CN207965918U - A kind of novel face pattern recognition system - Google Patents
A kind of novel face pattern recognition system Download PDFInfo
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- CN207965918U CN207965918U CN201820039537.2U CN201820039537U CN207965918U CN 207965918 U CN207965918 U CN 207965918U CN 201820039537 U CN201820039537 U CN 201820039537U CN 207965918 U CN207965918 U CN 207965918U
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Abstract
The utility model discloses a kind of novel face pattern recognition system, including sequentially connected facial image acquisition module, image pre-processing module, Face detection module and feature extraction and identification module, the facial image acquisition module includes image acquisition units, described image collecting unit is connected with the dynamic compensating unit for stablizing face light stability, the dynamic compensating unit is connected with LED drive chip, and the LED drive chip is connected with LED array.Image acquisition units in the utility model are when acquiring facial image, when local environment brightness is relatively low, the dynamic compensating unit output control signal being connect with image acquisition units, LED drive unit is driven to start to work, LED drive chip drives LED array to open, enhance the ambient brightness where facial image acquisition module, improves the clarity of image acquisition units acquisition facial image, enhance the accuracy of identification of face identification system.
Description
Technical field
The utility model is related to technical field of face recognition, are a kind of novel face identification systems specifically.
Background technology
Face identification system is an emerging biological identification technology using face recognition technology as core.It is widely used
Regional characteristics analysis algorithm has merged computer image processing technology with biostatistics principle in one, has utilized computer graphic
Picture treatment technology extracts portrait characteristic point from video, and face identification system has a wide range of applications：Recognition of face room entry/exit management
System, recognition of face access control and attendance system, recognition of face monitoring management, the strick precaution of recognition of face computer security, recognition of face photo
Search, recognition of face come to visit registration, recognition of face ATM machine intelligent video alarm system, recognition of face prison intelligent alarm system,
Recognition of face RFID intelligence clearance system and recognition of face public security criminal pursue and capture an escaped prisoner intelligent alarm system etc., the scope of application：Park,
The public affairs such as factory, supermarket, cell square, conference centre, stadiums, school, hospital, residential quarter, commercial street, the large-scale market of farm produce
The significant points of many activities and gathering place, hotel, food and drink, public place of entertainment, hall's entrance of office building, elevator and other masters
Want the monitoring video purposes of the indoor and outdoors range such as channel.But the cmos image of the use in traditional face identification system senses
The image-forming principle of device is：Pel array is irradiated by ambient light, photoelectric effect occurs, corresponding charge is generated in pixel unit.
Row selection logic unit is as needed, gates corresponding row pixel unit.Due to by the bright of face identification system local environment
Degree influences, and leads to the image quality for influencing cmos image sensor, and then influence the accuracy of identification of face identification system.
Utility model content
The purpose of this utility model is to provide a kind of novel face identification systems, for solving in the prior art due to people
The problem that the brightness of face identifying system local environment causes recognition of face precision not high.
In order to achieve the above object, the utility model is achieved through the following technical solutions：
A kind of novel face pattern recognition system, including sequentially connected facial image acquisition module, image preprocessing mould
Block, Face detection module and feature extraction and identification module, the facial image acquisition module includes image acquisition units, institute
It states image acquisition units and is connected with dynamic compensating unit for stablizing face light stability, the dynamic compensating unit is connected with
LED drive chip, the LED drive chip are connected with LED array.
Operation principle：
Then facial image is transmitted to image preprocessing mould by facial image acquisition module for being imaged to face
Block.Image pre-processing module includes the extraction of the colour of skin for handling the facial image of acquisition, the brightness change of image,
Gaussian smoothing, greyscale transformation, gray scale balance and contrast enhancing, then to treated, image carries out Face detection function, will
Eyes, face and nose etc. are marked, in order to carry out feature extraction.It is then transmit to feature extraction and identification module, it will
Eyes, face and nose after positioning extract, and are compared with the value of background data base and complete identification function.Facial image
Acquisition module includes image acquisition units, image acquisition units when acquiring facial image, when local environment brightness is relatively low,
The dynamic compensating unit output control signal being connect with image acquisition units, driving LED drive unit are started to work, LED drivings
Chip drives LED array is opened, and the ambient brightness where facial image acquisition module is enhanced, and is improved image acquisition units and is acquired people
The clarity of face image enhances the accuracy of identification of face identification system.
Further, described image collecting unit includes optical lens and is arranged on optical lens for filtering out infrared ray
Optical filter, the optical lens is connected with cmos image sensor.
Operation principle：
Image acquisition units include the optical lens for imaging, and optical lens forms figure on cmos image sensor
Picture, since cmos image sensor is more sensitive to infrared ray, it is therefore desirable to increase coating or optical filter on optical lens,
Some or all of infrared ray is filtered out, the influence of infrared ray is reduced.
Further, the optical filter is also associated with optical filter mobile device, and the optical filter mobile device is connected with micro-
Type motor.
Operation principle：
Micromotor controls the movement of optical filter mobile device, and optical filter mobile device connects optical filter, drives optical filter
It is mobile, for adjusting the distance between optical filter and optical lens, it is further reduced other light such as infrared light, ultraviolet light etc. pair
Imaging impacts.
Further, the dynamic compensating unit includes that the dynamic power supplies for controlling chip and being connect with the control chip are mended
Circuit and conduction time control unit are repaid, the dynamic power supplies compensation circuit is connect with the conduction time control unit.
Operation principle：
Dynamic compensating unit includes the control chip being connect with cmos image sensor, and control chip is passed according to cmos image
The face light source parameters that sensor detects send a command to conduction time control unit, and conduction time control unit is according to setting
The work of time driving LED drive unit, LED array lights.Meanwhile the work of chip drives dynamic power supplies compensation circuit is controlled,
Increase storage electric energy, electric energy is provided to LED array.
Further, the dynamic power supplies compensation circuit includes sequentially connected power supply unit, anti-reverse current unit and pole
Property capacitor cell, is connected with compensating switch unit, the compensating switch unit between the power supply unit and polar capacitor unit
It is connect with the output end of the control chip, the polar capacitor unit is connect with the conduction time control unit, described to lead
Electric time control unit is connect with the LED drive unit, and the power supply unit is also connect with the LED array.
Operation principle：
Output current is stored after anti-reverse current unit to polarity capacitor power in power supply unit, when control chip output
High level, compensating switch unit form access, and the electric energy of polar capacitor unit storage is discharged by LED array, and when by conduction
Between control unit control compensating switch unit access time, to control the startup time of LED array.
Further, side's reverse current unit is zener diode.
Zener diode is for realizing power supply unit to the unidirectional current of polarity capacitor cell.
Further, the compensating switch unit is CMOS triodes.
Compensating switch unit is CMOS triodes, for realizing the charge and discharge of control chip controls polar capacitor unit
Journey.It controls chip and uses MSP430F149 microcontrollers.
The utility model compared with prior art, has the following advantages and advantageous effect：
Image acquisition units in the utility model are when acquiring facial image, when local environment brightness is relatively low, with
The dynamic compensating unit output control signal of image acquisition units connection, driving LED drive unit are started to work, and LED drives core
Piece drives LED array to open, and enhances the ambient brightness where facial image acquisition module, improves image acquisition units and acquires face
The clarity of image enhances the accuracy of identification of face identification system.
Description of the drawings
Fig. 1 is the system structure diagram of the utility model；
Fig. 2 is the functional block diagram of facial image acquisition module.
Specific implementation mode
The utility model is described in further detail with reference to embodiment, but the embodiment of the utility model is not
It is limited to this.
Embodiment 1：
In conjunction with shown in attached drawing 1 and Fig. 2, a kind of novel face pattern recognition system, including sequentially connected facial image obtain
Modulus block, image pre-processing module, Face detection module and feature extraction and identification module, the facial image acquisition module
Including image acquisition units, described image collecting unit is connected with the dynamic compensating unit for stablizing face light stability, institute
It states dynamic compensating unit and is connected with LED drive chip, the LED drive chip is connected with LED array.
Operation principle：
Then facial image is transmitted to image preprocessing mould by facial image acquisition module for being imaged to face
Block.Image pre-processing module includes the extraction of the colour of skin for handling the facial image of acquisition, the brightness change of image,
Gaussian smoothing, greyscale transformation, gray scale balance and contrast enhancing, then to treated, image carries out Face detection function, will
Eyes, face and nose etc. are marked, in order to carry out feature extraction.It is then transmit to feature extraction and identification module, it will
Eyes, face and nose after positioning extract, and are compared with the value of background data base and complete identification function.Facial image
Acquisition module includes image acquisition units, image acquisition units when acquiring facial image, when local environment brightness is relatively low,
The dynamic compensating unit output control signal being connect with image acquisition units, driving LED drive unit are started to work, LED drivings
Chip drives LED array is opened, and the ambient brightness where facial image acquisition module is enhanced, and is improved image acquisition units and is acquired people
The clarity of face image enhances the accuracy of identification of face identification system.
Embodiment 2：
On the basis of embodiment 1, in conjunction with shown in attached drawing 1 and Fig. 2, described image collecting unit includes optical lens and sets
It sets the optical filter for filtering out infrared ray, the optical lens on optical lens and is connected with cmos image sensor.
Operation principle：
Image acquisition units include the optical lens for imaging, and optical lens forms figure on cmos image sensor
Picture, since cmos image sensor is more sensitive to infrared ray, it is therefore desirable to increase coating or optical filter on optical lens,
Some or all of infrared ray is filtered out, the influence of infrared ray is reduced.
Further, the optical filter is also associated with optical filter mobile device, and the optical filter mobile device is connected with micro-
Type motor.
Operation principle：
Micromotor controls the movement of optical filter mobile device, and optical filter mobile device connects optical filter, drives optical filter
It is mobile, for adjusting the distance between optical filter and optical lens, it is further reduced other light such as infrared light, ultraviolet light etc. pair
Imaging impacts.
Embodiment 3：
On the basis of embodiment 2, in conjunction with shown in attached drawing 1 and Fig. 2, the dynamic compensating unit include control chip and with
The dynamic power supplies compensation circuit of the control chip connection and conduction time control unit, the dynamic power supplies compensation circuit and institute
State the connection of conduction time control unit.
Operation principle：
Dynamic compensating unit includes the control chip being connect with cmos image sensor, and control chip is passed according to cmos image
The face light source parameters that sensor detects send a command to conduction time control unit, and conduction time control unit is according to setting
The work of time driving LED drive unit, LED array lights.Meanwhile the work of chip drives dynamic power supplies compensation circuit is controlled,
Increase storage electric energy, electric energy is provided to LED array.
Further, the dynamic power supplies compensation circuit includes sequentially connected power supply unit, anti-reverse current unit and pole
Property capacitor cell, is connected with compensating switch unit, the compensating switch unit between the power supply unit and polar capacitor unit
It is connect with the output end of the control chip, the polar capacitor unit is connect with the conduction time control unit, described to lead
Electric time control unit is connect with the LED drive unit, and the power supply unit is also connect with the LED array.
Operation principle：
Output current is stored after anti-reverse current unit to polarity capacitor power in power supply unit, when control chip output
High level, compensating switch unit form access, and the electric energy of polar capacitor unit storage is discharged by LED array, and when by conduction
Between control unit control compensating switch unit access time, to control the startup time of LED array.
Embodiment 4：
On the basis of embodiment 3, in conjunction with shown in attached drawing 1 and Fig. 2, side's reverse current unit is zener diode.
Zener diode is for realizing power supply unit to the unidirectional current of polarity capacitor cell.
Further, the compensating switch unit is CMOS triodes.
Compensating switch unit is CMOS triodes, for realizing the charge and discharge of control chip controls polar capacitor unit
Journey.It controls chip and uses MSP430F149 microcontrollers.
The above is only the preferred embodiment of the utility model, not does limit in any form to the utility model
System, any simple modification made by the above technical examples according to the technical essence of the present invention, equivalent variations, each falls within
Within the scope of protection of the utility model.
Claims (7)
1. a kind of novel face pattern recognition system, including sequentially connected facial image acquisition module, image pre-processing module,
Face detection module and feature extraction and identification module, which is characterized in that the facial image acquisition module includes that image is adopted
Collect unit, described image collecting unit is connected with the dynamic compensating unit for stablizing face light stability, the dynamic compensation
Unit is connected with LED drive chip, and the LED drive chip is connected with LED array.
2. a kind of novel face pattern recognition system according to claim 1, which is characterized in that described image collecting unit
Including optical lens and the optical filter for filtering out infrared ray is set on optical lens, the optical lens is connected with CMOS figures
As sensor.
3. a kind of novel face pattern recognition system according to claim 2, which is characterized in that the optical filter is also connected with
There are optical filter mobile device, the optical filter mobile device to be connected with micromotor.
4. a kind of novel face pattern recognition system according to claim 3, which is characterized in that the dynamic compensating unit
The dynamic power supplies compensation circuit and conduction time control unit being connect including control chip and with the control chip, the dynamic
Power supply compensation circuit is connect with the conduction time control unit.
5. a kind of novel face pattern recognition system according to claim 4, which is characterized in that the dynamic power supplies compensation
Circuit includes sequentially connected power supply unit, anti-reverse current unit and polar capacitor unit, the power supply unit and polar capacitor
Compensating switch unit is connected between unit, the compensating switch unit is connect with the output end of the control chip, the pole
Property capacitor cell connect with the conduction time control unit, the conduction time control unit and the LED drive unit connect
It connects, the power supply unit is also connect with the LED array.
6. a kind of novel face pattern recognition system according to claim 5, which is characterized in that side's reverse current unit
For zener diode.
7. a kind of novel face pattern recognition system according to claim 5, which is characterized in that the compensating switch unit
For CMOS triodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820039537.2U CN207965918U (en) | 2018-01-10 | 2018-01-10 | A kind of novel face pattern recognition system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820039537.2U CN207965918U (en) | 2018-01-10 | 2018-01-10 | A kind of novel face pattern recognition system |
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| Publication Number | Publication Date |
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| CN207965918U true CN207965918U (en) | 2018-10-12 |
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| CN201820039537.2U Expired - Fee Related CN207965918U (en) | 2018-01-10 | 2018-01-10 | A kind of novel face pattern recognition system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113837044A (en) * | 2021-09-13 | 2021-12-24 | 深圳市罗湖医院集团 | Organ positioning method based on ambient brightness and related equipment |
-
2018
- 2018-01-10 CN CN201820039537.2U patent/CN207965918U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113837044A (en) * | 2021-09-13 | 2021-12-24 | 深圳市罗湖医院集团 | Organ positioning method based on ambient brightness and related equipment |
| CN113837044B (en) * | 2021-09-13 | 2024-01-23 | 深圳市罗湖医院集团 | Organ positioning method based on ambient brightness and related equipment |
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Granted publication date: 20181012 Termination date: 20210110 |