CN101627913A - Identity information identification method and identity information identification system - Google Patents
Identity information identification method and identity information identification system Download PDFInfo
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Abstract
The invention provides an identity information identification method and an identity information identification system. The method comprises the following steps: supporting the palm: placing the palm to be identified on a palm-supporting device; obtaining hand back vein information: obtaining a palm vein image of the palm to be identified on the palm-supporting device; obtaining palm print information: obtaining a palm print image of the palm to be identified on the palm-supporting device by a palm print information obtaining device aligned to the other side of the palm-supporting device; processing and identifying an identity: respectively processing and obtaining corresponding hand back vein texture information and palm print texture information; constructing an identity characteristic vector according to the hand back vein texture information and the palm print texture information; and comparing the identity characteristic vector with registered sample characteristic vectors preliminarily stored in an identity characteristic vector library to judge the identity of a user.
Description
Technical field
The present invention relates to a kind of identity information recognition methods and system thereof, relate in particular to a kind of collection live body vein and palmmprint and carry out identity information recognition methods and system thereof.
Background technology
Now, the research of human body biological characteristics recognition technology and product development have been subjected to the attention of numerous scientific research institutions and enterprise, a large amount of research concentrates on the bio-identification based on hand-characteristic, is that 200710035239.2 fingerprint recognition system, number of patent application are that 200810217350.8 the identification of finger back arthrosis stricture of vagina, number of patent application are that 200910013851.9 the identification of finger vein, number of patent application are 200710144946.4 palmmprint identification and vena metacarpea identification etc. as number of patent application.Wherein, recognition technology that is based on vein pattern and product of greatest concern.Vein pattern is compared with other biological features such as people's face, fingerprints has following several having a few: 1) vein is the live body feature, is difficult to forge; 2) vein is under the epiderm skin, and good stability is difficult for sustaining damage; 3) be not vulnerable to the influence of external environment illumination; 4) be different from people's face, vein does not have expression shape change, and feature mode is fixed; 5) to compare the imaging device volume little with recognition of face equipment.Therefore, vein identification has become identity identifying technology promising, the most of greatest concern at present.
Yet, employed feature of existing vein identification technology such as number of patent application are that 200910013851.9 finger vena and number of patent application are that 200710144946.4 vena metacarpea exists common shortcoming, be that these two kinds of veins all are in subcutaneous than the depths, and vein depth profile of living in is also inhomogeneous, the vein image contrast of utilizing existing near-infrared image forming apparatus to obtain is low, vein edge and background intersection light and shade intensity of variation are low, the venous width and the trend and unintelligible that distributes, cause the rapid increasing of vein extraction algorithm difficulty like this, finger vein and vena metacarpea that the result extracts from image are not accurate enough, smudgy, have a strong impact on the accuracy rate of identification and limited image-forming condition significantly, make the suitability of product on market significantly reduce.In addition, accidental injury and physiology pathological changes may cause the significant change of biological characteristic, and cause the single mode identity authorization system often to refuse to know legal users.
Summary of the invention
Technical problem to be solved by this invention provides a kind of simple and easy to do, and can obtain the method and system more accurately user's identity discerned.
The objective of the invention is to be achieved through the following technical solutions:
A kind of identity information recognition methods is characterized in that, comprises the steps:
Palm supports step: place and wait to distinguish the palm of identity on the palm bracing or strutting arrangement;
Hand back vein information obtaining step: aim at the hand back vein information acquisition device that a side of described palm bracing or strutting arrangement is provided with, obtain and be placed on the image of hand back vein that treating on the described palm bracing or strutting arrangement distinguished the palm of identity;
Centre of the palm palmmprint information obtaining step: aim at the centre of the palm palmmprint information acquisition device that the opposite side of described palm bracing or strutting arrangement is provided with, obtain and be placed on the image of centre of the palm palmmprint that treating on the described palm bracing or strutting arrangement distinguished the palm of identity;
Identity processing and identification step: the identity processing and identification device that is connected to described hand back vein information acquisition device and centre of the palm palmmprint information acquisition device outfan, handle and obtain the texture information of corresponding hand back vein texture information and centre of the palm palmmprint respectively, according to the texture information structure identity characteristic vector of hand back vein texture information and centre of the palm palmmprint, contrast is stored in the registration sample characteristics vector in identity characteristic vector storehouse in advance to judge user's identity again.
Find that through the research contrast same individual vein image and palmprint image have clear and definite geometrical relationship one to one, promptly each pixel on the vein image all has and only has a pixel corresponding with it on palmprint image.Adopt technique scheme, will obtain the hand back vein distribution characteristics and the palm textural characteristics of the same hand, and obtain corresponding identity, so just improved the accuracy that detects greatly according to this corresponding relation.
Preferably, described identity processing and identification step comprises the steps:
Vein texture treatment step: respectively to the image of described centre of the palm palmmprint and the interesting image regions of described hand back vein, carry out the brightness normalized, adopt the dividing method of two yardstick local thresholds again, with texture information and the hand back vein texture information that obtains corresponding centre of the palm palmmprint respectively; Then,
The thinning processing step: texture information and hand back vein texture information to described described respectively centre of the palm palmmprint carry out binary conversion treatment; Then,
Feature Fusion step: according to geometrical correspondence, the texture information of described centre of the palm palmmprint and hand back vein texture information are carried out structurized textural characteristics merge, to obtain the identity characteristic vector that intersects point set in length and breadth of double texture information that comprises described centre of the palm palmmprint and hand back vein texture information; Then,
Identification step relatively: the registration sample characteristics vector similarity in more described identity characteristic vector and the described identity characteristic vector storehouse, find registration sample characteristics vector that similarity is mated promptly to judge corresponding user's identity.
Owing to further adopted abovementioned technology, the further texture information of optimization centre of the palm palmmprint and hand back vein texture information, and can measure at specific area-of-interest, with the precision of raising detection, and the further error that may occur that reduces when discerning.
Preferably, the dividing method of described pair of yardstick local threshold comprises the steps:
The first fiducial value step: with pending pixel on the image of the image of described centre of the palm palmmprint or hand back vein is the center, obtains the first fiducial value M in neighborhood yardstick 17 * 17 pixel coverages
1(x, y),
Wherein, x, y are respectively the horizontal vertical coordinates of pending pixel, and (x y) is described pending pixel brightness value to I, degree mean
1Be the brightness average of pixel in this 17 * 17 neighborhood of pixels, σ
1Be the standard deviation of the brightness of pixel in this 17 * 17 neighborhood of pixels, k is a constant coefficient;
The second fiducial value step: with this pending pixel is the center, obtains the first fiducial value M in neighborhood yardstick 17 * 17 pixel coverages
2(x, y),
Wherein, degree mean
2Be to be the center with pending pixel, the average of pixel intensity in 33 * 33 neighborhood of pixels, σ
2Be to be the center with pending pixel, the standard deviation of the brightness of pixel in 33 * 33 neighborhood of pixels;
Compare extraction step: the texture information or the hand back vein texture information M that obtain corresponding centre of the palm palmmprint
Out(x, y),
Furthermore, in the dividing method of described pair of yardstick local threshold, the image of the corresponding described centre of the palm of difference palmmprint and the image of hand back vein, described constant coefficient k value difference.
Preferably, described Feature Fusion step comprises the steps:
The texture information of the centre of the palm palmmprint of process thinning processing step process is M
Out-palm, be M through the hand back vein texture information of thinning processing step process
Out-vein, handle and obtain described M
Out-palmAnd M
Out-veinFeature occur simultaneously and to be identity characteristic vector M
Cross(x, y),
Like this, described identity characteristic vector is a discrete intersection point set.
Preferably, described hand back vein information obtaining step comprises the steps:
The infrared light irradiating step: the infrared light supply irradiation is positioned over the hands back of the body of the palm on the described palm bracing or strutting arrangement;
Image-forming step: photoelectric converting device will by with aglow outer filter filtering the picture of this back of the hand be converted into the image of the hand back vein of corresponding electrical signal form.
The existing wavelength that studies show that is stronger to the penetration power of tissue at the near infrared spectrum of 700-900nm, and the absorbance of the hemoglobin in the blood of human body is also higher simultaneously, and like this, the image medium-sized vein part brightness of being gathered is lower.Can further improve the image quality of the image medium-sized vein texture of hand back vein, further improve the ability of whole technical proposal identification.
Furthermore, to send the light wavelength scope be 700 to 900nm to described infrared light supply; Describedly be lower than 700nm and be higher than the spectrum of 900nm with aglow outer filter filtering wavelength.
Preferably, described infrared light supply is double infrared transmitting tube array, tiltedly is provided with for the both sides of the back of the hand of the described palm of waiting to distinguish identity respectively.
Owing to further take abovementioned technology, guaranteed for uniformity, the stability of palm illumination and obtained high-quality vein image.
Alleged the back of the hand part among the present invention, for staff since four refer to roots to the wrist with the corresponding part of palm.Compare with vena metacarpea with finger vena, hand back vein is in to be close under the back of the hand epidermis, need not the distribution of promptly visible its mainline of infrared radiation, if be aided with the near-infrared light source irradiation again, just obtains vein image very clearly easily.
The present invention also provides a kind of identity information recognition system, comprising:
The palm bracing or strutting arrangement is used to place the hands palm of waiting to distinguish identity;
The hand back vein information acquisition device, a side setting of aiming at described palm bracing or strutting arrangement is used to obtain and is placed on the image of hand back vein that treating on the described palm bracing or strutting arrangement distinguished the palm of identity;
Centre of the palm palmmprint information acquisition device, the opposite side setting of aiming at described palm bracing or strutting arrangement is used to obtain and is placed on the image of centre of the palm palmmprint that treating on the described palm bracing or strutting arrangement distinguished the palm of identity;
Identity processing and identification device, it is a calculating treatmenting equipment, be connected to described hand back vein information acquisition device and centre of the palm palmmprint information acquisition device outfan, to obtain the texture information of corresponding hand back vein texture information and centre of the palm palmmprint respectively, according to the texture information structure identity characteristic vector of hand back vein texture information and centre of the palm palmmprint, contrast the identity that the user is judged in its identity characteristic vector storehouse that has again.
Preferably, described palm bracing or strutting arrangement comprises: be used to support the palm of waiting to distinguish identity, be the Zhi Qiao of a covering of the fan shape, and the covering of the fan end arc that is set in turn in described Zhi Qiao, respectively with forefinger, middle finger, the third finger and the little finger of toe of the palm of waiting to distinguish identity between be connected the corresponding position of root, first stuck point, second stuck point and the 3rd stuck point.
Owing to further adopt abovementioned technology, can determine the precision of its measurement of raising that can be more simple and easy to do to the placement location that waiting of being put into distinguished the palm of identity.
Compared with prior art the invention has the advantages that, owing to be two kinds of different biological characteristics-live body features and the non-living body feature of obtaining same physiological location simultaneously, development and utilization hand-characteristic information better, overcome traditional single finger vein, vena metacarpea image contrast low, be difficult to accurately extract the venous problem, and be fused to main thought, anti-forgery ability of raising system and level of security with the structuring of two category features.
Description of drawings
Fig. 1 is the structural representation of a kind of embodiment of identity information recognition system of the present invention;
Fig. 2 is the structural representation of the another kind of embodiment of identity information recognition system of the present invention;
Fig. 3 is the structural representation of palm bracing or strutting arrangement among the another kind of embodiment of identity information recognition system of the present invention;
Fig. 4 is the schematic flow sheet of a kind of embodiment of identity information recognition methods of the present invention.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing and preferred embodiment.
As shown in Figure 1, a kind of identity information recognition system comprises:
The palm bracing or strutting arrangement is used to place the hands palm of waiting to distinguish identity;
The hand back vein information acquisition device, a side setting of aiming at described palm bracing or strutting arrangement is used to obtain and is placed on the image of hand back vein that treating on the described palm bracing or strutting arrangement distinguished the palm of identity;
Centre of the palm palmmprint information acquisition device, the opposite side setting of aiming at described palm bracing or strutting arrangement is used to obtain and is placed on the image of centre of the palm palmmprint that treating on the described palm bracing or strutting arrangement distinguished the palm of identity;
Identity processing and identification device, be connected to described hand back vein information acquisition device and centre of the palm palmmprint information acquisition device outfan, to obtain the texture information of corresponding hand back vein texture information and centre of the palm palmmprint respectively, according to the texture information structure identity characteristic vector of hand back vein texture information and centre of the palm palmmprint, contrast the identity that the user is judged in its identity characteristic vector storehouse that has again.
The identity information recognition system more specifically an embodiment referring to shown in Figure 2,
Wherein, DV 1, DV 2, near-infrared light source 3, data communication interface 4, palm bracing or strutting arrangement 5 and computer 6, infrared filter 7, visible light source 8 and casing 9.
Identity processing and identification device is computer 6, can select to adopt ordinary PC or embedded system.
When the image acquisition of image that carries out concrete hand back vein and centre of the palm palmmprint, the palm that the user will distinguish identity stretch naturally and horizontal positioned to palm mounting table 5 as the palm bracing or strutting arrangement, the back of the hand upwards, the centre of the palm is downward.
See also accompanying drawing 3, the palm bracing or strutting arrangement comprises: be used to support the palm of waiting to distinguish identity, it is a bridge 10 of a covering of the fan shape, and the covering of the fan end arc that is set in turn in described Zhi Qiao, respectively with forefinger, middle finger, the third finger and the little finger of toe of the palm of waiting to distinguish identity between be connected the corresponding position of root, first stuck point 11, second stuck point 12 and the 3rd stuck point 13.
With the left hand is example, and the cylinder with reference to Fig. 3 should make first stuck point 11, second stuck point 12 and the 3rd stuck point 13 be respectively to be in the height at little finger and nameless root, nameless and middle finger root, middle finger and forefinger root place is used for locating finger root.
In the flow chart of identity information recognition methods as shown in Figure 4, also increased the identity characteristic vector of the identity information of gathering all registered users, promptly registered the sample characteristics vector, to obtain the registration process in identity characteristic vector storehouse, its step is as follows:
Step 2 is carried out the area-of-interest extraction to the image of hand back vein and the image of centre of the palm palmmprint respectively.Owing to have the fixedly localized stuck point of palm on the palm bracing or strutting arrangement, simultaneously, stuck point has specific image information again, like this according to the position of stuck point in image as according to extracting the region of interest area image of regular length and width respectively, as the 50th pixel begins, begins to get the image of 256 * 256 pixels as area-of-interest from the 20th pixel of stuck point 1 left from stuck point 1 below.
The flow process of identity information recognition methods comprises the steps:
Step 2 is carried out the area-of-interest extraction to the image of hand back vein and the image of centre of the palm palmmprint respectively.Owing to have the fixedly localized stuck point of palm on the palm bracing or strutting arrangement, simultaneously, stuck point has specific image information again, like this according to the position of stuck point in image as according to extracting the region of interest area image of regular length and width respectively, as the 50th pixel begins, begins to get the image of 256 * 256 pixels as area-of-interest from the 20th pixel of stuck point 1 left from stuck point 1 below.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1, a kind of identity information recognition methods is characterized in that, comprises the steps:
Palm supports step: place and wait to distinguish the palm of identity on the palm bracing or strutting arrangement;
Hand back vein information obtaining step: aim at the hand back vein information acquisition device that a side of described palm bracing or strutting arrangement is provided with, obtain and be placed on the image of hand back vein that treating on the described palm bracing or strutting arrangement distinguished the palm of identity;
Centre of the palm palmmprint information obtaining step: aim at the centre of the palm palmmprint information acquisition device that the opposite side of described palm bracing or strutting arrangement is provided with, obtain and be placed on the image of centre of the palm palmmprint that treating on the described palm bracing or strutting arrangement distinguished the palm of identity;
Identity processing and identification step: identity processing and identification device is handled the image of described hand back vein and the image of centre of the palm palmmprint respectively, to obtain the texture information of corresponding hand back vein texture information and centre of the palm palmmprint, according to the texture information structure identity characteristic vector of hand back vein texture information and centre of the palm palmmprint, contrast is stored in the registration sample characteristics vector in identity characteristic vector storehouse in advance to judge user's identity again.
2, identity information recognition methods as claimed in claim 1 is characterized in that, described identity processing and identification step comprises the steps:
Vein texture treatment step: respectively to area-of-interest in the image of the image of described centre of the palm palmmprint and described hand back vein, carry out the brightness normalized, adopt the dividing method of two yardstick local thresholds again, with texture information and the hand back vein texture information that obtains corresponding centre of the palm palmmprint respectively; Then,
The thinning processing step: texture information and hand back vein texture information to described described respectively centre of the palm palmmprint carry out binary conversion treatment; Then,
Feature Fusion step: according to geometrical correspondence, the texture information of described centre of the palm palmmprint and hand back vein texture information are carried out structurized textural characteristics merge, to obtain the identity characteristic vector that intersects point set in length and breadth of double texture information that comprises described centre of the palm palmmprint and hand back vein texture information; Then,
Identification step relatively: the registration sample characteristics vector similarity in more described identity characteristic vector and the described identity characteristic vector storehouse, find registration sample characteristics vector that similarity is mated promptly to judge corresponding user's identity.
3, identity information recognition methods as claimed in claim 2 is characterized in that, the dividing method of described pair of yardstick local threshold comprises the steps:
The first fiducial value step: with pending pixel on the image of the image of described centre of the palm palmmprint or hand back vein is the center, obtains the first fiducial value M in neighborhood yardstick P * P pixel coverage
1(x, y), wherein, the P natural number;
Wherein, x, y are respectively the horizontal vertical coordinates of pending pixel, and (x y) is described pending pixel brightness value to I, degree mean
1Be the brightness average of pixel in this P * P neighborhood of pixels, σ
1Be the standard deviation of the brightness of pixel in this P * P neighborhood of pixels, k is a constant coefficient;
The second fiducial value step: with this pending pixel is the center, obtains the first fiducial value M in neighborhood yardstick P * P pixel coverage
2(x, y),
Wherein, degree mean
2Be to be the center with pending pixel, the average of pixel intensity in Q * Q neighborhood of pixels, σ
2Be to be the center with pending pixel, the standard deviation of the brightness of pixel in Q * Q neighborhood of pixels, wherein, Q is the natural number greater than P;
Compare extraction step: the texture information or the hand back vein texture information M that obtain corresponding centre of the palm palmmprint
Out(x, y),
4, identity information recognition methods as claimed in claim 3 is characterized in that, in the dividing method of described pair of yardstick local threshold, and the image of the corresponding described centre of the palm of difference palmmprint and the image of hand back vein, described constant coefficient k value difference.
5, as claim 3 or 4 described identity information recognition methodss, it is characterized in that described Feature Fusion step comprises the steps:
The texture information of the centre of the palm palmmprint of process thinning processing step process is M
Out-palm, be M through the hand back vein texture information of thinning processing step process
Out-vein, handle and obtain described M
Out-palmAnd M
Out-veinFeature occur simultaneously and to be identity characteristic vector M
Cross(x, y),
6, identity information recognition methods as claimed in claim 1 is characterized in that, described hand back vein information obtaining step comprises the steps:
The infrared light irradiating step: the infrared light supply irradiation is positioned over the hands back of the body of the palm on the described palm bracing or strutting arrangement;
Image-forming step: photoelectric converting device will by with aglow outer filter filtering the picture of this back of the hand be converted into the image of the hand back vein of corresponding electrical signal form.
7, identity information recognition methods as claimed in claim 6 is characterized in that, it is 700 to 900nm that described infrared light supply sends the light wavelength scope; Describedly be lower than 700nm and be higher than the spectrum of 900nm with aglow outer filter filtering wavelength.
As claim 6 or 7 described identity information recognition methodss, it is characterized in that 8, described infrared light supply is double infrared transmitting tube array, tiltedly be provided with respectively for the both sides of the back of the hand of the described palm of waiting to distinguish identity.
9, a kind of identity information recognition system is characterized in that, comprising:
The palm bracing or strutting arrangement is used to place the hands palm of waiting to distinguish identity;
The hand back vein information acquisition device, a side setting of aiming at described palm bracing or strutting arrangement is used to obtain and is placed on the image of hand back vein that treating on the described palm bracing or strutting arrangement distinguished the palm of identity;
Centre of the palm palmmprint information acquisition device, the opposite side setting of aiming at described palm bracing or strutting arrangement is used to obtain and is placed on the image of centre of the palm palmmprint that treating on the described palm bracing or strutting arrangement distinguished the palm of identity;
Identity processing and identification device, be connected to described hand back vein information acquisition device and centre of the palm palmmprint information acquisition device outfan, to obtain the texture information of corresponding hand back vein texture information and centre of the palm palmmprint respectively, according to the texture information structure identity characteristic vector of hand back vein texture information and centre of the palm palmmprint, contrast the identity that the user is judged in its identity characteristic vector storehouse that has again.
10, identity information recognition system as claimed in claim 9, it is characterized in that, described palm bracing or strutting arrangement comprises: be used to support the palm of waiting to distinguish identity, be the Zhi Qiao of a covering of the fan shape, and the covering of the fan end arc that is set in turn in described Zhi Qiao, respectively with forefinger, middle finger, the third finger and the little finger of toe of the palm of waiting to distinguish identity between be connected the corresponding position of root, first stuck point, second stuck point and the 3rd stuck point.
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| CN102129552A (en) * | 2011-03-03 | 2011-07-20 | 哈尔滨工业大学 | Integrated noncontact-type hand characteristic image acquisition system |
| CN102254165A (en) * | 2011-08-12 | 2011-11-23 | 北方工业大学 | Hand back vein identification method based on fusion of structural coding features and texture coding features |
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| CN105678876A (en) * | 2016-01-07 | 2016-06-15 | 天津理工大学 | Intelligent access control system based on hand back superficial vein recognition |
| CN106203322A (en) * | 2016-07-05 | 2016-12-07 | 西安交通大学 | A kind of identity authorization system based on hand back vein and palmmprint fusion image and method |
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| CN107256395A (en) * | 2017-06-12 | 2017-10-17 | 成都芯软科技股份公司 | Vena metacarpea extracting method and device |
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