CN101414387B - Embedded human face recognition gate prohibition attendance-recording machine - Google Patents
Embedded human face recognition gate prohibition attendance-recording machine Download PDFInfo
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- CN101414387B CN101414387B CN2007101761067A CN200710176106A CN101414387B CN 101414387 B CN101414387 B CN 101414387B CN 2007101761067 A CN2007101761067 A CN 2007101761067A CN 200710176106 A CN200710176106 A CN 200710176106A CN 101414387 B CN101414387 B CN 101414387B
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Abstract
The invention relates to an embedded type door control work attendance checking machine with the function of face recognition, which belongs to the technical field of biological characteristic recognition. The door control work attendance checking machine adopts the technical scheme that an embedded type host DSP is used, and the machine comprises a CMOS infrared photography module used for capturing facial images, an infrared Led Module used as a constant light source, a Wiegand interface and a USB interface; besides, infrared light filters with narrow bands are arranged on the camera shot of the CMOS infrared photography module, and the band width of the infrared light filters with narrow bands only allows near infrared light emitted by the infrared Led Module to pass through and shields visible light and other kinds of infrared light in the sunlight; the DSP presents the simulated generation of door control Wiegand signals by an IO interface and is used as a standard output control means for door control. The machine adopts the infrared light filters with narrow bands and the infrared Led Module to thoroughly solve the problem of visible light influence, which troubles face recognition for a long time, and the machine has the advantages of unique convenience, untouchable performance and stability and can be widely applied to the field of door control work attendance check.
Description
Technical field
The invention belongs to the living things feature recognition field, relate to a kind of embedded human face recognition gate prohibition attendance-recording machine, particularly relate 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 CN 1110767C.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.
Summary of the invention
Technical matters to be solved by this invention 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 that the present invention solves the problems of the technologies described above employing 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 invention has the beneficial effects as follows, 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.Cost of the present invention, 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
The present invention is further described below in conjunction with drawings and embodiments.
Fig. 1 is a hardware block diagram of the present invention.
Fig. 2 is the spectrum transmitting rate curve of infrared narrow band filter of the present invention.
Fig. 3 is the assembling synoptic diagram of infrared narrow band filter of the present invention and camera module group lens.
Fig. 4 is a menu function module map of the present invention.
Fig. 5 is the FB(flow block) that the present invention carries out recognition of face.
Fig. 6 is the system chart that the present invention 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 invention.The present invention 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, Data0, Data1 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 special use of the present invention.The wavelength of visible light scope approximately is 400-700nm, and 700-1200nm approximately is near infrared light (nearinfrared) 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 invention 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 of the present invention 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 invention.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 present invention.Recognition of face is a most principal work state of the present invention, 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 present invention.The present invention supports 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 present invention 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 present invention 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 is included in CMOS infrared photography module, the infrarede emitting diode group as constant light source, Wei root interface and the USB interface of catching facial image under the fixing infrared light supply;
Described CMOS infrared photography module is connected with the video port VP of primary processor, impinges upon on the object reflection through eyeglass block visible light line during imaging to image sensor chip at light, and allows infrared ray to pass through; Comprise common lens group and image sensor chip, common lens group front is equipped with an infrared narrow band filter;
The spectrum transmitting rate curve of described infrared narrow band filter is an arrowband curve, and the centre wavelength of arrowband curve is corresponding with the centre wavelength of infrarede emitting diode, and the inhibition degree of depth of visible light reaches 10E-6, and the inhibition degree of depth of infrared part reaches 10E-3.
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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| CN2007101761067A CN101414387B (en) | 2007-10-19 | 2007-10-19 | Embedded human face recognition gate prohibition attendance-recording machine |
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| CN2007101761067A CN101414387B (en) | 2007-10-19 | 2007-10-19 | Embedded human face recognition gate prohibition attendance-recording machine |
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| CN101414387B true CN101414387B (en) | 2010-06-02 |
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| CN101887600A (en) * | 2009-05-14 | 2010-11-17 | 汉王科技股份有限公司 | Identity authentication method and device |
| CN101661557B (en) * | 2009-09-22 | 2012-05-02 | 中国科学院上海应用物理研究所 | Face recognition system and face recognition method based on intelligent card |
| CN102314720A (en) * | 2011-09-13 | 2012-01-11 | 深圳市中联创新自控系统有限公司 | Fingerprint access control system |
| CN102890667A (en) * | 2012-09-17 | 2013-01-23 | 广州英码信息科技有限公司 | Device and method for processing wiegand data |
| CN103035051B (en) * | 2012-12-24 | 2016-01-27 | 李军 | A kind of embedded human face identification gate control system |
| CN104036557B (en) * | 2013-03-06 | 2016-12-28 | 中国科学技术大学苏州研究院 | Distributed human face identification work-attendance checking system based on B/S framework and Work attendance method thereof |
| CN103280005A (en) * | 2013-04-16 | 2013-09-04 | 无锡市崇安区科技创业服务中心 | Entrance guard system |
| CN103279999A (en) * | 2013-05-14 | 2013-09-04 | 苏州福丰科技有限公司 | Card reading system based on face recognition |
| CN103235942A (en) * | 2013-05-14 | 2013-08-07 | 苏州福丰科技有限公司 | Facial recognition method applied to entrance guard |
| CN104392503A (en) * | 2014-11-21 | 2015-03-04 | 无锡科思电子科技有限公司 | No-card access control and attendance check method |
| CN104392521A (en) * | 2014-11-21 | 2015-03-04 | 无锡科思电子科技有限公司 | No-card-punching access control and attendance check system |
| CN105046789A (en) * | 2015-08-13 | 2015-11-11 | 宝鸡市交通信息工程研究所 | Specific facial identity-based face identification access control system and implementation method |
| CN106340094A (en) * | 2016-08-26 | 2017-01-18 | 广西小草信息产业有限责任公司 | Access control system and implementation method thereof |
| CN106530429A (en) * | 2016-10-18 | 2017-03-22 | 江苏经贸职业技术学院 | Intelligent electronic door plate control system |
| CN108053506A (en) * | 2017-12-08 | 2018-05-18 | 湖北民族学院 | Classroom roll-call system and roll-call method |
| CN108091014A (en) * | 2017-12-21 | 2018-05-29 | 广东汇泰龙科技有限公司 | A kind of application method, the system of the voice assistant based on cloud lock APP |
| CN108091021A (en) * | 2017-12-28 | 2018-05-29 | 广州超越数码科技有限公司 | A kind of access control system based on recognition of face |
| CN108182414B (en) | 2017-12-29 | 2021-03-16 | 创新先进技术有限公司 | Traffic detection method, device and system |
| EP3828841A4 (en) | 2018-07-25 | 2021-09-08 | Yunding Network Technology (Beijing) Co., Ltd. | Smart device control method and system |
| CN108898725B (en) * | 2018-07-25 | 2021-03-02 | 云丁智能科技（北京）有限公司 | Door lock control method and device |
| CN109255851A (en) * | 2018-08-31 | 2019-01-22 | 镇江赛唯思智能科技有限公司 | A kind of Work attendance method and system based on recognition of face |
| CN111444855B (en) * | 2020-03-27 | 2023-09-22 | 国网河北省电力有限公司沧州供电分公司 | Attendance checking method and system based on face recognition |
| CN111612943A (en) * | 2020-04-24 | 2020-09-01 | 上海图丽信息技术有限公司 | Face recognition entrance guard attendance system |
| CN112598830B (en) * | 2020-12-10 | 2022-12-27 | 厦门四信通信科技有限公司 | Intelligent terminal of gate |
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