CN103870812A - Method and system for acquiring palmprint image - Google Patents
Method and system for acquiring palmprint image Download PDFInfo
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- CN103870812A CN103870812A CN201410092658.XA CN201410092658A CN103870812A CN 103870812 A CN103870812 A CN 103870812A CN 201410092658 A CN201410092658 A CN 201410092658A CN 103870812 A CN103870812 A CN 103870812A
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Abstract
The invention discloses a palmprint image acquisition method and a palmprint image acquisition system for palmprint identification. The method comprises the steps of acquiring a palmprint image of a user through a photographing device; prompting the user to adjust the position of a palm of the user so as to enable the palmprint image acquired by the photographing device to meet a requirement on the palmprint image quality. According to the method, the palmprint image acquired by the photographing device is enabled to meet the requirement on the palmprint image quality by prompting the user to adjust the position of the palm, so that the quality of the palmprint image acquired by a non-contact palmprint identification technology is improved.
Description
Technical field
The present invention relates to biological identification technology, relate in particular to a kind of method and system of obtaining palmprint image.
Background technology
Due to features such as stability, uniqueness and the convenience of biological characteristic, carry out authentication using biological identification technology as means and replace gradually the identification mode traditional such as key, password etc.Biological identification technology refers to some biological characteristics that utilize human body, such as face, iris, fingerprint, palmmprint, hand shape etc., carry out the technology of identification, it mainly comprises: gather image, from the image gathering, extract biological information, subsequently extracted characteristic information is mated with the characteristic information of all or part registered in advance in database, according to matching result, this authenticatee is carried out to authentication.
Wherein, there is contactless palmmprint recognition technology in prior art, and it utilizes camera head to obtain palmprint image, and from this palmprint image, obtain palm print characteristics information to be matched.The quality of the palmprint image obtaining is most important to palmmprint recognition technology, accuracy and the accuracy of palmmprint recognition technology are determined to a great extent, and such as utilizing camera head to obtain the contactless palmmprint recognition technology of palmprint image, owing to being different from traditional contact palmprint image obtain manner, the not stationary installation to palm of contactless palmmprint recognition technology, cause putting of user's palm too random, the palmprint image mass ratio that utilizes camera head to obtain is lower.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of method and system of obtaining palmprint image, to solve the lower problem of palmprint image mass ratio that in prior art, contactless palmmprint recognition technology is obtained.
According to an aspect of the present invention, provide a kind of palmprint image acquisition methods for palmmprint identification, comprising:
Obtain user's palmprint image by camera head;
Prompting user adjusts user's palm position, makes the palmprint image obtaining by described camera head meet palmprint image quality requirements.
According to another aspect of the present invention, also provide a kind of palmprint image for palmmprint identification to obtain system, having comprised:
Image acquiring device, for obtaining user's palmprint image by camera head;
Suggestion device, for the palm position of pointing out user to adjust user, makes the palmprint image obtaining by described camera head meet palmprint image quality requirements.
The present invention adjusts palm position by prompting user, makes the palmprint image obtaining by camera head meet palmprint image quality requirements, has improved the palmprint image quality that contactless palmmprint recognition technology is obtained.
Brief description of the drawings
By reading the detailed description that non-limiting example is done of doing with reference to the following drawings, it is more obvious that other features, objects and advantages of the present invention will become:
Fig. 1 is a kind of according to an embodiment of the invention process flow diagram of the palmprint image acquisition methods for palmmprint identification;
Fig. 2 is that a kind of according to an embodiment of the invention palmprint image for palmmprint identification obtains system schematic.
In accompanying drawing, same or analogous Reference numeral represents same or analogous parts.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
In the present invention, the network equipment comprise a kind of can be according to the instruction of prior setting or storage, automatically carry out the electronic equipment of numerical evaluation and information processing, its hardware includes but not limited to microprocessor, special IC (ASIC), programmable gate array (FPGA), digital processing unit (DSP), embedded device etc.It includes but not limited to the cloud that computing machine, network host, single network server, multiple webserver collection or multiple server form the described network equipment; At this, cloud is made up of a large amount of computing machines based on cloud computing (CloudComputing) or the webserver, and wherein, cloud computing is the one of Distributed Calculation, the virtual supercomputer being made up of the loosely-coupled computing machine collection of a group.It includes but not limited to any mobile electronic product that can carry out with user man-machine interaction by keyboard, touch pad or voice-operated device described subscriber equipment, for example smart mobile phone, notebook computer, vehicle-mounted computer, PDA(palm PC, PersonalDigitalAssistant).Described network includes but not limited to internet, wide area network, Metropolitan Area Network (MAN), LAN (Local Area Network), VPN network, wireless self-organization network (AdHoc network) etc.Those skilled in the art will be understood that other subscriber equipment, the network equipment, network, as applicable to the present invention, also should be included in protection domain of the present invention, and be contained in this at this with way of reference.
Fig. 1 shows a kind of according to an embodiment of the invention palmprint image acquisition methods process flow diagram for palmmprint identification.
As shown in Figure 1, in step S101, obtain user's palmprint image by camera head.
Wherein, described camera head can be the camera head carrying for the equipment of palmmprint identification, and preferably, the described equipment for palmmprint identification can be subscriber equipment or the network equipment; Described camera head can be also independent camera head, obtains after user's palmprint image at independent camera head, and obtained palmprint image is transferred to the equipment for palmmprint identification.
Alternatively, can obtain by camera head user's one or more palmprint image.
Alternatively, can, in the time meeting pre-defined rule, open the light source of camera head, obtain subsequently user's palmprint image by this camera head.
Wherein, described pre-defined rule can comprise with the next item down:
A) in the time opening this camera head and prepare to obtain user's palmprint image, acquiescence is opened the light source of this camera head;
B) by the light of testing environment, judge whether to open the light source of this camera head, in the time that the light of environment meets the condition that needs to open light source, open the light source of this camera head.For example, the parameter that the condition of setting unlatching light source is ambient light, for example brightness, is less than predetermined parameter threshold etc.
In step S102, prompting user adjusts user's palm position, makes the palmprint image obtaining by described camera head meet palmprint image quality requirements.
Particularly, adjust user's palm position for the device prompts user of palmmprint identification, obtain user by camera head subsequently and adjust the palmprint image behind palm position according to described prompting, whether the palmprint image behind the adjustment palm position that judgement is obtained meets palmprint image quality requirements.In the time that the palmprint image behind obtained adjustment palm position does not meet described palmprint image quality requirements, carry out the step of pointing out user to adjust user's palm position.Wherein, the palmprint image that obtains user by camera head is a continual process, in the time that the palmprint image behind obtained adjustment palm position does not meet described palmprint image quality requirements, prompting user adjusts user's palm position, adjust in the process of palm position user, camera head is also at the palmprint image that obtains constantly this user.Alternatively, in the time that the palmprint image behind obtained adjustment palm position meets described palmprint image quality requirements, preserve this palmprint image.
Wherein, the concrete mode that prompting user adjusts user's palm position can be: by least one mode in voice, image, word, and the palm position of pointing out user to adjust user.Particularly, can on this device screen for palmmprint identification, adopt the mode display reminding information of image or word for the equipment of palmmprint identification, or adopt the mode of voice to provide information to user.
It will be appreciated by those skilled in the art that; above-mentioned prompting user adjusts the mode of palm position only for giving an example; other prompting user adjusts the mode of palm position as applicable to the present invention, also should be included in protection domain of the present invention, and be contained in this with way of reference.
Wherein, for pointing out the information of the palm position that user adjusts user to include but not limited at least following a kind of information:
A) distance between adjustment user's palm and camera head;
B) adjust user's palm in the position in image-region that obtains of camera head, particularly, include but not limited to by palm up and down all directions such as left and right move;
C) upset user's palm, particularly, can be by detecting the main line in the palm centre of the palm, judge that obtaining in image-region of camera head is the palm centre of the palm or the palm palm back of the body, when the main line in the palm centre of the palm not detected, judge that obtaining in image-region of camera head is the palm palm back of the body, the palm of pointing out user to overturn user, makes user's palm be presented on obtaining in image-region of camera head.
It will be appreciated by those skilled in the art that; above-mentioned is only for example for pointing out the information that user adjusts palm position; other for pointing out information that user adjusts palm position as applicable to the present invention, also should be included in protection domain of the present invention, and be contained in this with way of reference.
Wherein, palmprint image quality requirements comprise following at least one:
A) sharpness of palmprint image;
B) palm area is full of the image-region that obtains of described camera head;
C) obtaining of described camera head comprises palm thumb web in image-region;
D) obtaining of described camera head comprises four fingers of palm except thumb in image-region and refers to root;
E) number percent that the palm area in palmprint image accounts for described palmprint image reaches predetermined percentage, wherein, described predetermined percentage can be determined according to the required palmmprint accuracy of identification reaching of practical application request, for example, the palm area in palmprint image at least can be accounted for to 50% of described palmprint image.It will be understood by those skilled in the art that described predetermined percentage is only for giving an example, other predetermined percentage, as applicable to the present invention, also should be included in protection domain of the present invention, and are contained in this with way of reference.Particularly, can adopt Face Detection to distinguish palm area and background area, extract palm area, account for the number percent of described palmprint image to add up palm area in palmprint image.
It will be understood by those skilled in the art that above-mentioned palmprint image quality requirements is only for giving an example, other palmprint image quality requirements, as applicable to the present invention, also should be included in protection domain of the present invention, and is contained in this with way of reference.
The present embodiment can be applicable to contactless palmmprint recognition technology, in contactless palmmprint recognition technology, obtain user's palmprint image by camera head, and do not there is the stationary installation of fixed-line subscriber palm, the present invention adjusts palm position by prompting user, make the palmprint image obtaining by camera head meet palmprint image quality requirements, improved the palmprint image quality that contactless palmmprint recognition technology is obtained.
Fig. 2 shows a kind of according to an embodiment of the invention palmprint image for palmmprint identification and obtains the schematic diagram of system.This palmprint image that is used for palmmprint identification obtains system and comprises: image acquiring device 201 and suggestion device 202.
Wherein, described image acquiring device 201, for obtaining user's palmprint image by camera head.
Wherein, described camera head can be the camera head carrying for the equipment of palmmprint identification, and preferably, the described equipment for palmmprint identification can be subscriber equipment or the network equipment; Described camera head can be also independent camera head, obtains after user's palmprint image at independent camera head, and obtained palmprint image is transferred to the equipment for palmmprint identification.
Alternatively, can obtain by camera head user's one or more palmprint image.
Alternatively, can, in the time meeting pre-defined rule, open the light source of camera head, obtain subsequently user's palmprint image by this camera head.
Wherein, described pre-defined rule can comprise with the next item down:
A) in the time opening this camera head and prepare to obtain user's palmprint image, acquiescence is opened the light source of this camera head;
B) by the light of testing environment, judge whether to open the light source of this camera head, in the time that the light of environment meets the condition that needs to open light source, open the light source of this camera head.For example, the parameter that the condition of setting unlatching light source is ambient light, for example brightness, is less than predetermined parameter threshold etc.
Described suggestion device 202, for the palm position of pointing out user to adjust user, makes the palmprint image obtaining by described camera head meet palmprint image quality requirements.
Particularly, described suggestion device 202 comprises:
The first reminding module (not shown), for the palm position of pointing out user to adjust user;
Judge module (not shown), for judging whether the palmprint image behind obtained adjustment palm position meets palmprint image quality requirements, in the time that the palmprint image behind obtained adjustment palm position does not meet described palmprint image quality requirements, notify described the first reminding module prompting user to adjust user's palm position;
Wherein, described image acquiring device 201 comprises image collection module (not shown), adjusts the palmprint image behind palm position for obtain user by camera head according to described prompting.
Wherein, the palmprint image that obtains user by camera head is a continual process, in the time that the palmprint image behind obtained adjustment palm position does not meet described palmprint image quality requirements, prompting user adjusts user's palm position, adjust in the process of palm position user, camera head is also at the palmprint image that obtains constantly this user.Alternatively, in the time that the palmprint image behind obtained adjustment palm position meets described palmprint image quality requirements, preserve this palmprint image.
Alternatively, described suggestion device 201 can comprise: the second reminding module (not shown), and for passing through at least one mode of voice, image, word, the palm position of pointing out user to adjust user.Particularly, the second reminding module can adopt the mode display reminding information of image or word on this device screen for palmmprint identification, or adopts the mode of voice to provide information to user.
It will be appreciated by those skilled in the art that; above-mentioned prompting user adjusts the mode of palm position only for giving an example; other prompting user adjusts the mode of palm position as applicable to the present invention, also should be included in protection domain of the present invention, and be contained in this with way of reference.
Alternatively, described suggestion device 201 can comprise: the 3rd reminding module (not shown), and the palm position for pointing out user to adjust user by least following a kind of mode:
A) prompting user adjusts the distance between user's palm and described camera head;
B) prompting user adjusts user's palm in the position in image-region that obtains of described camera head, particularly, include but not limited to by palm up and down all directions such as left and right move;
The palm of c) pointing out user to overturn user, particularly, can be by detecting the main line in the palm centre of the palm, judge that obtaining in image-region of camera head is the palm centre of the palm or the palm palm back of the body, when the main line in the palm centre of the palm not detected, judge that obtaining in image-region of camera head is the palm palm back of the body, the palm of pointing out user to overturn user, makes user's palm be presented on obtaining in image-region of camera head.
It will be appreciated by those skilled in the art that; above-mentioned is only for example for pointing out the information that user adjusts palm position; other for pointing out information that user adjusts palm position as applicable to the present invention, also should be included in protection domain of the present invention, and be contained in this with way of reference.
Wherein, palmprint image quality requirements comprise following at least one:
A) sharpness of palmprint image;
B) palm area is full of the image-region that obtains of described camera head;
C) obtaining of described camera head comprises palm thumb web in image-region;
D) obtaining of described camera head comprises four fingers of palm except thumb in image-region and refers to root;
E) number percent that the palm area in palmprint image accounts for described palmprint image reaches predetermined percentage, wherein, described predetermined percentage can be determined according to the required palmmprint accuracy of identification reaching of practical application request, for example, the palm area in palmprint image at least can be accounted for to 50% of described palmprint image.It will be understood by those skilled in the art that described predetermined percentage is only for giving an example, other predetermined percentage, as applicable to the present invention, also should be included in protection domain of the present invention, and are contained in this with way of reference.Particularly, can adopt Face Detection to distinguish palm area and background area, extract palm area, account for the number percent of described palmprint image to add up palm area in palmprint image.It will be understood by those skilled in the art that above-mentioned palmprint image quality requirements is only for giving an example, other palmprint image quality requirements, as applicable to the present invention, also should be included in protection domain of the present invention, and is contained in this with way of reference.
The present embodiment can be applicable to contactless palmmprint recognition technology, in contactless palmmprint recognition technology, obtain user's palmprint image by camera head, and do not there is the stationary installation of fixed-line subscriber palm, the present invention adjusts palm position by prompting user, make the palmprint image obtaining by camera head meet palmprint image quality requirements, improve the palmprint image that contactless palmmprint recognition technology is obtained, the present invention adjusts palm position by prompting user, make the palmprint image obtaining by camera head meet palmprint image quality requirements, improve the palmprint image quality that contactless palmmprint recognition technology is obtained.
It should be noted that the present invention can be implemented in the assembly of software and/or software and hardware, for example, each device of the present invention can adopt special IC (ASIC) or any other similar hardware device to realize.In one embodiment, software program of the present invention can carry out to realize step mentioned above or function by processor.Similarly, software program of the present invention (comprising relevant data structure) can be stored in computer readable recording medium storing program for performing, for example, and RAM storer, magnetic or CD-ROM driver or flexible plastic disc and similar devices.In addition, steps more of the present invention or function can adopt hardware to realize, for example, thereby as coordinate the circuit of carrying out each step or function with processor.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned example embodiment, and in the situation that not deviating from spirit of the present invention or essential characteristic, can realize the present invention with other concrete form.Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of above-mentioned explanation, is therefore intended to all changes that drop in the implication and the scope that are equal to important document of claim to be included in the present invention.Any Reference numeral in claim should be considered as limiting related claim.In addition, obviously other unit or step do not got rid of in " comprising " word, and odd number is not got rid of plural number.Multiple unit of stating in system claim or device also can be realized by software or hardware by a unit or device.The first, the second word such as grade is used for representing title, and does not represent any specific order.
Claims (10)
1. for a palmprint image acquisition methods for palmmprint identification, it is characterized in that, comprising:
Obtain user's palmprint image by camera head;
Prompting user adjusts user's palm position, makes the palmprint image obtaining by described camera head meet palmprint image quality requirements.
2. method according to claim 1, is characterized in that, the palmprint image that the palm position that described prompting user adjusts user makes to obtain by described camera head meets palmprint image quality requirements and comprises:
Prompting user adjusts user's palm position;
Obtain user by camera head and adjust the palmprint image behind palm position according to described prompting;
Whether the palmprint image behind the adjustment palm position that judgement is obtained meets palmprint image quality requirements;
In the time that the palmprint image behind obtained adjustment palm position does not meet described palmprint image quality requirements, carry out the step of pointing out user to adjust user's palm position.
3. method according to claim 1 and 2, is characterized in that, the palm position that described prompting user adjusts user comprises:
By at least one mode in voice, image, word, the palm position of pointing out user to adjust user.
4. method according to claim 1 and 2, is characterized in that, the palm position of pointing out user to adjust user by least following a kind of mode:
A) prompting user adjusts the distance between user's palm and described camera head;
B) prompting user adjusts user's palm in the position in image-region that obtains of described camera head;
The palm of c) pointing out user to overturn user.
5. method according to claim 1 and 2, is characterized in that, described palmprint image quality requirements comprise following at least one:
A) sharpness of palmprint image;
B) palm area is full of the image-region that obtains of described camera head;
C) obtaining of described camera head comprises palm thumb web in image-region;
D) obtaining of described camera head comprises four fingers of palm except thumb in image-region and refers to root;
E) number percent that the palm area in palmprint image accounts for described palmprint image reaches predetermined percentage.
6. obtain a system for the palmprint image of palmmprint identification, it is characterized in that, comprising:
Image acquiring device, for obtaining user's palmprint image by camera head;
Suggestion device, for the palm position of pointing out user to adjust user, makes the palmprint image obtaining by described camera head meet palmprint image quality requirements.
7. system according to claim 6, is characterized in that, described suggestion device comprises:
The first reminding module, for the palm position of pointing out user to adjust user;
Judge module, for judging whether the palmprint image behind obtained adjustment palm position meets palmprint image quality requirements, in the time that the palmprint image behind obtained adjustment palm position does not meet described palmprint image quality requirements, notify described the first reminding module prompting user to adjust user's palm position;
Wherein, described image acquiring device comprises image collection module, adjusts the palmprint image behind palm position for obtain user by camera head according to described prompting.
8. system according to claim 6, is characterized in that, described suggestion device comprises:
The second reminding module, for passing through at least one mode of voice, image, word, the palm position of pointing out user to adjust user.
9. system according to claim 6, is characterized in that, described suggestion device comprises:
The 3rd reminding module, the palm position for pointing out user to adjust user by least following a kind of mode:
A) prompting user adjusts the distance between user's palm and described camera head;
B) prompting user adjusts user's palm in the position in image-region that obtains of described camera head;
The palm of c) pointing out user to overturn user.
10. according to the system described in any one in claim 6 to 9, it is characterized in that, described palmprint image quality requirements comprise following at least one:
A) sharpness of palmprint image;
B) palm area is full of the image-region that obtains of described camera head;
C) obtaining of described camera head comprises palm thumb web in image-region;
D) obtaining of described camera head comprises four fingers of palm except thumb in image-region and refers to root;
E) number percent that the palm area in palmprint image accounts for described palmprint image reaches predetermined percentage.
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| CN201410092658.XA CN103870812A (en) | 2014-03-13 | 2014-03-13 | Method and system for acquiring palmprint image |
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| CN201410092658.XA CN103870812A (en) | 2014-03-13 | 2014-03-13 | Method and system for acquiring palmprint image |
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| CN201410092658.XA Pending CN103870812A (en) | 2014-03-13 | 2014-03-13 | Method and system for acquiring palmprint image |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3076334A1 (en) * | 2015-03-31 | 2016-10-05 | Fujitsu Limited | Image analyzing apparatus and image analyzing method |
| CN107046561A (en) * | 2016-12-29 | 2017-08-15 | 北京奇虎科技有限公司 | A kind of method and device for business processing based on palm print data |
| CN108764093A (en) * | 2018-05-21 | 2018-11-06 | 中国人民解放军战略支援部队信息工程大学 | Non-contact fingerprint picture collector based on camera and method |
| CN109960963A (en) * | 2017-12-14 | 2019-07-02 | 红石生物特征科技有限公司 | Contactless palmmprint acquisition device and its method |
| CN113824793A (en) * | 2021-09-28 | 2021-12-21 | 深圳前海微众银行股份有限公司 | Certificate uploading identification method and device and computer readable storage medium |
| CN114783010A (en) * | 2022-06-22 | 2022-07-22 | 北京圣点云信息技术有限公司 | Extraction method of interest region of palm print image |
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| CN1971582A (en) * | 2005-11-24 | 2007-05-30 | 中国科学院自动化研究所 | Identity identification method based on palmprint image recognition |
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| CN1971582A (en) * | 2005-11-24 | 2007-05-30 | 中国科学院自动化研究所 | Identity identification method based on palmprint image recognition |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3076334A1 (en) * | 2015-03-31 | 2016-10-05 | Fujitsu Limited | Image analyzing apparatus and image analyzing method |
| CN107046561A (en) * | 2016-12-29 | 2017-08-15 | 北京奇虎科技有限公司 | A kind of method and device for business processing based on palm print data |
| CN109960963A (en) * | 2017-12-14 | 2019-07-02 | 红石生物特征科技有限公司 | Contactless palmmprint acquisition device and its method |
| CN108764093A (en) * | 2018-05-21 | 2018-11-06 | 中国人民解放军战略支援部队信息工程大学 | Non-contact fingerprint picture collector based on camera and method |
| CN113824793A (en) * | 2021-09-28 | 2021-12-21 | 深圳前海微众银行股份有限公司 | Certificate uploading identification method and device and computer readable storage medium |
| CN114783010A (en) * | 2022-06-22 | 2022-07-22 | 北京圣点云信息技术有限公司 | Extraction method of interest region of palm print image |
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