CN201218952Y - Slope type image acquisition apparatus and human face recognition system using the same - Google Patents
Slope type image acquisition apparatus and human face recognition system using the same Download PDFInfo
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- CN201218952Y CN201218952Y CNU2008201088147U CN200820108814U CN201218952Y CN 201218952 Y CN201218952 Y CN 201218952Y CN U2008201088147 U CNU2008201088147 U CN U2008201088147U CN 200820108814 U CN200820108814 U CN 200820108814U CN 201218952 Y CN201218952 Y CN 201218952Y
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Abstract
The utility model provides a sloped image acquisition device comprising a sloped device and a camera head wherein the sloped device has an interface having a slope angle to the horizontal plane and the camera head is fixed on the interface with the axial direction being slant upward. In addition, the utility model provides a face identification system of image acquisition device, comprising a sloped image acquisition device, a face identification unit and output device, wherein the sloped image acquisition device comprises a sloped device and a camera head and the sloped device has an interface having a slope angle to the horizontal plane and the camera head is fixed on the interface with the axial direction being slant upward. The face identification unit is electrically connected with the sloped image acquisition device and used for receiving the obtained face image and identifying the face on the received image and the output device is used for outputting the identification result of the face identification unit.
Description
Technical field
The utility model relates to living things feature recognition and technical field of image acquisition, and particularly a kind of face identification device relates in particular to a kind of slope image acquisition device and the face identification system that uses this device.
Background technology
Biometrics identification technology is listed in 21 century human society is brought one of revolution sex ten big technology.Biometrics identification technology is the most convenient, safe at present identity recognizing technology, and that biometrics identification technology is discerned is people itself, does not need the marker outside the person.Biometrics identification technology utilizes people's physiological characteristic and behavioural characteristic to carry out identification, mainly contains fingerprint recognition, recognition of face, iris recognition, Gait Recognition etc.Wherein, recognition of face is a big focus in current living things feature recognition field.It is compared with the fingerprint identification technology of present widespread use, and remarkable advantages such as intuitive, convenience, untouchable, friendly, user's acceptance height are arranged.
The quality of considering the quality of human face image of collection can directly have influence on recognition performance, and the camera that therefore is used for recognition of face generally requires the distortion of camera lens little, the vertical angle of view is between 30 ° to 50 °.But in actual applications, if the camera axis in the face identification system is fixed on horizontal direction, the user of generally only suitable standard heights (height difference scope is about 20-30 centimetre), higher or the short partially certain customers for height, the image of gathering almost can't carry out recognition of face, as shown in Figure 1.Therefore, the height problem becomes restraining factors of present face identification system, has a strong impact on the untouchable good user's impression of recognition of face.
The patent No. is " ZL 200620056518.8 " " locating surface is as recognition device automatically ", has proposed a kind of Electric Machine Control of passing through, the position and the direction of regulating camera automatically, a kind of method of the height problem of solution recognition of face.But obviously there are two defectives in this patent, the one, and system is too complicated, and stability, the reliability of motor and governor motion are relatively poor, and the 2nd, cost is higher, is not suitable for large-scale application.
The utility model content
At the problems referred to above, the utility model proposes a kind of slope image acquisition device and use the face identification system of this device, can increase suitable height difference scope effectively.
According to an aspect of the present utility model, a kind of slope image acquisition device is provided, described device comprises slope device and camera, and described slope device has the interface that becomes certain ramp angles with surface level, axially being fixed on obliquely on the described interface of described camera.Described ramp angles is preferably 53 ° between 45 ° to 60 °.Described camera be axially perpendicular to described layout setting.
According to another aspect of the present utility model, a kind of face identification system is provided, described system comprises slope image acquisition device, face identification unit and output unit, described slope image acquisition device comprises slope device and camera, described slope device has the interface that becomes certain ramp angles with surface level, axially being fixed on obliquely on the described interface of described camera; Described face identification unit links to each other by being electrically connected with described slope image acquisition device, is used to receive the facial image that obtained and the image that is received is carried out recognition of face; Described output unit is used to export the recognition result of face identification unit.
Description of drawings
Below in conjunction with drawings and embodiments the utility model is further specified.
Fig. 1 is the synoptic diagram of the height difference scope of traditional, as to use rectilinear image acquiring device face identification system;
Fig. 2 is the synoptic diagram according to the height difference scope of the slope image acquisition device of embodiment of the present utility model;
Fig. 3 is the schematic diagram of the face identification system of use slope image acquisition device;
Fig. 4 is the synoptic diagram according to the body of wall embedded type ramp type face identification device of embodiment of the present utility model;
Fig. 5 is the synoptic diagram according to the cabinet-type air conditioner type ramp type face identification device of embodiment of the present utility model;
Fig. 6 is the front appearance synoptic diagram according to ramp type face identification device of the present utility model.
Embodiment
Fig. 1 is the synoptic diagram of the height difference scope of the rectilinear image acquiring device that uses in traditional face identification system.In this image acquiring device, the axial along continuous straight runs of camera is placed, and the vertical angle of view of establishing camera is A, and axial distance is L, and the height of people's face is 30 centimetres, so this image acquiring device height difference scope H that can be suitable for can be expressed as (centimetre):
H＝H1-H2＝2*L*tan(A/2)-30 (1)
Can know that according to above-mentioned formula (1) when vertical angle of view A was 40 °, when axial distance L equaled 60,70 and 80 centimetres, the height difference scope H that image acquiring device can be suitable for was respectively 13,20 and 28 centimetres.
As can be seen, even when axial distance is 80 centimetres, the height difference scope that image acquiring device can be suitable for also just reaches 28 centimetres, the needs of the height difference scope that very difficult adaptation is bigger.Increase axial distance and can obtain bigger height difference scope, after but axial distance increases, for the object of bodice discrepancy in elevation scope is more discerned, object to be identified just need stand in apart from the farther position of camera, and this will have a strong impact on the sampling quality of facial image.Therefore, in general axial distance is preferably between 50-80 centimetre.
Fig. 2 is the height difference scope synoptic diagram according to the slope image acquisition device of embodiment of the present utility model.The image acquiring device of present embodiment comprises slope device and camera, described slope device has the interface that becomes certain ramp angles with surface level, if the ramp angles of slope device is B, make axially being fixed on obliquely on the described interface of camera, with the angle of surface level be the 90-B degree.The vertical angle of view of still establishing camera is A, and axial distance is L, and the height of people's face is 30 centimetres, so the slope image acquisition device height difference scope H that can be suitable for can be expressed as (centimetre):
H＝H1-H2＝2*L*tan(A/2)-30+sin(B)*[2*L*tan(A/2)-30] (2)
Know according to above-mentioned formula (2), when vertical angle of view A be 40 °, when ramp angles is 53 °, when axial distance L equaled 60,70 and 80 centimetres, the height difference scope H that slope image acquisition device can be suitable for was respectively 23,36 and 50 centimetres.
In the present embodiment, what ramp angles was chosen is 53 °, yet will be appreciated that being suitable for gathering in the scope of people's face direct picture, can choose ramp angles arbitrarily.In general, ramp angles can be between 45 ° to 60 °, but in the utility model, pass through in conjunction with ergonomics, infrared technique, shooting image-forming principle and face recognition technology, through experiment repeatedly, final determine that ramp angles is preferably 53 °, this had not only met the attitude angle that the human body natural bows but also had farthest increased the Image Acquisition scope.
In the present embodiment, what the vertical angle of view was chosen is 40 °, yet will be appreciated that the vertical angle of view between 0-40 ° all can realize the utility model.
In addition, the manufacturing materials of described slope device can be chosen as unlike materials such as plastics, metal.
Fig. 3 is the schematic diagram of the face identification system of use slope image acquisition device.Face identification system of the present utility model can also can embedded platform, for example DSP, Strong-Arm, ASP etc. based on the PC platform.This face identification system comprises slope image acquisition device 301, face identification unit 303 and output unit 305.Described slope image acquisition device 301 comprises slope device and camera, and described slope device has and becomes certain ramp angles with surface level, 53 ° interface for example, axially being fixed on obliquely on the described interface of described camera.Face identification unit 303 links to each other by being electrically connected with described slope image acquisition device 301, and the facial image that is used for being obtained by image acquiring device 301 sends face identification unit 303 to.303 pairs of images that received of face identification unit carry out recognition of face, and recognition result is returned to output unit 305, and for example display screen shows recognition result by output unit 305.
Fig. 4 is the synoptic diagram according to the body of wall embedded type ramp type face identification device of embodiment of the present utility model.
As shown in the figure, ramp type face identification device of the present utility model can be implemented in the mode that embeds body of wall.The slope device of described slope image acquisition device 401 can be arranged on outside the body of wall, has the interface that becomes certain ramp angles with surface level, axially being fixed on obliquely on the described interface of camera is so that make the scope of obtaining of camera not be subjected to stopping of body of wall.And described face identification unit 403 can be arranged in the body of wall.Described slope image acquisition device 401 links to each other by being electrically connected with face identification unit 403, sends face identification unit 403 to the image that will be obtained, and receives the recognition result that is sent by face identification unit 403.
Fig. 5 is the synoptic diagram according to the cabinet-type air conditioner type ramp type face identification device of embodiment of the present utility model.
As shown in the figure, ramp type face identification device of the present utility model can be implemented with the form of cabinet-type air conditioner.Described cabinet-type air conditioner 500 comprises slope image acquisition device 501 and face identification unit 503, and the slope device of described slope image acquisition device 501 has the interface that becomes certain ramp angles with surface level, axially being fixed on obliquely on the described interface of camera.Described slope image acquisition device 501 links to each other by being electrically connected with face identification unit 503, sends face identification unit 503 to the image that will be obtained, and receives the recognition result that is sent by face identification unit 503.
Fig. 6 is the front appearance synoptic diagram according to ramp type face identification device of the present utility model.Described device comprises slope image acquisition device, screen area, keyboard region, the district etc. that swipes the card, and wherein, camera is arranged on the bottom of slope device, so that the height that described recognition device is installed is higher.
The utility model adopts a kind of face identification device of ramp type, increased height difference scope greatly, solved the height problem of recognition of face, can be general common camera, the height difference scope that is fit to recognition of face can be increased to 50 centimetres, satisfies most users of 1.45 meters to 1.95 meters.In addition, according to installing the height difference of installing, not only can satisfy the crowd of normal height, even if the special pipsqueak group of stature, such as 1.2 meters to 1.5 meters crowd, and the tall and big especially crowd of stature, such as 1.85 meters to 2.20 meters crowd, also can use according to this device is normal.Therefore, the utility model almost can satisfy all users' needs, and has high convenience, well user's impression.
Claims (10)
1. a slope image acquisition device is characterized in that, described device comprises slope device and camera, and described slope device has the interface that becomes certain ramp angles with surface level, axially being fixed on obliquely on the described interface of described camera.
2. image acquiring device according to claim 1 is characterized in that, described ramp angles is between 45 ° to 60 °.
3. image acquiring device according to claim 2 is characterized in that, described ramp angles is 53 °.
4. image acquiring device according to claim 1 and 2 is characterized in that, described camera be axially perpendicular to described interface.
5. a face identification system is characterized in that, described system comprises slope image acquisition device, face identification unit and output unit,
Described slope image acquisition device comprises slope device and camera, and described slope device has the interface that becomes certain ramp angles with surface level, axially being fixed on obliquely on the described interface of described camera;
Described face identification unit links to each other by being electrically connected with described slope image acquisition device, is used to receive the facial image that obtained and the image that is received is carried out recognition of face;
Described output unit is used to export the recognition result of face identification unit.
6. face identification system according to claim 5 is characterized in that, the ramp angles of described slope device is between 45 ° to 60 °.
7. face identification system according to claim 6 is characterized in that, the ramp angles of described slope device is 53 °.
8. according to claim 5 or 6 described face identification systems, it is characterized in that, described camera be axially perpendicular to described interface.
9. face identification system according to claim 5 is characterized in that described face identification system is based on the PC platform.
10. face identification system according to claim 5 is characterized in that described face identification system is based on embedded platform.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201088147U CN201218952Y (en) | 2008-06-25 | 2008-06-25 | Slope type image acquisition apparatus and human face recognition system using the same |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2008201088147U CN201218952Y (en) | 2008-06-25 | 2008-06-25 | Slope type image acquisition apparatus and human face recognition system using the same |
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| CN201218952Y true CN201218952Y (en) | 2009-04-08 |
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Cited By (1)
| 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 |
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2008
- 2008-06-25 CN CNU2008201088147U patent/CN201218952Y/en not_active Expired - Lifetime
Cited By (1)
| 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 |
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