CN105389572A - All-in-one machine for human face and identity card recognition and light supplementing method capable of automatically adjusting brightness - Google Patents
All-in-one machine for human face and identity card recognition and light supplementing method capable of automatically adjusting brightness Download PDFInfo
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- CN105389572A CN105389572A CN201510908079.2A CN201510908079A CN105389572A CN 105389572 A CN105389572 A CN 105389572A CN 201510908079 A CN201510908079 A CN 201510908079A CN 105389572 A CN105389572 A CN 105389572A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/16—Human faces, e.g. facial parts, sketches or expressions
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/10—Image acquisition
- G06V10/12—Details of acquisition arrangements; Constructional details thereof
- G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
- G06V10/141—Control of illumination
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Abstract
The present invention relates to an all-in-one machine for human face and identity card recognition, and a light supplementing method capable of automatically adjusting brightness. The method solves the technical problem that a current all-in-one machine for human face and identity card recognition may cause inaccurate recognition due to the failure of automatically adjusting brightness of a light supplementing lamp. The all-in-one machine comprises a master control module, a power module, a display screen, an identity card reader, an antenna and a camera, wherein the display screen, the power module, the identity card reader and the camera are respectively connected with the master control module, and the antenna is connected with the identity card reader. The all-in-one machine also comprises a light supplementing module, wherein the light supplementing module is connected with the master control module. The present invention is widely used in an all-in-one machine for human face and identity card recognition.
Description
Technical field
The present invention relates to a kind of recognition device and light compensation method, especially relate to the light compensation method of a kind of face and I.D. identification all-in-one and adjustment brightness automatically.
Background technology
In existing face and I.D. identification all-in-one, when taking pictures to face, light compensating lamp can provide necessary illumination, but its brightness is generally fixed value, cannot light and shade environmentally automatically adjust, may be there is too dark or too bright situation in the human face photo taken, cause and identify that judgement is slow, misclassification rate is high, be unfavorable for the realization of face recognition algorithms.
Summary of the invention
The present invention causes identifying inaccurate technical matters in order to solve existing face and I.D. identification all-in-one because the brightness of light compensating lamp cannot adjust automatically, provides a kind ofly automatically to regulate the face of light filling brightness and the light compensation method of I.D. identification all-in-one and adjustment brightness automatically.
Face provided by the invention and I.D. identification all-in-one, comprise main control module, power module, display screen, identity card reader, antenna and camera, display screen, power module, identity card reader are connected with main control module respectively with camera, antenna is connected with described identity card reader, also comprise supplementary lighting module, supplementary lighting module is connected with main control module.
Preferably, supplementary lighting module comprises current limliting module, LED array and power supply chip, and current limliting module is connected with main control module, power supply chip is connected with main control module, LED array and current limliting model calling, power supply chip is connected with LED array, and power module is connected with power supply chip.
Preferably, current limliting module is provided with current-limiting resistance.
Preferably, current-limiting resistance is digital regulation resistance, and digital regulation resistance is provided with pin EN, pin U/D and pin INC; Main control module is provided with IO1 mouth, IO2 mouth, IO3 mouth and IO4 mouth, power supply chip is provided with enable pin, the enable pin of power supply chip is connected with the IO1 mouth of main control module, and IO2, IO3 of main control module and IO4 mouth are connected with pin EN, the pin U/D of digital regulation resistance and pin INC respectively.
The present invention also provides a kind of light compensation method of automatic adjustment brightness, comprises the following steps:
Step 1, after camera collection to coloured image by colored images' transmission to main control module, the monochrome information of the coloured image collected extracts by main control module, is transformed into YC by image from RGB color model
bc
rcolor model, transfer algorithm is:
The luminance component Y extracted wherein just obtains desired luminance image information;
Step 2, calculates the accumulation histogram t of luminance picture
k,
wherein, n represents the number of all pixels in luminance picture, n
jrepresent that in luminance picture, gray-scale value equals the number of pixels of i; K represents gray level, and value is 0 ~ 255; Define a luminance parameter α, work as t
55when>=15%, α value equals 1, otherwise α value equals 0;
Step 3, computed image mean flow rate s,
wherein, i represents gray-scale value, namely in luminance picture, represents brightness value, n
irepresent that gray-scale value equals the number of pixels of i; Define another luminance parameter β, when s≤55, β value equals 1, otherwise β value equals 0;
Step 4, is judged by decision algorithm:
decision=nα+mβ
Wherein, m+n=1, if the value of decision is between 0.4 to 1, the work of master control module controls supplementary lighting module is luminous; If the value of decision is less than 0.4, main control module does not send work order to supplementary lighting module.
Preferably, the m=0.6 in step 4, n=0.4.
The present invention also provides a kind of light compensation method of automatic adjustment brightness, be applied to face and I.D. identification all-in-one, face and I.D. identification all-in-one comprise main control module, power module, display screen, identity card reader, antenna, camera and supplementary lighting module, described display screen, power module, identity card reader, camera are connected with main control module respectively with supplementary lighting module, and antenna is connected with identity card reader;
Light compensation method comprises the following steps:
Step 1, after camera collection to coloured image by colored images' transmission to main control module, the monochrome information of the coloured image collected extracts by main control module, is transformed into YC by image from RGB color model
bc
rcolor model, transfer algorithm is:
The luminance component Y extracted wherein just obtains desired luminance image information;
Step 2, calculates the accumulation histogram t of luminance picture
k,
wherein, n represents the number of all pixels in luminance picture, n
irepresent that in luminance picture, gray-scale value equals the number of pixels of i; K represents gray level, and value is 0 ~ 255; Define a luminance parameter α, work as t
55when>=15%, α value equals 1, otherwise α value equals 0;
Step 3, computed image mean flow rate s,
wherein, i represents gray-scale value, namely in luminance picture, represents brightness value, n
irepresent that gray-scale value equals the number of pixels of i; Define another luminance parameter β, when s≤55, β value equals 1, otherwise β value equals 0;
Step 4, is judged by decision algorithm:
decision=nα+mβ
Wherein, m+n=1, if the value of decision is between 0.4 to 1, the work of master control module controls supplementary lighting module is luminous; If the value of decision is less than 0.4, main control module does not send work order to supplementary lighting module.
Preferably, the m=0.6 in step 4, n=0.4.
The invention has the beneficial effects as follows, can induced environment brightness, the intensity of illumination of adjustment light compensating lamp automatically, take pictures for camera and best brightness is provided, the lightness that camera is clapped is suitable, uniform illumination, greatly can improve the accuracy of recognition of face, make application scenario strong adaptability.
Further aspect of the present invention, by the description of following embodiment, is clearly recorded.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
The structural representation that Fig. 2 is current limliting module when being digital regulation resistance.
10. main control module; 20. supplementary lighting module; 21. current limliting modules; 22.LED array; 23. power supply chips; 30. power modules; 40. display screens; 50. identity card readers; 60. antennas; 70. cameras; 80. take pictures regulating part.
Embodiment
Referring to accompanying drawing, with specific embodiment, the present invention is described in further detail.
As shown in Figure 1, supplementary lighting module 20 comprises current limliting module 21, LED array 22 and power supply chip 23, and current limliting module 21 is connected with main control module 10, and power supply chip 23 is connected with main control module 10, LED array 22 is connected with current limliting module 21, and power supply chip 23 is connected with LED array 22.Display screen 40 is connected with main control module 10, and the output terminal of power module 30 is connected with main control module 10, power supply chip 23 and display screen 40 respectively.Identity card reader 50 is connected with main control module 10, and antenna 60 is connected with identity card reader 50.Camera 70 is connected with main control module 10, and regulating part 80 of taking pictures is connected with camera 70.
LED array 22 is made up of the LED element of emission spectrum scope in visible region, and current limliting module 21 can adopt current-limiting resistance.
Main control module 10 is that technical grade controls mainboard, with interfaces such as usb communication interface and GPIO, can the equipment such as externally connected with display screen, camera, light compensating lamp, identity card reader, USBHUB, audio amplifier, keyboard, mouse, and by Interface Controller external unit.
Identity card reader 50 adopts the module of Ministry of Public Security's unified payment, and can read the relevant information (comprising identification card number, photo, sex, age, address etc.) in I.D., report main control module 10, false evidence information cannot be extracted.Antenna 60 is installed on face and I.D. identification all-in-one surface, for emitting radio frequency signal and reception I.D. electronic tag return message.
Camera 70 is mounted on the fixture of adjustable-height and angle in equipment, by regulating height and angle, enable camera photograph the overwhelming majority to swipe the card the complete positive face photo of personnel, camera 70 capture pictures reaches main control module 10, and the unlatching of camera 70 and candid photograph action are subject to the control of main control module 10.
As shown in Figure 2, supplementary lighting module 20 is positioned at camera 70 side, provides necessary illumination for taking pictures.Current limliting module 21 can adopt digital regulation resistance.The enable pin of power supply chip 23 controls by the IO1 mouth of main control module 10, and when this IO1 mouth level sets high, power supply chip 23 works, output voltage Vout, to realize the light on and off of LED array 22.The resistance of digital regulation resistance controls by IO2, IO3, IO4 mouth of main control module 10, IO2, IO3, IO4 mouth enable pin EN, the pin U/D selecting resistance increase or reduction direction of control figure potentiometer, pin INC of resistance single adjustment step value respectively of main control module 10, when supply voltage is constant, the resistance of digital regulation resistance increases, and electric current diminishes, LED array 22 brightness is dimmed, and resistance reduces, and ER effect is large, LED array 22 brightness brightens.
Display screen 40 can be touch display screen, has touch function, provides good human-computer interaction interface, to realize the operation to whole device.
Power module 30 for changing alternating current into direct current, for parts and module provide power supply.
Taking pictures regulating part 80 can according to actual use scenes, the height of adjustment camera and angle of inclination, enables camera photograph the overwhelming majority and to swipe the card the complete positive face photo of personnel.
The course of work is described below:
Holder is at antenna 60 place brush I.D., antenna induction is to I.D. electronic tag and ID (identity number) card information is passed to identity card reader 50, ID (identity number) card information (comprising identification card number, photo, sex, age, address etc.) is reported main control module 10 by identity card reader 50, and false evidence information cannot be extracted.Main control module 10 preserves ID (identity number) card information, controls to open camera 70 simultaneously and carries out face snap.The image information that main control module 10 gathers according to camera 70 judges ambient brightness, thus light filling is carried out in the unlatching of control supplementary lighting module 20.
The face front photochrome that camera 70 is clapped is sent to main control module 10, and main control module 10 infers whether be same people.Inferred results is reached host computer or backstage by main control module 10, and host computer is according to the action of the equipment such as output control gate and alarm lamp.
After main control module 10 receives the coloured image of camera 70 transmission, the realtime graphic that the software run in main control module 10 can transmit according to camera 70 judge brightness case, and process is as follows:
Step 1, extracts the monochrome information of the coloured image collected, and is transformed into YC by image from RGB color model
bc
rcolor model, transfer algorithm is:
The luminance component Y extracted wherein just obtains desired luminance image information.
Step 2, calculates the accumulation histogram t of luminance picture
k,
wherein, n represents the number of all pixels in luminance picture, n
irepresent that in luminance picture, gray-scale value equals the number of pixels of i.K represents gray level, and value is 0 ~ 255.Work as t
55when>=15%, in image, 15% even more pixel brightness value is lower than 55, and this situation represents that shooting environmental is very dark, so now define a luminance parameter α and make its value equal 1, otherwise makes α value equal 0.
Step 3, computed image mean flow rate s,
wherein i represents gray-scale value, namely in luminance picture, represents brightness value, n
irepresent that gray-scale value equals the number of pixels of i.When s≤55, represent that the mean flow rate of pixel in image is below 55, can think that shooting environmental is now relatively darker, so define another luminance parameter β and make its value equal 1, otherwise make β value equal 0.
Step 4, consider accumulation histogram and the average brightness value of luminance picture, whether final decision controls supplementary lighting module 20 and provides light source, is judged by decision algorithm:
decision=nα+mβ
Wherein, m+n=1, usually, m=0.6, n=0.4.If the value of decision is between 0.4 to 1, made real scape luminance shortage is described, the IO1 mouth level of main control module 10 sets high, control power supply chip 23 to open, the IO2 mouth level of main control module 10 sets high, digital regulation resistance works, the change direction of the resistance of the IO3 mouth control figure potentiometer of main control module 10 is for diminishing, the IO4 mouth of main control module 10 adjusts the resistance of 1 digital regulation resistance according to the step value of setting, if the LED array after adjustment 32 brightness meets the demands, then camera 70 is taken pictures, if brightness does not meet the demands, then the IO4 mouth of main control module 10 continues the resistance of adjustment digital regulation resistance, until brightness meets the demands.
If the value of decision is less than 0.4, illustrate that made real scape brightness is enough, then the IO1 mouth level of main control module 10 sets low, and power supply chip 23 does not work, and the IO2 mouth level of main control module 10 sets low, and digital regulation resistance does not work.
The above, only to the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Every in claim limited range of the present invention, any amendment made, equivalent replacement, improvement etc., all should within protection scope of the present invention.
Claims (8)
1. a face and I.D. identification all-in-one, comprise main control module, power module, display screen, identity card reader, antenna and camera, described display screen, power module, identity card reader and camera are connected with described main control module respectively, described antenna is connected with described identity card reader, it is characterized in that, also comprise supplementary lighting module, described supplementary lighting module is connected with described main control module.
2. face according to claim 1 and I.D. identification all-in-one, it is characterized in that, described supplementary lighting module comprises current limliting module, LED array and power supply chip, described current limliting module is connected with described main control module, described power supply chip is connected with described main control module, described LED array and described current limliting model calling, described power supply chip is connected with described LED array, and described power module is connected with described power supply chip.
3. face according to claim 2 and I.D. identification all-in-one, is characterized in that, described current limliting module is provided with current-limiting resistance.
4. face according to claim 3 and I.D. identification all-in-one, it is characterized in that described current-limiting resistance is digital regulation resistance, described digital regulation resistance is provided with pin EN, pin U/D and pin INC; Described main control module is provided with IO1 mouth, IO2 mouth, IO3 mouth and IO4 mouth, described power supply chip is provided with enable pin, the enable pin of described power supply chip is connected with the IO1 mouth of described main control module, and IO2, IO3 of described main control module and IO4 mouth are connected with pin EN, the pin U/D of described digital regulation resistance and pin INC respectively.
5. a light compensation method for adjustment brightness automatically, is characterized in that, comprise the following steps:
Step 1, after camera collection to coloured image by colored images' transmission to main control module, the monochrome information of the coloured image collected extracts by main control module, is transformed into YC by image from RGB color model
bc
rcolor model, transfer algorithm is:
The luminance component Y extracted wherein just obtains desired luminance image information;
Step 2, calculates the accumulation histogram t of luminance picture
k,
wherein, n represents the number of all pixels in luminance picture, n
irepresent that in luminance picture, gray-scale value equals the number of pixels of i; K represents gray level, and value is 0 ~ 255; Define a luminance parameter α, work as t
55when>=15%, α value equals 1, otherwise α value equals 0;
Step 3, computed image mean flow rate s,
wherein, i represents gray-scale value, namely in luminance picture, represents brightness value, n
irepresent that gray-scale value equals the number of pixels of i; Define another luminance parameter β, when s≤55, β value equals 1, otherwise β value equals 0;
Step 4, is judged by decision algorithm:
decision=nα+mβ
Wherein, m+n=1, if the value of decision is between 0.4 to 1, the work of master control module controls supplementary lighting module is luminous; If the value of decision is less than 0.4, main control module does not send work order to supplementary lighting module.
6. light compensation method according to claim 5, is characterized in that, the m=0.6 in described step 4, n=0.4.
7. one kind adjusts the light compensation method of brightness automatically, it is characterized in that, be applied to face and I.D. identification all-in-one, described face and I.D. identification all-in-one comprise main control module, power module, display screen, identity card reader, antenna, camera and supplementary lighting module, described display screen, power module, identity card reader, camera and supplementary lighting module are connected with described main control module respectively, and described antenna is connected with described identity card reader;
Described light compensation method comprises the following steps:
Step 1, after camera collection to coloured image by colored images' transmission to main control module, the monochrome information of the coloured image collected extracts by main control module, is transformed into YC by image from RGB color model
bc
rcolor model, transfer algorithm is:
The luminance component Y extracted wherein just obtains desired luminance image information;
Step 2, calculates the accumulation histogram t of luminance picture
k,
wherein, n represents the number of all pixels in luminance picture, n
irepresent that in luminance picture, gray-scale value equals the number of pixels of i; K represents gray level, and value is 0 ~ 255; Define a luminance parameter α, work as t
55when>=15%, α value equals 1, otherwise α value equals 0;
Step 3, computed image mean flow rate s,
wherein, i represents gray-scale value, namely in luminance picture, represents brightness value, n
irepresent that gray-scale value equals the number of pixels of i; Define another luminance parameter β, when s≤55, β value equals 1, otherwise β value equals 0;
Step 4, is judged by decision algorithm:
decision=nα+mβ
Wherein, m+n=1, if the value of decision is between 0.4 to 1, the work of master control module controls supplementary lighting module is luminous; If the value of decision is less than 0.4, main control module does not send work order to supplementary lighting module.
8. light compensation method according to claim 7, is characterized in that, the m=0.6 in described step 4, n=0.4.
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CN106068048A (en) * | 2016-05-25 | 2016-11-02 | 中国地质大学(武汉) | A kind of light adaptive regulation method based on face brightness identification and system |
CN106407950A (en) * | 2016-09-30 | 2017-02-15 | 维沃移动通信有限公司 | Facial information identification method and mobile terminal |
CN106780875A (en) * | 2016-12-07 | 2017-05-31 | 深圳市万睿智能科技有限公司 | A kind of recognition of face gate inhibition integrated apparatus and its recognition methods |
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CN107463931A (en) * | 2017-07-06 | 2017-12-12 | 国家电网公司 | A kind of real-time pointer instrument reading method and device based on ARM platforms |
CN108965677A (en) * | 2018-09-04 | 2018-12-07 | 深圳市威特迪科技有限公司 | A kind of control circuit and control method according to camera picture Mass adjust- ment light filling |
CN112991607A (en) * | 2021-04-02 | 2021-06-18 | 中建八局第二建设有限公司 | Access control system capable of effectively collecting entrance face information |
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