CN1687956A - Self-aid man face image acquiring system based on ultrasonic distance measurement - Google Patents
Self-aid man face image acquiring system based on ultrasonic distance measurement Download PDFInfo
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- CN1687956A CN1687956A CN 200510025500 CN200510025500A CN1687956A CN 1687956 A CN1687956 A CN 1687956A CN 200510025500 CN200510025500 CN 200510025500 CN 200510025500 A CN200510025500 A CN 200510025500A CN 1687956 A CN1687956 A CN 1687956A
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Abstract
The invention discloses an ultrasonic distance measurement-based autonomous human face picture collecting system, comprising ultrasonic distance measuring unit, collecting unit, audio-video interactive unit and autonomous pitching mechanism; by the ultrasonic distance measurement and the voice prompt of the audio-video interactive unit, it makes a user reach the optimum position for imaging his face in front of a camera by moving forward and backward; by using an ultrasonic height measuring device to measure the height of the user, and according to the measured height, it adjusts the pitching angle alpha of the camera to make the human face able to be imaged in a vertically central position for collecting image and adjusts the human face to a horizontally central position for collecting image by the feedback of the video unit; thus, makes the system able to collect higher quality picture of human face.
Description
Technical field
The present invention relates to acquisition technology, particularly relate to a kind of acquisition technique of the self-aid man face image based on ultrasonic ranging.
Background technology
Traditional image that face identification system adopted is to get access in conventional collecting device, it generally is made up of CCD that is fixed on the belt length tight shot on the support or CMOS camera, if consider mutual with system, can above or below camera, install the liquid crystal display that can show images acquired in real time additional, when images acquired, the user can carry out suitable adjustment according to the image that shows in the liquid crystal display.
The advantage of this harvester is that system design is simple, and the user interactions collection is more directly perceived.But when face was discerned owing to conduct oneself, the factor that influences recognition performance was a lot, comprises sphere distortion level of illumination, posture, image resolution ratio, images acquired or the like, and therefore high-quality people's face acquisition system will play crucial effects to recognition of face.And there is inborn weakness in the acquisition system that only adopts camera and liquid crystal display to form, even if user's fitness is very high, but the user judges image quality in the liquid crystal display and recognition system requires always to exist a certain distance to picture quality, different as the user with distance between the camera, camera is selected the long telephoto lens of the depth of field, therefore judge that the user resolution of people's face in the image that image all collects under the situation more clearly will have a great difference, and the user can't judge great resolution recognition effect the best; User's height difference and for example, camera lens is fixed, people's face residing position difference in image then, ideal situation is the center that people's face should be in image, like this because of the sphere distortion due to the camera lens also with minimum, if and people's face residing position in image is unfixing, deviation to a certain degree will take place in the facial image that front and back collect.Above-mentionedly either way will directly influence accuracy of face identification.Therefore, design a kind of people's face acquisition system that can gather higher image quality, have very important significance to allow to carrying out recognition of face exactly.
Summary of the invention
At the shortcoming that exists in the above-mentioned prior art, technical matters to be solved by this invention provides a kind of self-aid man face image acquiring system based on ultrasonic ranging that can gather higher image quality.
In order to solve the problems of the technologies described above, a kind of self-aid man face image acquiring system provided by the present invention based on ultrasonic ranging,
Comprise: a collecting unit, to form with the display screen that equally also is connected camera by the Flame Image Process main frame of camera, the capture card that connects camera, connection capture card, camera is arranged at the display screen below;
Also comprise: a ultrasonic ranging unit, by the supersonic range finder that is used to measure distance between user and the camera and the ultrasound wave height measuring device that is used to measure user's height form, the parallel sustained height place, display screen below that is arranged at of supersonic range finder and camera, system will move forward and backward according to the distance value of this measurement device guiding user, the ultrasound wave height measuring device be arranged at the best standing place of user directly over;
One audio frequency and video interactive unit is arranged at the voice-output device of display screen top, is used to the voice suggestion that guides the user to move forward and backward, and the feedback information guiding user who provides by display screen adjusts the shooting attitude;
One autonomous type luffing mechanism; Be provided with and drive the stepper motor that camera is adjusted luffing angle, can control the adjustment that camera is made corresponding luffing angle, make camera can aim at user people's face center; Camera angle of pitch α is calculated as follows: tan α=(H1-H2-L2)/L1, wherein, H1 is the distance between ultrasound wave height measuring device and the ground, H2 is that the distance between camera and the ground is, L2 is the distance between the ultrasound wave height measuring device and the user crown, and L1 is the horizontal range between supersonic range finder and the user.
Utilize the self-aid man face image acquiring system based on ultrasonic ranging provided by the invention,, make the user can move forward and backward the optimum position that before camera, reaches the imaging of people's face owing to adopt the voice suggestion of supersonic range finder range finding and audio frequency and video interactive unit; Measure user's height owing to adopt the ultrasound wave height measuring device, and according to the distance between the user's height that measures and user and the camera, by tan α=(H1-H2-L2)/L1, automatically adjust the luffing angle α of camera, make the imaging of people's face can be in the vertical centred position of images acquired and people's face is adjusted to the horizontal center of images acquired and make the user keep good shooting attitude by the video unit feedback; Thereby make system can gather the facial image of higher image quality.
Description of drawings
Fig. 1 is the structured flowchart of the ultrasonic unit in people's face acquisition system;
Fig. 2 is the schematic diagram that the camera angle of pitch is adjusted in the embodiment of the invention;
Fig. 3 is the structured flowchart of the collecting unit in people's face acquisition system;
Fig. 4 is the front elevation of the audio frequency and video interactive unit in the embodiment of the invention;
Fig. 5 is ultrasonic ranging unit, collecting unit, the audio frequency and video interactive unit combination synoptic diagram in the embodiment of the invention;
Fig. 6 is the structural representation of the autonomous type luffing mechanism in the embodiment of the invention.
Embodiment
Below in conjunction with description of drawings embodiments of the invention are described in further detail, but present embodiment is not limited to the present invention, every employing analog structure of the present invention and similar variation thereof all should be listed protection scope of the present invention in.
A kind of self-aid man face image acquiring system that is somebody's turn to do based on ultrasonic ranging provided by the present invention be divided into four parts: ultrasonic ranging unit, collecting unit, audio frequency and video interactive unit, autonomous type luffing mechanism:
1) ultrasonic ranging unit
Form by supersonic range finder, ultrasound wave height measuring device.Supersonic range finder mainly is the distance that is used to survey between user and the camera, and with the parallel sustained height place, liquid crystal display below that is positioned in the audio frequency and video interactive unit of camera, system will move according to the distance value guiding user that this device is surveyed; The ultrasound wave height measuring device is mainly used in surveys the user crown and the distance between it to survey user's height, instructs camera to do corresponding luffing angle adjustment, makes camera can aim at people's face center, and it is positioned over directly over the best standing place of imaging.As shown in Figure 1, described ultrasonic unit (comprising supersonic range finder and ultrasound wave height measuring device) ultrasonic transmission device, ultrasonic probe, ultrasonic receiver and the temperature compensation etc. that are connected signal processor by the microprocessor of signal processor, control signal processor, are respectively partly formed; The narrow ripple of electric pulse by microprocessor control signal processor output certain frequency, remove to drive the ultrasound wave that ultrasonic transmission device is launched this frequency, when running into barrier, this ultrasound wave reflects, receive by ultrasonic probe, ultrasonic receiver, after signal processor processes, draw the distance value between this device and the barrier, according to this distance value, microprocessor will be made the control corresponding action.As shown in Figure 2, camera angle of pitch α is calculated as follows: the horizontal range between supersonic range finder 1 and the user is L1, distance between the ultrasound wave height measuring device 2 and the user crown is L2, distance between ultrasound wave height measuring device 2 and the ground is H1, distance between camera and the ground is H2, then tan α=(H1-H2-L2)/L1.
2) collecting unit
Be made up of highly sensitive camera, two-way video line and video frequency collection card, camera adopts the CCD camera, and adopts long tight shot, and focusing is from about 500mm.As shown in Figure 3, the vision signal of CCD camera is divided the two-way transmission, and the capture card of leading up to is transferred to the Flame Image Process main frame, and another road is transferred to the audio frequency and video interactive unit and directly shows for liquid crystal display.
3) audio frequency and video interactive unit
The high brightness liquid crystal display and the voice-output device that are not less than the 640*480 pixel by a chip resolution are formed.
As shown in Figure 4, camera 7 is placed on the below of liquid crystal display, voice-output device 5 places the top of liquid crystal display, at first user and the distance between the camera that detects according to the supersonic range finder in the ultrasonic ranging unit carried out voice suggestion to the user, when detect that the user has entered in people's face shooting area and certain time after just point out the user to enter people's face collecting flowchart, and the guiding user moves forward or backward, when camera is adjusted to corresponding shooting angle after the user moves to optimum photographing position and detecting user's height, system lights liquid crystal display, the positive center of this liquid crystal display has a guiding user to carry out the square view-finder 6 that people's face is gathered, and can show the human face image sequence that collecting unit photographs in real time, its refresh rate was not less than for 30 frame/seconds, so that the user carries out trickle adjustment according to the sharpness and the observed human face posture of liquid crystal display image, guarantee to collect high-quality facial image.
4) autonomous type luffing mechanism
As shown in Figure 6, the CCD camera in the collecting unit is installed on the luffing mechanism as autonomous type collecting device main body.The luffing angle of this mechanism is 0 ~ 30 degree, apart from floor level 1500mm, the user's height that detects according to the ultrasound wave height measuring device in the ultrasonic ranging unit, predict people's face height, and the user that detects of supersonic range finder and the distance between the camera, the adjustment luffing angle that the collecting device main body is can be under the drive of the stepper motor 10 that is connected with the luffing mechanism gear autonomous, to adapt to the user of 1.5 ~ 1.8 meters of heights, underwriter's face is in the images acquired vertical centred position all the time.Supersonic range finder in voice-output device in this luffing mechanism and the audio frequency and video interactive unit and liquid crystal display and the ultrasonic ranging unit is integrated, constitutes the self-aid man face acquisition system and is installed in together on the flat board, and this flat board embeds in the wall.
As shown in Figure 5, supersonic range finder 1 and ultrasound wave height measuring device 2 are with L1 and L2 difference input microprocessor, calculate angle of pitch α adjusts camera through the microprocessor driven stepper motor luffing angle by tan α=(H1-H2-L2)/L1, be the angle α of liquid crystal display primary optical axis 8 and camera primary optical axis 9, make user people's face can be imaged on the vertical centred position of liquid crystal display.
A kind of man face image acquiring flow process provided by the present invention based on ultrasonic ranging, its step is as follows:
A) user walks person of modern times's face collecting device, and supersonic range finder 1 measures and after the user enters people's face pickup area the user carried out voice guide, and it moves forward and backward by voice suggestion according to the residing position of user, makes it be in the optimum position of people's face imaging;
B) when subscriber station behind a certain fixed position, light liquid crystal display, ultrasound wave height measuring device 2 begins to measure user's height, and according to the distance between the user's height that measures and user and the camera, by tan α=(H1-H2-L2)/L1, automatically adjust the luffing angle α of camera, make user people's face can be imaged on the vertical centred position of liquid crystal display images acquired;
C) liquid crystal display shows the image that photographs in real time, feedback people's face residing position and attitude in image, and by these information, the user adjusts the shooting attitude automatically, allows human face posture ajust and be in the image level center get final product;
D) this image is imported main frame by the video frequency collection card collection in the image host machine simultaneously, and the detected image quality is independently gathered in image host machine;
E) behind man face image acquiring and treated the finishing, sounding prompting user people's face collection and identifying finish.
Claims (2)
1. self-aid man face image acquiring system based on ultrasonic ranging, comprise: a collecting unit, Flame Image Process main frame by camera, the capture card that connects camera, connection capture card is formed with the display screen that equally also is connected camera, and camera is arranged at the display screen below; It is characterized in that, also comprise:
One ultrasonic ranging unit, by the supersonic range finder that is used to measure distance between user and the camera and the ultrasound wave height measuring device that is used to measure user's height form, the parallel sustained height place, display screen below that is arranged at of supersonic range finder and camera, system will move forward and backward according to the distance value of this measurement device guiding user, the ultrasound wave height measuring device be arranged at the best standing place of user directly over;
One audio frequency and video interactive unit is arranged at the voice-output device of display screen top, is used to the voice suggestion that guides the user to move forward and backward;
One autonomous type luffing mechanism; Be provided with and drive the stepper motor that camera is adjusted luffing angle, can control the adjustment that camera is made corresponding luffing angle, make camera can aim at user people's face center; Camera angle of pitch α is calculated as follows: tan α=(H1-H2-L2)/L1, wherein, H1 is the distance between ultrasound wave height measuring device and the ground, H2 is that the distance between camera and the ground is, L2 is the distance between the ultrasound wave height measuring device and the user crown, and L1 is the horizontal range between supersonic range finder and the user.
2. the self-aid man face image acquiring system based on ultrasonic ranging according to claim 1 is characterized in that, described display screen is CRT, liquid crystal display, PDP display.
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009155791A1 (en) * | 2008-06-25 | 2009-12-30 | 汉王科技股份有限公司 | Inclined image capture device and facial recognition system |
| CN100582654C (en) * | 2008-09-25 | 2010-01-20 | 广州广电运通金融电子股份有限公司 | Height measuring method and its measuring device |
| CN102256055A (en) * | 2011-04-26 | 2011-11-23 | 杭州华银视讯科技有限公司 | Shooting system and shooting method |
| CN102375979A (en) * | 2010-08-23 | 2012-03-14 | 北京汉林信通信息技术有限公司 | Intelligent portrait acquisition equipment and method |
| CN104434113A (en) * | 2014-12-01 | 2015-03-25 | 江西洪都航空工业集团有限责任公司 | Stature measuring method |
| CN104534996A (en) * | 2014-12-31 | 2015-04-22 | 苏州江奥光电科技有限公司 | Measuring equipment based on absolute liquid crystal ruler |
| CN107170091A (en) * | 2017-05-16 | 2017-09-15 | 南通金亿达门业有限公司 | A kind of antitheft door based on face recognition technology |
| CN107705164A (en) * | 2017-11-14 | 2018-02-16 | 宜宾维特瑞安科技有限公司 | A kind of market survey device, system and method based on eyeball tracking technology |
| CN108447159A (en) * | 2018-03-28 | 2018-08-24 | 百度在线网络技术（北京）有限公司 | Man face image acquiring method, apparatus and access management system |
| CN109091118A (en) * | 2017-06-21 | 2018-12-28 | 深圳大森智能科技有限公司 | A kind of sign data monitoring system, monitoring method and terminal |
| CN109218587A (en) * | 2018-10-29 | 2019-01-15 | 咪付（广西）网络技术有限公司 | A kind of image-pickup method and system based on binocular camera |
| CN109284686A (en) * | 2018-08-23 | 2019-01-29 | 国网山西省电力公司计量中心 | A kind of label identification method that camera automatic pitching is taken pictures |
| CN109658570A (en) * | 2018-12-19 | 2019-04-19 | 中新智擎科技有限公司 | A kind of server, client, mobile robot, door access control system and method |
| CN109887201A (en) * | 2019-03-05 | 2019-06-14 | 王晓霞 | A kind of unmanned supermarket automatic cash register face payment system |
| CN110097677A (en) * | 2019-06-13 | 2019-08-06 | 深圳市凯迪仕智能科技有限公司 | It is a kind of without screen Intelligent door lock capable of recognizing face and its recognition methods |
| CN111462384A (en) * | 2020-04-29 | 2020-07-28 | 杭州电子科技大学 | Small-sized access control system based on raspberry group and embedded system |
| CN111251307B (en) * | 2020-03-24 | 2021-11-02 | 北京海益同展信息科技有限公司 | Voice acquisition method and device applied to robot and robot |
| CN114120386A (en) * | 2020-08-31 | 2022-03-01 | 腾讯科技（深圳）有限公司 | Face recognition method, device, equipment and storage medium |
| CN114495367A (en) * | 2021-12-28 | 2022-05-13 | 成都美透科技有限公司 | Block chain based medical and American user service prompting method, device and system |
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2005
- 2005-04-28 CN CN 200510025500 patent/CN1687956A/en active Pending
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009155791A1 (en) * | 2008-06-25 | 2009-12-30 | 汉王科技股份有限公司 | Inclined image capture device and facial recognition system |
| CN100582654C (en) * | 2008-09-25 | 2010-01-20 | 广州广电运通金融电子股份有限公司 | Height measuring method and its measuring device |
| CN102375979A (en) * | 2010-08-23 | 2012-03-14 | 北京汉林信通信息技术有限公司 | Intelligent portrait acquisition equipment and method |
| CN102256055A (en) * | 2011-04-26 | 2011-11-23 | 杭州华银视讯科技有限公司 | Shooting system and shooting method |
| CN104434113A (en) * | 2014-12-01 | 2015-03-25 | 江西洪都航空工业集团有限责任公司 | Stature measuring method |
| CN104534996A (en) * | 2014-12-31 | 2015-04-22 | 苏州江奥光电科技有限公司 | Measuring equipment based on absolute liquid crystal ruler |
| CN107170091A (en) * | 2017-05-16 | 2017-09-15 | 南通金亿达门业有限公司 | A kind of antitheft door based on face recognition technology |
| CN109091118A (en) * | 2017-06-21 | 2018-12-28 | 深圳大森智能科技有限公司 | A kind of sign data monitoring system, monitoring method and terminal |
| CN107705164A (en) * | 2017-11-14 | 2018-02-16 | 宜宾维特瑞安科技有限公司 | A kind of market survey device, system and method based on eyeball tracking technology |
| CN108447159B (en) * | 2018-03-28 | 2020-12-18 | 百度在线网络技术（北京）有限公司 | Face image acquisition method and device and entrance and exit management system |
| CN108447159A (en) * | 2018-03-28 | 2018-08-24 | 百度在线网络技术（北京）有限公司 | Man face image acquiring method, apparatus and access management system |
| CN109284686A (en) * | 2018-08-23 | 2019-01-29 | 国网山西省电力公司计量中心 | A kind of label identification method that camera automatic pitching is taken pictures |
| CN109218587A (en) * | 2018-10-29 | 2019-01-15 | 咪付（广西）网络技术有限公司 | A kind of image-pickup method and system based on binocular camera |
| CN109658570A (en) * | 2018-12-19 | 2019-04-19 | 中新智擎科技有限公司 | A kind of server, client, mobile robot, door access control system and method |
| CN109887201A (en) * | 2019-03-05 | 2019-06-14 | 王晓霞 | A kind of unmanned supermarket automatic cash register face payment system |
| CN109887201B (en) * | 2019-03-05 | 2021-10-08 | 江苏中创供应链服务有限公司 | Face payment system for automatic cash registering of unmanned supermarket |
| CN110097677A (en) * | 2019-06-13 | 2019-08-06 | 深圳市凯迪仕智能科技有限公司 | It is a kind of without screen Intelligent door lock capable of recognizing face and its recognition methods |
| CN111251307B (en) * | 2020-03-24 | 2021-11-02 | 北京海益同展信息科技有限公司 | Voice acquisition method and device applied to robot and robot |
| CN111462384A (en) * | 2020-04-29 | 2020-07-28 | 杭州电子科技大学 | Small-sized access control system based on raspberry group and embedded system |
| CN114120386A (en) * | 2020-08-31 | 2022-03-01 | 腾讯科技（深圳）有限公司 | Face recognition method, device, equipment and storage medium |
| CN114495367A (en) * | 2021-12-28 | 2022-05-13 | 成都美透科技有限公司 | Block chain based medical and American user service prompting method, device and system |
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