I2C by video port VP, connect LCDs, synchronous dynamic random access memory SDRAM, flash memory FLASH and USB interface chip respectively by external bus, connect infrarede emitting diode group, button and hummer respectively by the IO mouth, by IO mouth simulation gate inhibition standard Wiegand signal, connect clock chip by serial ports.
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2007201736978U CN201084200Y (en) | 2007-10-19 | 2007-10-19 | An embedded face-identification entrance guard attendance-checking machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2007201736978U CN201084200Y (en) | 2007-10-19 | 2007-10-19 | An embedded face-identification entrance guard attendance-checking machine |
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| CN201084200Y true CN201084200Y (en) | 2008-07-09 |
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| CNU2007201736978U Expired - Fee Related CN201084200Y (en) | 2007-10-19 | 2007-10-19 | An embedded face-identification entrance guard attendance-checking machine |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101685554A (en) * | 2008-09-25 | 2010-03-31 | 银河港(北京)技术有限公司 | Human face identification work-attendance checking method and system based on network |
| CN101414387B (en) * | 2007-10-19 | 2010-06-02 | 汉王科技股份有限公司 | Embedded human face recognition gate prohibition attendance-recording machine |
| CN102789570A (en) * | 2011-05-19 | 2012-11-21 | 苏州盛塔斯电子科技有限公司 | System for recognizing faces |
| CN102789571A (en) * | 2011-05-19 | 2012-11-21 | 苏州盛塔斯电子科技有限公司 | Embedded face recognition terminal capable of overcoming modeling numbers |
| CN104408780A (en) * | 2014-11-28 | 2015-03-11 | 四川浩特通信有限公司 | Face recognition attendance system |
| CN104599335A (en) * | 2015-02-26 | 2015-05-06 | 四川浩特通信有限公司 | Double-camera combined human face recognition attendance checking device |
| CN110211266A (en) * | 2019-05-29 | 2019-09-06 | 甘肃万华金慧科技股份有限公司 | A kind of gate inhibition's face identification system and method |
-
2007
- 2007-10-19 CN CNU2007201736978U patent/CN201084200Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101414387B (en) * | 2007-10-19 | 2010-06-02 | 汉王科技股份有限公司 | Embedded human face recognition gate prohibition attendance-recording machine |
| CN101685554A (en) * | 2008-09-25 | 2010-03-31 | 银河港(北京)技术有限公司 | Human face identification work-attendance checking method and system based on network |
| CN102789570A (en) * | 2011-05-19 | 2012-11-21 | 苏州盛塔斯电子科技有限公司 | System for recognizing faces |
| CN102789571A (en) * | 2011-05-19 | 2012-11-21 | 苏州盛塔斯电子科技有限公司 | Embedded face recognition terminal capable of overcoming modeling numbers |
| CN104408780A (en) * | 2014-11-28 | 2015-03-11 | 四川浩特通信有限公司 | Face recognition attendance system |
| CN104599335A (en) * | 2015-02-26 | 2015-05-06 | 四川浩特通信有限公司 | Double-camera combined human face recognition attendance checking device |
| CN110211266A (en) * | 2019-05-29 | 2019-09-06 | 甘肃万华金慧科技股份有限公司 | A kind of gate inhibition's face identification system and method |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080709 Termination date: 20161019 |