CN110008852A - Fingerprint collecting method, system and storage medium - Google Patents
Fingerprint collecting method, system and storage medium Download PDFInfo
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- CN110008852A CN110008852A CN201910198378.XA CN201910198378A CN110008852A CN 110008852 A CN110008852 A CN 110008852A CN 201910198378 A CN201910198378 A CN 201910198378A CN 110008852 A CN110008852 A CN 110008852A
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000003384 imaging method Methods 0.000 claims abstract description 11
- 230000009466 transformation Effects 0.000 claims description 45
- 230000004927 fusion Effects 0.000 claims description 13
- 238000002845 discoloration Methods 0.000 claims description 6
- 238000013178 mathematical model Methods 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
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- 239000003990 capacitor Substances 0.000 description 1
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/1347—Preprocessing; Feature extraction
Abstract
The invention discloses a kind of fingerprint collecting method, system and storage mediums, the method is applied to fingerprint acquisition system, the system comprises at least two for acquiring the imaging sensor of finger different angle image, it the described method comprises the following steps: obtaining the finger different angle image that described image sensor takes；Image mosaic processing is carried out to the finger different angle image, the image after obtaining splicing；Image after the splicing is handled, finger print information image is obtained.Compared with the existing technology, the present invention can once form complete finger print information, so that the efficiency and accuracy of fingerprint collecting are promoted, to meet the use demand of different scenes.
Description
Technical field
The present invention relates to technical field of computer vision more particularly to a kind of fingerprint collecting methods, system and storage medium.
Background technique
Fingerprint collecting is an important project in computer vision field, and main task is acquired out from finger-image
Clearly finger print information, needs accurately to identify the specific category of fingerprint characteristic, and provides the bounding box of each fingerprint characteristic.
Since the factors such as visual angle, posture cause fingerprint characteristic, deformation occurs, and fingerprint collecting is caused to become a challenging task.
Conventional fingerprint acquisition method is broadly divided into optical ftngetpnnt acquisidon and capacitance type fingerprint acquisition.Optical fingerprint is adopted
With CCD or cmos image sensor, using the plane finger print information image for being imprinted on surface in shooting form, being formed includes fingerprint
Crestal line (with the streakline of one fixed width and trend in fingerprint image) is white in black, valley line (depressed section between streakline)
It is digitized, can be by the multi-grayscale fingerprint image of fingerprint equipment algorithm process.Optical ftngetpnnt acquisidon limitation is embodied in potential
In terms of finger mark (potential finger mark is that finger is left on platen as after complete), the quality of fingerprint image can be not only reduced, when serious
It is also possible to lead to 2 finger mark overlappings, it is clear that be difficult to meet practical application needs.In addition, platen coating and ccd array can be at any time
Between passage generate loss, may cause acquisition fingerprint image quality decline.
The device of fingerprint collecting technology based on semiconductor silicon capacity effect is widely used on the electronic products such as mobile phone.Silicon
Sensor becomes a pole plate of capacitor, and finger is then another pole plate, using the ridge and paddy of finger line relative to smooth silicon
Capacitance difference between sensor forms gray level image.Capacitance sensor issues electronic signal, and electronic signal passes through the table of finger
Face and dead skin layer, the living body layer (skin corium) for the finger skin that goes directly, directly read fingerprint pattern.Due to going deep into skin corium,
Sensor can capture more truthful datas, not the influence vulnerable to finger surface dustiness, improve identification accuracy rate, effectively prevent distinguishing
Know mistake.
Newest fingerprint collecting technology also uses ultrasonic sensor, using ultrasonic wave feedback realize fingerprint ridge line and
The acquisition of valley line.
Either photo-electric, condenser type or capacitive fingerprint acquisition device, major problem is that can only acquire flat
The finger print information in face, i.e., the finger print information for being only fitted in fingerprint acquisition device surface can be collected, in certain needs
The special industry (such as criminal investigation) of all fingers finger print information is acquired, these acquisition modes are unable to satisfy actual application demand.
Summary of the invention
It is a primary object of the present invention to propose a kind of fingerprint collecting method, system and storage medium, it is intended to promote fingerprint
The efficiency and accuracy of acquisition, to meet the use demand of different scenes.
To achieve the above object, the present invention provides a kind of fingerprint collecting method, and the method is applied to fingerprint acquisition system,
The system comprises at least two for acquiring the imaging sensor of finger different angle image, the method includes following steps
It is rapid:
Obtain the finger different angle image that described image sensor takes；
Image mosaic processing is carried out to the finger different angle image, the image after obtaining splicing；
Image after the splicing is handled, finger print information image is obtained.
Further technical solution of the invention is, described to carry out at image mosaic to the finger different angle image
The step of reason, image after obtaining splicing includes:
The LOHF feature of the finger different angle image is extracted, image registration is carried out, obtains and finger difference angle
The corresponding image to be spliced of the image of degree；
The image to be spliced corresponding with the finger different angle image is subjected to image co-registration processing, is melted
Close treated image；
The step of image to after the splicing handles, obtains finger print information image include:
Image after the fusion treatment is handled, finger print information image is obtained.
Further technical solution of the invention is the step of the LOHF feature for extracting the finger different angle image
Suddenly include:
To the Digital Image Processing of the finger different angle image, the matching template for establishing image and image transformation,
Wherein, the Digital Image Processing includes denoising, and/or edge extracting, and/or histogram treatment, described image transformation
Including Fourier transformation, and/or wavelet transformation.
The step of further technical solution of the invention is, the progress image registration include:
Using preset matching strategy, template in image to be spliced or characteristic point corresponding position in a reference image are obtained
It sets, determines the transformation relation between image and reference picture to be spliced.
Further technical solution of the invention is, described to use preset matching strategy, obtains in image to be spliced
Template or characteristic point corresponding position in a reference image, determine the step of the transformation relation between image and reference picture to be spliced
Suddenly include:
According to the corresponding relationship between template or characteristics of image, each parameter value in mathematical model is calculated, institute is established
State the mathematical transformation model between stitching image and reference picture；
According to the mathematical transformation model, the image to be spliced is transformed into the coordinate system of reference picture, completes system
One coordinate transform；
According to coordinate transform after reunification, the transformation relation between image and reference picture to be spliced is determined.
Further technical solution of the invention is that the image to after the fusion treatment is handled, and is referred to
The step of line information image includes:
Processing, and/or discoloration processing are sharpened to the image after the fusion treatment, obtain finger print information image.
To achieve the above object, the present invention also proposes a kind of fingerprint acquisition system, and the system comprises at least two to be used for
The imaging sensor and memory, processor, the fingerprint being stored on the memory for acquiring finger different angle image are adopted
Collect program, the fingerprint collecting program performs the steps of when being run by the processor
Obtain the finger different angle image that described image sensor takes；
Image mosaic processing is carried out to the finger different angle image, the image after obtaining splicing；
Image after the splicing is handled, finger print information image is obtained.
Further technical solution of the invention is, also realized when the fingerprint collecting program is run by the processor with
Lower step:
The LOHF feature of the finger different angle image is extracted, image registration is carried out, obtains and finger difference angle
The corresponding image to be spliced of the image of degree；
The image to be spliced corresponding with the finger different angle image is subjected to image co-registration processing, is melted
Close treated image；
Image after the fusion treatment is handled, finger print information image is obtained.
Further technical solution of the invention is, also realized when the fingerprint collecting program is run by the processor with
Lower step:
To the Digital Image Processing of the finger different angle image, the matching template for establishing image and image transformation,
Wherein, the Digital Image Processing includes denoising, and/or edge extracting, and/or histogram treatment, described image transformation
Including Fourier transformation, and/or wavelet transformation.
To achieve the above object, the present invention also proposes a kind of computer readable storage medium, the computer-readable storage
Fingerprint collecting program is stored on medium, the fingerprint collecting program realizes the step of method as described above when being run by processor
Suddenly.
The beneficial effects of the present invention are: fingerprint collecting method of the present invention, system and storage medium, pass through above-mentioned technical side
Case obtains the finger different angle image that imaging sensor takes；Image mosaic is carried out to the finger different angle image
Processing, the image after obtaining splicing；Image after the splicing is handled, finger print information image, phase are obtained
For the prior art, complete finger print information can be once formed, so that the efficiency and accuracy of fingerprint collecting are promoted, to meet not
With the use demand of scene.
Detailed description of the invention
Fig. 1 is the flow diagram of fingerprint collecting method preferred embodiment of the present invention；
Fig. 2 is the refinement flow diagram of step S20 in Fig. 1.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
In view of current fingerprint acquisition device is all single plane finger print information acquisition mode, the information of fingerprint collecting
Amount is few comprising content, is unable to satisfy the application demand of special screne, is all using image acquiring sensor in image processing section
The information in fingerprint directly formed does not carry out image mosaic processing, causes the efficiency for acquiring fingerprint and accuracy low, and not
It is able to satisfy practical application request, the present invention proposes a kind of fingerprint collecting method as a result,.
Fingerprint collecting method institute of the present invention is main the technical solution adopted is that by multiple images sensor to the same hand
Fingering row is taken pictures, and is then handled by image mosaic, and the picture comprising finger whole finger print information is combined into, can a shape
At complete finger print information, and guarantee the more comprehensive of finger print information acquisition, so that the efficiency and accuracy of fingerprint collecting are promoted,
To meet the use demand of different scenes.
Specifically, please referring to Fig. 1, Fig. 1 is the flow diagram of fingerprint collecting method preferred embodiment of the present invention.
It is understood that the fingerprint collecting method that the present embodiment is proposed is applied to fingerprint acquisition system, the system
Including at least two for acquiring the imaging sensor of finger different angle image, wherein described image sensor can use
Camera, at least two camera can clearly shoot the fingerprint image on finger.
Specifically, the fingerprint collecting method that the present embodiment is proposed the following steps are included:
Step S10 obtains the finger different angle image that described image sensor takes.
When it is implemented, camera can be carried out arc in the certain radius of central point in fingerprint acquisition device
Arrangement, and guarantee there are enough intersections between the image shot according to camera angle and adjacent camera shooting image,
If intersection is insufficient, can increase camera number or increase camera can shooting angle.
Step S20 carries out image mosaic processing to the finger different angle image, the image after obtaining splicing.
Specifically, carrying out image mosaic processing to the finger different angle image includes image registration and image co-registration weight
Structure processing.
Wherein, image registration refers to: will extract LOHF (Local Oriented Harris Feature) feature of image
It is registrated.LOHF feature mainly includes two parts: (1) Harris angle point and its triangular angular of local adjacent edge, by
This defines 4 dimensional characteristics descriptors；(2) Rankine-Hugoniot relations between difference LOHF on directed edge chain, thus divides characteristic point
Subset finds out template in image to be spliced or characteristic point corresponding position in a reference image, so determine two images it
Between transformation relation.
Image co-registration refers to, the overlapping region of stitching image is merged to obtain the smooth and seamless panorama sketch of splicing reconstruct
Picture.
Step S30 handles the image after the splicing, obtains finger print information image.
For example, processing, and/or discoloration processing can be sharpened to the image after the splicing, with obtain it is clear,
Accurate finger print information image.
Further, as shown in Fig. 2, in the present embodiment, above-mentioned steps S20 can specifically include following sub-step:
Step S201 extracts the LOHF feature of the finger different angle image, carries out image registration, obtains and the hand
Refer to the corresponding image to be spliced of image of different angle.
When it is implemented, can Digital Image Processing to the finger different angle image, establish the matching mould of image
Plate and image transformation, wherein the Digital Image Processing includes at denoising, and/or edge extracting, and/or histogram
Reason, described image transformation include Fourier transformation, and/or wavelet transformation.
When carrying out image registration, preset matching strategy can be used, the template or feature in image to be spliced are obtained
Corresponding position in a reference image is put, determines the transformation relation between image and reference picture to be spliced.
Specifically, can be calculated each in mathematical model first according to the corresponding relationship between template or characteristics of image
Parameter value establishes the mathematical transformation model between the stitching image and reference picture.
Then according to the mathematical transformation model, the image to be spliced is transformed into the coordinate system of reference picture, it is complete
It is converted at uniform coordinate；
Further according to coordinate transform after reunification, the transformation relation between image and reference picture to be spliced is determined.
Step S202 carries out the image to be spliced corresponding with the finger different angle image at image co-registration
Reason, the image after obtaining fusion treatment.
In the step of above-mentioned steps S30 handles the image after the splicing, obtains finger print information image,
Processing mainly is sharpened to the image after fusion treatment, and/or discoloration is handled, obtains clearly finger print information image.
Fingerprint collecting method of the present invention is through the above technical solutions, obtain the finger different angle that imaging sensor takes
Image；Image mosaic processing is carried out to the finger different angle image, the image after obtaining splicing；To the stitching portion
Image after reason is handled, and finger print information image is obtained, and compared with the existing technology, can once form complete finger print information,
To promote the efficiency and accuracy of fingerprint collecting, to meet the use demand of different scenes.
To achieve the above object, the present invention also proposes a kind of fingerprint acquisition system, and the system comprises at least two to be used for
The imaging sensor and memory, processor, the fingerprint being stored on the memory for acquiring finger different angle image are adopted
Collect program, the fingerprint collecting program performs the steps of when being run by the processor
Obtain the finger different angle image that described image sensor takes；
Image mosaic processing is carried out to the finger different angle image, the image after obtaining splicing；
Image after the splicing is handled, finger print information image is obtained, wherein can be to the stitching portion
Image after reason is sharpened processing, and/or discoloration processing.
It is understood that fingerprint acquisition system of the present invention, including at least two for acquiring finger different angle image
Imaging sensor, wherein described image sensor can use camera, which can clearly shoot hand
Fingerprint image on finger.
When it is implemented, camera can be carried out arc in the certain radius of central point in fingerprint acquisition device
Arrangement, and guarantee there are enough intersections between the image shot according to camera angle and adjacent camera shooting image,
If intersection is insufficient, can increase camera number or increase camera can shooting angle.
Carrying out image mosaic processing to the finger different angle image includes that image registration and image- fused-reconstruction are handled.
Wherein, image registration refers to: will extract LOHF (Local Oriented Harris Feature) feature of image
It is registrated.LOHF feature mainly includes two parts: (1) Harris angle point and its triangular angular of local adjacent edge, by
This defines 4 dimensional characteristics descriptors；(2) Rankine-Hugoniot relations between difference LOHF on directed edge chain, thus divides characteristic point
Subset finds out template in image to be spliced or characteristic point corresponding position in a reference image, so determine two images it
Between transformation relation.
Image co-registration refers to, the overlapping region of stitching image is merged to obtain the smooth and seamless panorama sketch of splicing reconstruct
Picture.
Further, it is also performed the steps of when the fingerprint collecting program is run by the processor
The LOHF feature of the finger different angle image is extracted, image registration is carried out, obtains and finger difference angle
The corresponding image to be spliced of the image of degree；
The image to be spliced corresponding with the finger different angle image is subjected to image co-registration processing, is melted
Close treated image.
Image after the fusion treatment is handled, finger print information image is obtained.
When it is implemented, can Digital Image Processing to the finger different angle image, establish the matching mould of image
Plate and image transformation, wherein the Digital Image Processing includes at denoising, and/or edge extracting, and/or histogram
Reason, described image transformation include Fourier transformation, and/or wavelet transformation.
When carrying out image registration, preset matching strategy can be used, the template or feature in image to be spliced are obtained
Corresponding position in a reference image is put, determines the transformation relation between image and reference picture to be spliced.
Specifically, can be calculated each in mathematical model first according to the corresponding relationship between template or characteristics of image
Parameter value establishes the mathematical transformation model between the stitching image and reference picture.
Then according to the mathematical transformation model, the image to be spliced is transformed into the coordinate system of reference picture, it is complete
It is converted at uniform coordinate；
Further according to coordinate transform after reunification, the transformation relation between image and reference picture to be spliced is determined.
Wherein, the step of image after the splicing being handled, obtaining finger print information image, mainly to melting
It closing treated, image is sharpened processing, and/or discoloration processing, obtain clearly finger print information image.
Fingerprint acquisition system of the present invention is through the above technical solutions, obtain the finger different angle that imaging sensor takes
Image；Image mosaic processing is carried out to the finger different angle image, the image after obtaining splicing；To the stitching portion
Image after reason is handled, and finger print information image is obtained, and compared with the existing technology, can once form complete finger print information,
To promote the efficiency and accuracy of fingerprint collecting, to meet the use demand of different scenes.
To achieve the above object, the present invention also proposes a kind of computer readable storage medium, the computer-readable storage
It is stored with fingerprint collecting program on medium, is realized when the fingerprint collecting program is run by processor described in as above each embodiment
The step of method, which is not described herein again.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of fingerprint collecting method, which is characterized in that the method is applied to fingerprint acquisition system, and the system comprises at least
Two are used to acquire the imaging sensor of finger different angle image, the described method comprises the following steps:
Obtain the finger different angle image that described image sensor takes；
Image mosaic processing is carried out to the finger different angle image, the image after obtaining splicing；
Image after the splicing is handled, finger print information image is obtained.
2. fingerprint collecting method according to claim 1, which is characterized in that it is described to the finger different angle image into
The step of row image mosaic processing, image after obtaining splicing includes:
The LOHF feature of the finger different angle image is extracted, image registration is carried out, obtains and the finger different angle
The corresponding image to be spliced of image；
The image to be spliced corresponding with the finger different angle image is subjected to image co-registration processing, is obtained at fusion
Image after reason；
The step of image to after the splicing handles, obtains finger print information image include:
Image after the fusion treatment is handled, finger print information image is obtained.
3. fingerprint collecting method according to claim 2, which is characterized in that described to extract the finger different angle image
LOHF feature the step of include:
To the Digital Image Processing of the finger different angle image, the matching template for establishing image and image transformation,
In, the Digital Image Processing includes denoising, and/or edge extracting, and/or histogram treatment, described image transformation packet
Include Fourier transformation, and/or wavelet transformation.
4. fingerprint collecting method according to claim 3, which is characterized in that the step of progress image registration includes:
Using preset matching strategy, template in image to be spliced or characteristic point corresponding position in a reference image are obtained,
Determine the transformation relation between image and reference picture to be spliced.
5. fingerprint collecting method according to claim 4, which is characterized in that it is described to use preset matching strategy, it obtains
Template or characteristic point in image to be spliced corresponding position in a reference image, determine between image and reference picture to be spliced
Transformation relation the step of include:
According to the corresponding relationship between template or characteristics of image, each parameter value in mathematical model is calculated, the spelling is established
Mathematical transformation model between map interlinking picture and reference picture；
According to the mathematical transformation model, the image to be spliced is transformed into the coordinate system of reference picture, completes unified sit
Mark transformation；
According to coordinate transform after reunification, the transformation relation between image and reference picture to be spliced is determined.
6. fingerprint collecting method according to claim 2, which is characterized in that the image to after the fusion treatment into
Row processing, the step of obtaining finger print information image include:
Processing, and/or discoloration processing are sharpened to the image after the fusion treatment, obtain finger print information image.
7. a kind of fingerprint acquisition system, which is characterized in that the system comprises at least two for acquiring finger different angle figure
The imaging sensor and memory of picture, processor, the fingerprint collecting program being stored on the memory, the fingerprint are adopted
Collection program performs the steps of when being run by the processor
Obtain the finger different angle image that described image sensor takes；
Image mosaic processing is carried out to the finger different angle image, the image after obtaining splicing；
Image after the splicing is handled, finger print information image is obtained.
8. fingerprint acquisition system according to claim 7, which is characterized in that the fingerprint collecting program is by the processor
It is also performed the steps of when operation
The LOHF feature of the finger different angle image is extracted, image registration is carried out, obtains and the finger different angle
The corresponding image to be spliced of image；
The image to be spliced corresponding with the finger different angle image is subjected to image co-registration processing, is obtained at fusion
Image after reason；
Image after the fusion treatment is handled, finger print information image is obtained.
9. fingerprint acquisition system according to claim 8, which is characterized in that the fingerprint collecting program is by the processor
It is also performed the steps of when operation
To the Digital Image Processing of the finger different angle image, the matching template for establishing image and image transformation,
In, the Digital Image Processing includes denoising, and/or edge extracting, and/or histogram treatment, described image transformation packet
Include Fourier transformation, and/or wavelet transformation.
10. a kind of computer readable storage medium, which is characterized in that be stored with fingerprint on the computer readable storage medium and adopt
Collect program, the step such as method of any of claims 1-6 is realized when the fingerprint collecting program is run by processor
Suddenly.
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Citations (5)
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|---|---|---|---|---|
| CN103699885A (en) * | 2013-12-18 | 2014-04-02 | 格科微电子（上海）有限公司 | Optical fingerprint collecting method, optical fingerprint collecting device and portable type electronic device |
| CN105373786A (en) * | 2015-11-30 | 2016-03-02 | 东莞酷派软件技术有限公司 | Fingerprint acquisition method, fingerprint acquisition device and electronic device |
| CN105701768A (en) * | 2016-01-13 | 2016-06-22 | 四川长虹电器股份有限公司 | Panoramic reversing system based on image splicing and realization method thereof |
| CN109190554A (en) * | 2018-08-30 | 2019-01-11 | 深圳大学 | It is a kind of based on fingerprint and to refer to the 3D identifying system and method for vein |
| CN109409320A (en) * | 2018-11-08 | 2019-03-01 | Oppo广东移动通信有限公司 | Fingerprint collecting method and relevant device |
-
2019
- 2019-03-15 CN CN201910198378.XA patent/CN110008852A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103699885A (en) * | 2013-12-18 | 2014-04-02 | 格科微电子（上海）有限公司 | Optical fingerprint collecting method, optical fingerprint collecting device and portable type electronic device |
| CN105373786A (en) * | 2015-11-30 | 2016-03-02 | 东莞酷派软件技术有限公司 | Fingerprint acquisition method, fingerprint acquisition device and electronic device |
| CN105701768A (en) * | 2016-01-13 | 2016-06-22 | 四川长虹电器股份有限公司 | Panoramic reversing system based on image splicing and realization method thereof |
| CN109190554A (en) * | 2018-08-30 | 2019-01-11 | 深圳大学 | It is a kind of based on fingerprint and to refer to the 3D identifying system and method for vein |
| CN109409320A (en) * | 2018-11-08 | 2019-03-01 | Oppo广东移动通信有限公司 | Fingerprint collecting method and relevant device |
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Application publication date: 20190712 |
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