CN109247911A - A kind of multi-modal characteristic synchronization acquisition system of finger - Google Patents
A kind of multi-modal characteristic synchronization acquisition system of finger Download PDFInfo
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- CN109247911A CN109247911A CN201810824891.0A CN201810824891A CN109247911A CN 109247911 A CN109247911 A CN 109247911A CN 201810824891 A CN201810824891 A CN 201810824891A CN 109247911 A CN109247911 A CN 109247911A
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- 238000012545 processing Methods 0.000 claims abstract description 42
- 210000002615 epidermis Anatomy 0.000 claims abstract description 26
- 210000003491 skin Anatomy 0.000 claims abstract description 13
- 210000000106 sweat gland Anatomy 0.000 claims abstract description 11
- 238000007920 subcutaneous administration Methods 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- 238000001228 spectrum Methods 0.000 claims description 33
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- 238000003384 imaging method Methods 0.000 claims description 4
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- 230000000996 additive effect Effects 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000003491 array Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- 238000010330 laser marking Methods 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 3
- 239000013307 optical fiber Substances 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims 1
- 239000008280 blood Substances 0.000 claims 1
- 210000004369 blood Anatomy 0.000 claims 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
- 230000017531 blood circulation Effects 0.000 abstract description 7
- 238000012014 optical coherence tomography Methods 0.000 description 21
- 238000005516 engineering process Methods 0.000 description 12
- 238000013461 design Methods 0.000 description 5
- 230000001360 synchronised effect Effects 0.000 description 4
- 210000004204 blood vessel Anatomy 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
- A61B5/0062—Arrangements for scanning
- A61B5/0066—Optical coherence imaging
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
- A61B5/0073—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence by tomography, i.e. reconstruction of 3D images from 2D projections
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/026—Measuring blood flow
- A61B5/0261—Measuring blood flow using optical means, e.g. infrared light
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/117—Identification of persons
- A61B5/1171—Identification of persons based on the shapes or appearances of their bodies or parts thereof
- A61B5/1172—Identification of persons based on the shapes or appearances of their bodies or parts thereof using fingerprinting
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/42—Detecting, measuring or recording for evaluating the gastrointestinal, the endocrine or the exocrine systems
- A61B5/4222—Evaluating particular parts, e.g. particular organs
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Abstract
A kind of multi-modal characteristic synchronization acquisition system of finger, including finger epidermis finger print acquisition module (1000), finger OCT information acquisition module (1100), support module (1200), finger OAG message processing module (1300) and computer (1400)；Support module (1200) is expanded for realizing data-interface so as to the transmission of the data of computer and modules and power supply output；Finger epidermis finger print acquisition module (1000) for realizing finger epidermis finger print information acquisition；Finger OCT information acquisition module (1100) is used to be responsible for the acquisition of finger OCT information；Finger OAG message processing module (1300) is converted into OAG information for realizing by OCT information；Computer (1400) is further processed for realizing to collected information.The present invention can obtain finger Epidermal Fingerprint, finger skin corium fingerprint and sweat glands, finger subcutaneous blood flow rate information.
Description
Technical field
The invention belongs to biometrics identification technology field, especially a kind of synchronous acquisition finger Epidermal Fingerprint, finger are true
The system of cortex fingerprint and sweat gland, finger subcutaneous blood flow rate information.
Background technique
The fast development of information technology, so that entire society becomes the combination of information and network.And social informatization with
Safety when network just becomes an important topic.Traditional identity identifying method is easy to be forged or pretend to be, and gives birth to
Object identification technology is to carry out certification identification to itself personal exclusive feature, and safety greatly reinforces.But due to single mode
Finger biometric feature will receive the limitations of problems in practical applications, such as vulnerable to the influence of data noise, and with
Biological characteristic forges the progress of technology, and antifalsification is also easier to be challenged.
Therefore, multiple modalities biological characteristic is subjected to information fusion to complete authentication as a kind of feasible solution party
Case.Compared to single finger biometric feature verification technology, multiple modalities biological characteristic is merged to complete authentication,
Multiple modalities biological characteristic, which is formed, to have complementary advantages, and possesses the features such as distinction is high, antifalsification is high.
Optical Coherence Tomography Imaging Technology (Optical Coherence Tomography, OCT) is a kind of non-intruding, non-
Contact and undamaged optical image technology, low coherence interferometer and confocal scanning microscopy are combined together by it, utilize height
The heterodyne detection technology of sensitivity can carry out the microstructure inside biological tissue or other scattering mediums high-resolution
Cross section tomography.OCT technology is built upon on the basis of optics Low coherence reflectometer, and this optical testing technology is initially led
Detection light sum aggregate is used into waveguide device, be used to detect biological tissue later, for example, for measure corneal thickness and
Axiallength.
And optics microangiography OAG (Optical Angiography, OAG) is based on the basis of traditional frequency domain OCT,
Plural analytic signal is constructed using the Hilbert transform of real number interference signal, then the knot of sample is obtained by Fourier transformation
Structure and flow rate information.Can be used to detect microflow rate, show good application and seen prospect, such as detection human skin with
Human eye retina's microcirculation situation.
In the multi-modal feature of finger, finger epidermis finger print information is as biometric feature most mature at present, tool
There are discrimination height, easily acquisition, easily received feature；And in the OCT information of finger include the letter such as skin corium fingerprint and sweat gland
Breath can resist the attack for forging sample；Include finger microvascular blood flow information in OAG information, can be used for active false proof
On.In the present invention, we devise it is a kind of can be with the system of these three characteristic modes information of synchronous acquisition.
Summary of the invention
In order to solve the problems, such as the multi-modal collection apparatus of finger, the present invention provides one kind can be with synchronous acquisition finger epidermis
Fingerprint, finger skin corium fingerprint, finger sweat gland, finger subcutaneous blood flow rate information system, in order to realize the same of multiple mode
Step acquisition, using the design of Dove prism, so that the work that two kinds of light sources in whole device are independent of each other.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of multi-modal characteristic synchronization acquisition system of finger, including finger epidermis finger print acquisition module (1000), finger OCT
Information acquisition module (1100), support module (1200), finger OAG message processing module (1300) and computer (1400)；Institute
Support module (1200) is stated to expand for realizing data-interface so as to the transmission of the data of computer (1400) and modules and electricity
Source output；The finger epidermis finger print acquisition module (1000) for realizing finger epidermis finger print information acquisition；Finger OCT letter
Breath acquisition module (1100) is used to be responsible for the acquisition of finger OCT information；Finger OAG message processing module (1300) is for realizing general
Original interference spectral signal is converted into OAG information；Computer (1400) is further processed for realizing to collected information, obtains
To the final required multi-modal characteristic information of finger.
Further, the finger epidermis finger print acquisition module (1000) is by industrial camera (1001), achromatism twisted pair
Lens (1002), monochromatic collimated beam light source (1003) composition, the light beam issued by monochromatic collimated beam light source (1003) is via trapezoidal
Directive achromatism twisted pair lens (1002) after prism, final light beam is to industrial camera (1001), by industrial camera (1001)
Collect relevant information.
The industrial camera (1001) is used to be responsible for the acquisition of finger epidermis finger print information, which passes through network interface
(1202) it is connected with computer (1400), obtained data information is uploaded, which uses BASLER black and white industry phase
Machine, uses Sony ICX285 sensitive chip, and maximum can acquire the picture number that 30 frames are per second under 1392*1040 resolution ratio
According to.
The monochromatic collimated beam light source (1003) provides light to finger epidermis finger print acquisition module (1000) for being responsible for
Source.The light source is by a red LED, object lens, focus lamp and filter set at object lens and focus lamp ensure that final light beam
It is directional light, and adds optical filter and ensure that final light beam is monochromatic light.
The finger OCT information acquisition module (1100) is by reference arm (1101), sample arm (1102), spectrometer
(1103), galvanometer (1104), 2*2 fiber coupler (1105) and 1310nm wideband light source (1106) composition, in acquisition, by
For the light beam that 1310nm wideband light source (1106) issues by being divided into two-way after 2*2 fiber coupler (1105), an optical path is straight
It connects directive reference arm (1101), another optical path is emitted directly toward sample by sample arm (1102), and reference arm (1101) includes one
A reflecting mirror, sample arm (1102) include a collimator, the object lens of a pair of of galvanometer (1104) and a 50mm focal length；Then,
The light beam reflected from reference arm (1101) and sample arm (1102) is coupled together, and is transferred to inspection in high speed spectrometer (1103)
Survey spectrum interference signal；Interference signal uploads on capture card by CameraLink (1201) interface and then passes through PCIe interface
(1203) it finally uploads in computer (1400).
The reference arm (1101) is made of reflecting mirror and condenser lens, the parameter of condenser lens are as follows: D=6mm, f=
10mm。
The sample arm (1102) is made of fiber optic collimator mirror, galvanometer (1104), condenser lens, from 2*2 fiber coupling
The light beam that device (1105) comes out passed through collimating mirror before this and then impinged upon on galvanometer, after the reflection of galvanometer most by condenser lens
It is penetrated on finger sample eventually, optical fiber collimator F260APC-C, NA=0.16, f=15.52, the light beam 1/e of output2Diameter is
2.74mm；Condenser lens D=30mm, f=50mm.
The spectrometer (1103) is used to detect the interference signal of spectrum, the collimating mirror D=30mm, f=90mm of spectrometer；
Spectrometer focusing mirror D=50.8mm, f=75mm；Projection grating manufacturer be Wasatch Photonics, dimension D=
50.8mm, with a thickness of 6mm, central wavelength 1310nm, incisure density is 1145 lines/mm, and the line array CCD applied uses
SENSORS company GL2048R line array CCD, pixel number are 2048, and single Pixel size is 10um*210um, maximum sampling
Frequency is up to 147kHz.
The galvanometer (1104) is a pair of of X galvanometer and Y galvanometer, changes the side of light beam by the control to galvanometer (1104)
To the finger sample of certain area, the galvanometer can be collected so that the position for being radiated at finger sample beam changes
It (1104) is big nation's motor medical treatment galvanometer, mating easily to pacify sharp MC800 laser marking control card, X galvanometer eyeglass and Y galvanometer eyeglass are equal
Golden reflecting mirror is protected for Edmund, having a size of 12.5mm*12.5mm and 12.5mm*17.5mm.
For the 2*2 fiber coupler (1105) for realizing the branch of optical signal, splitting ratio 50:50 is equipped with four
FC/APC connector.The end face of FC/APC connector be it is inclined, can effectively inhibit end face reflection bring noise.
The 1310nm wideband light source (1106) provides light source to finger OCT information acquisition module (1100) for being responsible for.
Using IPSDS1307C wideband light source, which is 1310nm, three dB bandwidth 75nm, output power 15mW.
In the support module (1200), CameraLink (1201) interface passes through two CameraLink lines for linear array
CCD is connected with capture card；Network interface (1202) realizes the connection of industrial camera (1001) and (1400) that calculate；PCIe interface
(1203) capture card is connect with computer (1400)；USB3.0 interface (1204) is by computer (1400) and galvanometer control card phase
Connection, transmits control signals to galvanometer (1104), makes galvanometer (1104) according to control signal movement；The power supply branch of whole system
Hold the 2.5V including monochromatic collimated beam light source (1003), the 5V of 1310nm wideband light source (1106), industrial camera (1001), spectrum
220V alternating current required for instrument (1103), the 12V of galvanometer (1104) and computer (1400).
The finger OAG message processing module (1300) is used to obtain interference spectrum information before to handle, and obtains
Required OAG information；The interference spectrum information obtained before is first done into a Hilbert transform in scanning direction, is then existed
Other direction does finger OAG information required for Fourier transformation obtains.
The computer (1400) includes that original data processing unit (1401), image processing unit (1402) and result are aobvious
Show unit (1403), original data processing unit (1401) handles obtained interference spectrum；Image processing unit
(1402) obtained finger Epidermal Fingerprint, skin corium fingerprint, sweat gland, blood-stream image are handled；Unit as the result is shown
(1403) obtained final result is shown, is compared convenient for analysis.
In the original data processing unit (1401), obtains OCT signal and be divided into following seven steps, the first step is to light
Spectrum is intercepted；Second step is interpolation, using interpolation coefficient by light intensity with the function of CCD pixel even variation be converted to light intensity with
The function of wave number k uniform transition；Third step is to subtract direct current, subtracts the DC quantity in interference spectrum to reduce making an uproar near zero light path
Sound；4th step is dispersion compensation, subtracts dispersion additive phase in the phase term of spectrum after subtracting direct current；5th step carries out FFT step
Suddenly, using auto-power spectrum, modulus is increased on the basis of completing FFT, scales, take unilateral operation；6th step is in order to enhance
Contrast takes logarithm to be obtained with intensity map the relationship of acquisition；7th step defines intensity pass corresponding with rgb value
System, intensity meaning, which is carried out conversion, can be obtained by OCT two dimension pcolor；
It obtains OAG information and is divided into following seven steps, the first step locates the original interference spectral signal of acquisition in advance
Reason, including execute interception, interpolation, subtract direct current, dispersion compensation processing；Second step is the every of two-dimensional array after independent processing pre-processes
A line carries out Hilbert transform to each row；Third step is each column for individually handling new two-dimensional array, to it is each arrange into
Row FFT；4th step is interception, because imaging depth is limited in order to which the convenience of subsequent processing only needs suitably to intercept with penetration capacity
Partial data；5th step is modulus and logarithm, the logarithm of the interior point in access group, to increase intensity map comparison
Intensity value and color value one-to-one correspondence can be obtained pseudocolour picture by degree；6th step laterally cuts obtained two-dimensional array,
It is divided into two two-dimensional arrays, the two-dimensional array of top is the negative frequency component that FFT is obtained, and the two-dimensional array of lower section obtains for FFT
Positive frequency component, respectively correspond flow velocity planar strength figure and Static planar intensity map；7th step is to subtract each other to take to make an uproar, and utilizes static state
Flat image, which does flow velocity flat image, subtracts each other processing, obtains new flow velocity flat image.It is subcutaneously micro- finger has thus been obtained
The part of blood vessel.
The extraction of obtained finger OCT two dimension pcolor is spliced into complete finger by described image processing unit (1402)
Skin corium and sweat gland image.Obtained finger OAG two dimension pcolor is spliced into the subcutaneous capilary image of complete finger.
The multi-modal characteristic synchronization acquisition system of the finger further includes the finger placement platform for placing Dove prism,
It is made using the stainless steel of black, there is the hole for just putting down Dove prism in centre, and palm is put on the platform, and finger is placed exactly in
The placement location of Dove prism, convenient for the acquisition of data.
The multi-modal characteristic synchronization acquisition system of the finger that the present invention designs, is completed using multiple technologies for finger epidermis
Fingerprint, finger skin corium fingerprint, finger subcutaneous blood flow rate information synchronous acquisition.The excellent of each mode can be made full use of
Point makes up the deficiency of single mode feature.And the ingehious design of Dove prism makes used two different in the device
Light source can be used effectively simultaneously, do not interfere with each other, the acquisition of each modal information is allowed to synchronize progress.
Beneficial effects of the present invention are mainly cashed: highly-safe, discrimination is high.
Detailed description of the invention
Fig. 1 is the multi-modal characteristic synchronization acquisition system structural schematic block diagram of finger.
Fig. 2 is the multi-modal characteristic synchronization acquisition system flow chart of finger.
Specific embodiment
It is further described in detail with reference to the accompanying drawing:
Referring to Figures 1 and 2, the multi-modal characteristic synchronization acquisition system of a kind of finger, including finger epidermis finger print acquisition module
(1000), finger OCT information acquisition module (1100), support module (1200), finger OAG message processing module (1300) and meter
Calculation machine (1400)；The support module (1200) is expanded for realizing data-interface so as to computer (1400) and modules
Data transmission and power supply output；Finger epidermis finger print acquisition module (1000) the adopting for realizing finger epidermis finger print information
Collection；Finger OCT information acquisition module (1100) is used to be responsible for the acquisition of finger OCT information；Finger OAG message processing module
(1300) OAG information is converted into for realizing by original interference spectral signal；Computer (1400) is for realizing to collected
Information is further processed, and obtains the final required multi-modal characteristic information of finger.
Further, the finger epidermis finger print acquisition module (1000) is by industrial camera (1001), achromatism twisted pair
Lens (1002), monochromatic collimated beam light source (1003) composition, the light beam issued by monochromatic collimated beam light source (1003) is via trapezoidal
Directive achromatism twisted pair lens (1002) after prism, final light beam is to industrial camera (1001), by industrial camera (1001)
Collect relevant information.
The industrial camera (1001) is used to be responsible for the acquisition of finger epidermis finger print information, which passes through network interface
(1202) it is connected with computer (1400), obtained data information is uploaded, which uses BASLER black and white industry phase
Machine, uses Sony ICX285 sensitive chip, and maximum can acquire the picture number that 30 frames are per second under 1392*1040 resolution ratio
According to.
The monochromatic collimated beam light source (1003) provides light to finger epidermis finger print acquisition module (1000) for being responsible for
Source.The light source is by a red LED, object lens, focus lamp and filter set at object lens and focus lamp ensure that final light beam
It is directional light, and adds optical filter and ensure that final light beam is monochromatic light.
The finger OCT information acquisition module (1100) is by reference arm (1101), sample arm (1102), spectrometer
(1103), galvanometer (1104), 2*2 fiber coupler (1105) and 1310nm wideband light source (1106) composition, in acquisition, by
For the light beam that 1310nm wideband light source (1106) issues by being divided into two-way after 2*2 fiber coupler (1105), an optical path is straight
It connects directive reference arm (1101), another optical path is emitted directly toward sample by sample arm (1102), and reference arm (1101) includes one
A reflecting mirror, sample arm (1102) include a collimator, the object lens of a pair of of galvanometer (1104) and a 50mm focal length；Then,
The light beam reflected from reference arm (1101) and sample arm (1102) is coupled together, and is transferred to inspection in high speed spectrometer (1103)
Survey spectrum interference signal；Interference signal uploads on capture card by CameraLink (1201) interface and then passes through PCIe interface
(1203) it finally uploads in computer (1400).
The reference arm (1101) is made of reflecting mirror and condenser lens, the parameter of condenser lens are as follows: D=6mm, f=
10mm。
The sample arm (1102) is made of fiber optic collimator mirror, galvanometer (1104), condenser lens, from 2*2 fiber coupling
The light beam that device (1105) comes out passed through collimating mirror before this and then impinged upon on galvanometer, after the reflection of galvanometer most by condenser lens
It is penetrated on finger sample eventually, optical fiber collimator F260APC-C, NA=0.16, f=15.52, the light beam 1/e of output2Diameter is
2.74mm；Condenser lens D=30mm, f=50mm.
The spectrometer (1103) is used to detect the interference signal of spectrum, the collimating mirror D=30mm, f=90mm of spectrometer；
Spectrometer focusing mirror D=50.8mm, f=75mm；Projection grating manufacturer be Wasatch Photonics, dimension D=
50.8mm, with a thickness of 6mm, central wavelength 1310nm, incisure density is 1145 lines/mm, and the line array CCD applied uses
SENSORS company GL2048R line array CCD, pixel number are 2048, and single Pixel size is 10um*210um, maximum sampling
Frequency is up to 147kHz.
The galvanometer (1104) is a pair of of X galvanometer and Y galvanometer, changes the side of light beam by the control to galvanometer (1104)
To the finger sample of certain area, the galvanometer can be collected so that the position for being radiated at finger sample beam changes
It (1104) is big nation's motor medical treatment galvanometer, mating easily to pacify sharp MC800 laser marking control card, X galvanometer eyeglass and Y galvanometer eyeglass are equal
Golden reflecting mirror is protected for Edmund, having a size of 12.5mm*12.5mm and 12.5mm*17.5mm.
For the 2*2 fiber coupler (1105) for realizing the branch of optical signal, splitting ratio 50:50 is equipped with four
FC/APC connector.The end face of FC/APC connector be it is inclined, can effectively inhibit end face reflection bring noise.
The 1310nm wideband light source (1106) provides light source to finger OCT information acquisition module (1100) for being responsible for.
Using IPSDS1307C wideband light source, which is 1310nm, three dB bandwidth 75nm, output power 15mW.
In the support module (1200), CameraLink (1201) interface passes through two CameraLink lines for linear array
CCD is connected with capture card；Network interface (1202) realizes the connection of industrial camera (1001) and (1400) that calculate；PCIe interface
(1203) capture card is connect with computer (1400)；USB3.0 interface (1204) is by computer (1400) and galvanometer control card phase
Connection, transmits control signals to galvanometer (1104), makes galvanometer (1104) according to control signal movement；The power supply branch of whole system
Hold the 2.5V including monochromatic collimated beam light source (1003), the 5V of 1310nm wideband light source (1106), industrial camera (1001), spectrum
220V alternating current required for instrument (1103), the 12V of galvanometer (1104) and computer (1400).
The finger OAG message processing module (1300) is used to obtain interference spectrum information before to handle, and obtains
Required OAG information；The interference spectrum information obtained before is first done into a Hilbert transform in scanning direction, is then existed
Other direction does finger OAG information required for Fourier transformation obtains.
The computer (1400) includes that original data processing unit (1401), image processing unit (1402) and result are aobvious
Show unit (1403), original data processing unit (1401) handles obtained interference spectrum；Image processing unit
(1402) obtained finger Epidermal Fingerprint, skin corium fingerprint, sweat gland, blood-stream image are handled；Unit as the result is shown
(1403) obtained final result is shown, is compared convenient for analysis.
In the original data processing unit (1401), obtains OCT signal and be divided into following seven steps, the first step is to light
Spectrum is intercepted；Second step is interpolation, using interpolation coefficient by light intensity with the function of CCD pixel even variation be converted to light intensity with
The function of wave number k uniform transition；Third step is to subtract direct current, subtracts the DC quantity in interference spectrum to reduce making an uproar near zero light path
Sound；4th step is dispersion compensation, subtracts dispersion additive phase in the phase term of spectrum after subtracting direct current；5th step carries out FFT step
Suddenly, using auto-power spectrum, modulus is increased on the basis of completing FFT, scales, take unilateral operation；6th step is in order to enhance
Contrast takes logarithm to be obtained with intensity map the relationship of acquisition；7th step defines intensity pass corresponding with rgb value
System, intensity meaning, which is carried out conversion, can be obtained by OCT two dimension pcolor；
It obtains OAG information and is divided into following seven steps, the first step locates the original interference spectral signal of acquisition in advance
Reason, including execute interception, interpolation, subtract direct current, dispersion compensation processing；Second step is the every of two-dimensional array after independent processing pre-processes
A line carries out Hilbert transform to each row；Third step is each column for individually handling new two-dimensional array, to it is each arrange into
Row FFT；4th step is interception, because imaging depth is limited in order to which the convenience of subsequent processing only needs suitably to intercept with penetration capacity
Partial data；5th step is modulus and logarithm, the logarithm of the interior point in access group, to increase intensity map comparison
Intensity value and color value one-to-one correspondence can be obtained pseudocolour picture by degree；6th step laterally cuts obtained two-dimensional array,
It is divided into two two-dimensional arrays, the two-dimensional array of top is the negative frequency component that FFT is obtained, and the two-dimensional array of lower section obtains for FFT
Positive frequency component, respectively correspond flow velocity planar strength figure and Static planar intensity map；7th step is to subtract each other to take to make an uproar, and utilizes static state
Flat image, which does flow velocity flat image, subtracts each other processing, obtains new flow velocity flat image.It is subcutaneously micro- finger has thus been obtained
The part of blood vessel.
The extraction of obtained finger OCT two dimension pcolor is spliced into complete finger by described image processing unit (1402)
Skin corium and sweat gland image.Obtained finger OAG two dimension pcolor is spliced into the subcutaneous capilary image of complete finger.
The multi-modal characteristic synchronization acquisition system of the finger further includes the finger placement platform for placing Dove prism,
It is made using the stainless steel of black, there is the hole for just putting down Dove prism in centre, and palm is put on the platform, and finger is placed exactly in
The placement location of Dove prism, convenient for the acquisition of data.
The multi-modal characteristic synchronization acquisition system of the finger that the present invention designs, is completed using multiple technologies for finger epidermis
The acquisition of fingerprint, finger skin corium fingerprint, finger subcutaneous blood flow rate information.The advantages of each mode can be made full use of, more
Mend the deficiency of single mode feature.And the ingehious design of Dove prism makes used two different light sources can in the device
Effectively to use simultaneously, it does not interfere with each other, the acquisition of each modal information is allowed to synchronize progress.
As shown in Fig. 2, the process of the multi-modal characteristic synchronization acquisition system of finger is,
(1) all power supplys of system are opened by support module (1200), system starts:
(2) monochromatic collimated beam light source (1003) and 1310nm wideband light source (1106) are started to work.
(3) monochromatic collimated beam enters finger epidermis finger print acquisition module (1000), and light beam leads to after finger watch cutaneous reflex
Achromatism twisted pair lens (1002) are crossed to be received by industrial camera (1001).Spectral signal containing finger epidermis finger print information is logical
It crosses network interface (1202) to be received by computer (1400), and shows result (1403) on a display screen.
(4) 1310nm broadband light is divided into two-way, an optical path directive reference arm via 2 × 2 fiber couplers (1105)
(1101) reflecting mirror, another light beam pass through our finger of sample arm (1102) directive.There is one in reference arm (1101)
Dispersion compensation glass.Then, it is coupled in detection arm from the light beam that reference arm (1101) and sample arm (1102) reflect, transmission
To detection spectrum interference signal in high speed spectrometer (1103).Pass through CameraLink interface (1201) and PCIe interface (1203)
Obtained interference spectrum is uploaded in computer (1400).
(5) original data processing (1401) and image procossing (1402) are carried out in computer (1400), it is dry to what is obtained
Intensity map can be converted for spectrogram by relating to Fourier transformation of spectrum progress.Obtained two-dimentional OCT image is extracted and is spliced
After can obtain required for finger skin corium fingerprint and sweat gland picture.
(6) obtained interference spectrum is handled in computer (1400), first does a Hilbert along scanning direction
It converts, then do Fourier transformation in another direction can to get well required finger subcutaneous blood flow rate information.And aobvious
Show screen display result (1403).
Above embodiment is the preferable embodiment of the present invention, but embodiments of the present invention are not by the embodiment
Limitation, it is other it is any without departing from the spirit and principles of the present invention made by modification, substitution, combination, cut, should all
For equivalent substitute mode, it is included within the scope of the present invention.
Claims (10)
1. a kind of multi-modal characteristic synchronization acquisition system of finger, it is characterised in that: the system comprises finger epidermis fingerprint collectings
Module (1000), finger OCT information acquisition module (1100), support module (1200), finger OAG message processing module (1300)
With computer (1400)；The support module (1200) is expanded for realizing data-interface so as to computer (1400) and each mould
The data transmission and power supply output of block；The finger epidermis finger print acquisition module (1000) is for realizing finger epidermis finger print information
Acquisition；Finger OCT information acquisition module (1100) is used to be responsible for the acquisition of finger OCT information；Finger OAG message processing module
(1300) OAG information is converted into for realizing by original interference spectral signal；Computer (1400) is for realizing to collected
Information is further processed, and obtains the final required multi-modal characteristic information of finger.
2. a kind of multi-modal characteristic synchronization acquisition system of finger as described in claim 1, it is characterised in that: the finger watch
Skin finger print acquisition module (1000) is by industrial camera (1001), achromatism twisted pair lens (1002), monochromatic collimated beam light source
(1003) it forms, the light beam issued by monochromatic collimated beam light source (1003) is via directive achromatism twisted pair lens after Dove prism
(1002), final light beam collects relevant information by industrial camera (1001) to industrial camera (1001).
3. a kind of multi-modal characteristic synchronization acquisition system of finger as claimed in claim 2, it is characterised in that: the industrial phase
Machine (1001) is used to be responsible for the acquisition of finger epidermis finger print information, which passes through network interface (1202) and computer (1400) phase
Even, obtained data information is uploaded, which uses BASLER black and white industrial camera, use Sony ICX285
Sensitive chip, maximum can acquire the image data that 30 frames are per second under 1392*1040 resolution ratio；
The monochromatic collimated beam light source (1003) provides light source to finger epidermis finger print acquisition module (1000) for being responsible for, should
Light source is by a red LED, object lens, focus lamp and filter set at object lens ensure that final light beam is flat with focus lamp
Row light, and add optical filter and ensure that final light beam is monochromatic light.
4. the multi-modal characteristic synchronization acquisition system of a kind of finger as described in one of claims 1 to 3, it is characterised in that: described
Finger OCT information acquisition module (1100) by reference arm (1101), sample arm (1102), spectrometer (1103), galvanometer
(1104), 2*2 fiber coupler (1105) and 1310nm wideband light source (1106) composition, in acquisition, by 1310nm broadband light
For the light beam that source (1106) issues by being divided into two-way after 2*2 fiber coupler (1105), an optical path is emitted directly toward reference arm
(1101), another optical path is emitted directly toward sample by sample arm (1102), and reference arm (1101) includes a reflecting mirror, sample
Arm (1102) includes a collimator, the object lens of a pair of of galvanometer (1104) and a 50mm focal length；Then, from reference arm (1101)
It is coupled together with the light beam of sample arm (1102) reflection, is transferred to detection spectral interference letter in high speed spectrometer (1103)
Number；Interference signal by CameraLink (1201) interface upload on capture card then by PCIe interface (1203) it is final on
It passes in computer (1400).
5. a kind of multi-modal characteristic synchronization acquisition system of finger as claimed in claim 4, it is characterised in that: the reference arm
(1101) it is made of reflecting mirror and condenser lens, the parameter of condenser lens are as follows: D=6mm, f=10mm；
The sample arm (1102) is made of fiber optic collimator mirror, galvanometer (1104), condenser lens, from 2*2 fiber coupler
(1105) light beam come out passed through collimating mirror before this and then impinged upon on galvanometer, final by condenser lens after the reflection of galvanometer
It penetrates on finger sample, optical fiber collimator F260APC-C, NA=0.16, f=15.52, the light beam 1/e of output2Diameter is
2.74mm；Condenser lens D=30mm, f=50mm；
The spectrometer (1103) is used to detect the interference signal of spectrum, the collimating mirror D=30mm, f=90mm of spectrometer；Spectrum
Instrument focus lamp D=50.8mm, f=75mm；Projection grating manufacturer is Wasatch Photonics, and dimension D=50.8mm is thick
Degree is 6mm, and central wavelength 1310nm, incisure density is 1145 lines/mm, and the line array CCD applied uses SENSORS company
GL2048R line array CCD, pixel number are 2048, and single Pixel size is 10um*210um, and maximum sample frequency is reachable
147kHz；
The galvanometer (1104) is a pair of of X galvanometer and Y galvanometer, changes the direction of light beam by the control to galvanometer (1104), makes
The position that finger sample beam must be radiated at changes, and can collect the finger sample of certain area, the galvanometer (1104)
For big nation's motor medical treatment galvanometer, mating easily to pacify sharp MC800 laser marking control card, X galvanometer eyeglass is with Y galvanometer eyeglass
Edmund protects golden reflecting mirror, having a size of 12.5mm*12.5mm and 12.5mm*17.5mm；
Branch of the 2*2 fiber coupler (1105) for realizing optical signal, splitting ratio 50:50 are equipped with four FC/
APC connector, the end face of FC/APC connector are inclined；
The 1310nm wideband light source (1106) provides light source to finger OCT information acquisition module (1100) for being responsible for, and uses
IPSDS1307C wideband light source, the light source center wavelength are 1310nm, three dB bandwidth 75nm, output power 15mW.
6. the multi-modal characteristic synchronization acquisition system of a kind of finger as described in one of claims 1 to 3, it is characterised in that: described
In support module (1200), CameraLink (1201) interface passes through two CameraLink lines for line array CCD and capture card phase
Connection；Network interface (1202) realizes the connection of industrial camera (1001) and (1400) that calculate；PCIe interface (1203) will acquire
Card is connect with computer (1400)；Computer (1400) is connected by USB3.0 interface (1204) with galvanometer control card, will control
Signal is transferred to galvanometer (1104), makes galvanometer (1104) according to control signal movement；The power supply of whole system supports to include monochrome
The 2.5V of parallel light source (1003), the 5V of 1310nm wideband light source (1106), industrial camera (1001), spectrometer (1103),
220V alternating current required for the 12V and computer (1400) of galvanometer (1104).
7. the multi-modal characteristic synchronization acquisition system of a kind of finger as described in one of claims 1 to 3, it is characterised in that: described
Finger OAG message processing module (1300) is used to obtain interference spectrum information before to handle, the letter of OAG required for obtaining
Breath；The interference spectrum information obtained before is first done into a Hilbert transform in scanning direction, is then Fu in other direction
In leaf transformation obtain required for finger OAG information.
8. the multi-modal characteristic synchronization acquisition system of a kind of finger as described in one of claims 1 to 3, it is characterised in that: described
Computer (1400) includes original data processing unit (1401), image processing unit (1402) and unit as the result is shown
(1403), original data processing unit (1401) handles obtained interference spectrum；Image processing unit (1402) to
To finger Epidermal Fingerprint, skin corium fingerprint, sweat gland, blood-stream image handled；Unit (1403) is by what is obtained as the result is shown
Final result is shown, is compared convenient for analysis.
9. a kind of multi-modal characteristic synchronization acquisition system of finger as claimed in claim 8, it is characterised in that: the initial data
In processing unit (1401), obtains OCT signal and be divided into following seven steps, the first step is intercepted to spectrum；Second step is
Light intensity is converted to light intensity with the letter of wave number k uniform transition with the function of CCD pixel even variation using interpolation coefficient by interpolation
Number；Third step is to subtract direct current, subtracts the DC quantity in interference spectrum to reduce the noise near zero light path；4th step is that dispersion is mended
It repays, subtracts dispersion additive phase in the phase term of spectrum after subtracting direct current；5th step carries out FFT step, using auto-power spectrum,
It completes to increase modulus on the basis of FFT, scales, takes unilateral operation；6th step is in order to enhance contrast, to the relationship of acquisition
Logarithm is taken to be obtained with intensity map；7th step defines the corresponding relationship of an intensity and rgb value, and intensity meaning is converted
It can be obtained by OCT two dimension pcolor；
It obtains OAG information and is divided into following seven steps, the first step pre-processes the original interference spectral signal of acquisition, packet
It includes and executes interception, interpolation, subtracts direct current, dispersion compensation processing；Second step is every a line of two-dimensional array after independent processing pretreatment,
Hilbert transform is carried out to each row；Third step is each column for individually handling new two-dimensional array, is carried out to each column
FFT；4th step is interception, because imaging depth and penetration capacity are limited in order to which the convenience of subsequent processing only needs appropriate interception portion
Divided data；5th step is modulus and logarithm, the logarithm of the interior point in access group, to increase intensity map contrast,
Intensity value and color value one-to-one correspondence can be obtained into pseudocolour picture；6th step laterally cuts obtained two-dimensional array, point
At two two-dimensional arrays, the two-dimensional array of top is the negative frequency component that FFT is obtained, and the two-dimensional array of lower section is what FFT was obtained
Positive frequency component respectively corresponds flow velocity planar strength figure and Static planar intensity map；7th step is to subtract each other to take to make an uproar, flat using static state
Face image, which does flow velocity flat image, subtracts each other processing, obtains new flow velocity flat image, has thus obtained finger subcutaneously micro- blood
The part of pipe；
The extraction of obtained finger OCT two dimension pcolor is spliced into complete finger corium by described image processing unit (1402)
Layer and sweat gland image, are spliced into the subcutaneous capilary image of complete finger for obtained finger OAG two dimension pcolor.
10. the multi-modal characteristic synchronization acquisition system of a kind of finger as described in one of claims 1 to 3, it is characterised in that: described
The multi-modal characteristic synchronization acquisition system of finger further include finger placement platform for placing Dove prism, not using black
Rust steel is made, and there is the hole for just putting down Dove prism in centre, and palm is put on the platform, and finger is placed exactly in putting for Dove prism
Seated position, convenient for the acquisition of data.
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