CN108985211A - A kind of criminal investigation fingerprint acquisition system - Google Patents
A kind of criminal investigation fingerprint acquisition system Download PDFInfo
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- CN108985211A CN108985211A CN201810736280.0A CN201810736280A CN108985211A CN 108985211 A CN108985211 A CN 108985211A CN 201810736280 A CN201810736280 A CN 201810736280A CN 108985211 A CN108985211 A CN 108985211A
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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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Abstract
The invention discloses a kind of criminal investigation fingerprint acquisition systems.The system includes: multiple shadowless lamps and multiple cameras to be provided on the inner wall of cabinet, and each camera is different from the relative position of plane and relative angle where the bottom opening of cabinet；Controller, camera control module, fingerprint image acquisition module, position mark module, image processing module and error range estimation block are provided in control box.The present invention needs to acquire the top of fingerprint by the way that cabinet to be placed on, it opens shadowless lamp and camera carries out fingerprint image acquisition, influence of the illumination to fingerprint image acquisition when avoiding the possibility and acquisition of fingerprint scene destruction, to realize non-contact, nondestructive measurement, it can overcome the shortcomings of traditional detecting site fingerprint collecting, especially for the fingerprint of weak amplitude information, or the fingerprint that amplitude is clear but information is not complete, fusion can be carried out by multi-faceted fingerprint grayscale information abundant and fingerprint texture information obtains accurately finger print information.
Description
Technical field
The present invention relates to criminal investigation fields, more particularly relate to a kind of criminal investigation fingerprint acquisition system.
Background technique
With the development of the society, the technology using fingerprint individual verification is very mature, in civil field especially door
It is applied more and more widely by favor in the fields such as taboo, security protection, finance；Fingerprint individual verification technology is in public security punishment simultaneously
Thing investigation field has also obtained applying more and more widely.
Finger print identifying, which is used as in biological characteristic authentication, has very high reliability and cost performance, has become and works as previous existence
The mainstream of object certification.Fingerprint sensor in existing fingerprint acquisition system mostly uses greatly the fingerprint sensor of purely capacitive formula, leads to
The acquisition mode for crossing contact carries out fingerprint collecting.However, being typically required in public security criminal investigation field to suspect
It leaves finger print information at the scene and carries out contactless acquisition, due to finger print information often weak, the scene of a crime than shallower at scene
If the fingerprint left cannot be displayed effectively, information extraction and fingerprint identification after can not just carrying out are applied at present
In detecting site fingerprint manifestation technology there are many kinds of, the most commonly used is adding background color to show, therefore carry out fingerprint collecting at the scene
When available light be that there is significant impact to the extraction of fingerprint characteristic an important factor for influencing fingerprint collecting.
Summary of the invention
The embodiment of the present invention provides a kind of criminal investigation fingerprint acquisition system, to solve existing in the prior art ask
Topic.
The embodiment of the present invention provides a kind of criminal investigation fingerprint acquisition system, comprising: cabinet；
The bottom opening of the cabinet；Multiple shadowless lamps are provided on the inner wall of the cabinet；On the inner wall of the cabinet
It is provided with multiple cameras, and the relative position of plane and relative angle where the bottom opening of each camera and the cabinet
Degree is different；The cabinet is provided with control box and Inkpad box on outer top surface；Controller, camera control are provided in the control box
Molding block, fingerprint image acquisition module, position mark module, image processing module and error range estimation block, and the control
Device processed respectively with the shadowless lamp, camera, the camera control module, the fingerprint image acquisition module, described
Position mark module, described image processing module and error range estimation block electrical connection；
The camera control module works for opening the camera one by one according to preset time spacing；
The fingerprint image acquisition module, suspect's left fingerprints image at the bottom opening for obtaining the cabinet
Or the fingerprint image on fingerprint-collection paper, wherein the area of fingerprint-collection paper is greater than the area of the bottom opening of the cabinet；
The position mark module, for every width fingerprint image to be associated number mark with the corresponding camera
Note；
Described image processing module includes: that sundries filters out unit and feature extraction unit；The sundries filters out unit, is used for
According to the texture information and corresponding grayscale information in all fingerprint images, the sundries point of the non-fingerprint characteristic of automatic rejection, and from
It is dynamic to repair information in fingerprint；The feature extraction unit, for obtaining texture information and corresponding gray scale in fingerprint image
The characteristic information of information；
The error range estimation block, for according to the texture information and corresponding grayscale information in all fingerprint images
Maximum value and minimum value, determine the error range of the texture information and corresponding grayscale information at characteristic point.
Further, weight gain plate is provided at the top of the cabinet.
Further, locating module is additionally provided in the control box；The locating module is electrically connected with the controller.
Further, long-range sharing module is additionally provided in the control box；The long-range sharing module and the control
Device electrical connection, and the long-range sharing module will treated finger print information and allowable error model for unit by wireless communication
Information is enclosed to be transmitted on remote control center or designated mobile phone.
Further, human-computer interaction module is additionally provided in the control box；The human-computer interaction module and the control
Device electrical connection, and the human-computer interaction module for control the opening and closing of the shadowless lamp, the unlatching of the camera and
Close and be arranged different phone numbers.
Further, the controller uses the microprocessor of model S3C2410.
Further, the fingerprint on the fingerprint-collection paper is printed on fingerprint-collection paper by ink paste from suspect scene
On fingerprint.
In the embodiment of the present invention, a kind of criminal investigation fingerprint acquisition system is provided, compared with prior art, beneficial to effect
Fruit is as follows:
The present invention shows fingerprint by adding background color to show, and is then placed on cabinet and needs to acquire the upper of fingerprint
Side, opens shadowless lamp and camera carries out fingerprint image acquisition, avoids the possibility of fingerprint scene destruction, while avoiding acquisition
Influence of the Shi Guangzhao to fingerprint image acquisition can overcome traditional detecting site fingerprint to realize non-contact, nondestructive measurement
The deficiency of acquisition carries out multi collect in the case where not destroying fingerprint, compares compared with conventional method, can provide for the police in many ways
Position fingerprint grayscale information abundant and fingerprint texture information, fingerprint or amplitude especially for weak amplitude information are clear but believe
Infull fingerprint is ceased, fusion can be carried out by multi-faceted fingerprint grayscale information abundant and fingerprint texture information and is obtained accurately
Finger print information.
The present invention is not only at low cost, easy to carry, easy to operate, and passes through multi-angle multi collect fingerprint image, energy
It reaches the analysis according to texture information and corresponding grayscale information in all fingerprint images, mutually compensate, the non-fingerprint of automatic rejection
The sundries point of feature, and be automatically repaired information in fingerprint can be used as that public security is criminal to be detectd to realize the precise acquisition of fingerprint
The reliable reference data looked into.
The present invention passes through the error model of texture information and corresponding grayscale information at characteristic point after carrying out fingerprint collecting
It encloses, threshold values can be compared in practical applications with adjust automatically, and provide error rate, convenient for analyzing the confidence level of authentication.
Detailed description of the invention
Fig. 1 is a kind of criminal investigation fingerprint acquisition system functional block diagram provided in an embodiment of the present invention；
Fig. 2 is a kind of criminal investigation fingerprint acquisition system structural schematic diagram provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1 and Fig. 2, a kind of criminal investigation fingerprint acquisition system provided in an embodiment of the present invention, comprising: cabinet 1；
The bottom opening of cabinet 1；Multiple shadowless lamps 2 are provided on the inner wall of cabinet 1；Multiple cameras are provided on the inner wall of cabinet 1
3, and each camera 3 is different from the relative position of plane and relative angle where the bottom opening of cabinet 1；On the outer top surface of cabinet 1
It is provided with control box 4 and Inkpad box 5；Controller 41, camera control module 42, fingerprint image acquisition are provided in control box 4
Module 43, position mark module 44, image processing module 45 and error range estimation block 46, and controller 41 respectively with no shadow
Lamp 2, camera 3, camera control module 42, fingerprint image acquisition module 43, position mark module 44, image processing module 45
It is electrically connected with error range estimation block 46.
In actual use, it is exactly the appearing technique of latent fingerprint one of the problem of most critical in fingerprint identification technology, violates
Information extraction and fingerprint identification if the fingerprint that guilty scene is left cannot be displayed effectively, after can not just carrying out.Mesh
There are many kinds of the preceding technologies applied to detecting site fingerprint manifestation, can be divided by colour developing principle classification: adding background color to show, is chemical anti-
It should show, physical and chemical effect shows, laser appearance method.Firstly, being shown by adding background color to show to fingerprint, then, by cabinet 1
It is placed on the top for needing to acquire fingerprint, shadowless lamp is opened and camera carries out fingerprint image acquisition, it is broken to avoid fingerprint scene
Bad possibility, while influence of the illumination to fingerprint image acquisition when avoiding acquisition, so that non-contact, nondestructive measurement is realized,
It can overcome the shortcomings of traditional detecting site fingerprint collecting, multi collect, more traditional side are carried out in the case where not destroying fingerprint
Method is compared, and multi-faceted fingerprint grayscale information abundant and fingerprint texture information can be provided for the police, especially for weak amplitude
The fingerprint that the fingerprint or amplitude of information are clear but information is not complete, can pass through multi-faceted fingerprint grayscale information abundant and fingerprint
Texture information carries out fusion and obtains accurately finger print information.
Further, the top of cabinet 1 is provided with weight gain plate 11, ensure that cabinet 1 and base contact surface to a certain extent
It is seamless unglazed.
The concrete function of above-mentioned each module is described as follows:
Wherein, camera control module 42 work for opening camera 3 one by one according to preset time spacing.
Wherein, fingerprint image acquisition module 43, suspect's left fingerprints image at the bottom opening for obtaining cabinet 1
Or the fingerprint image on fingerprint-collection paper, wherein the area of fingerprint-collection paper is greater than the area of the bottom opening of cabinet 1, is convenient for
Entirely it is pressed in 1 lower section of cabinet.
It should be noted that the fingerprint on fingerprint-collection paper is printed on fingerprint-collection paper by ink paste from suspect scene
On fingerprint.
Wherein, position mark module 44, for every width fingerprint image to be associated number mark with corresponding camera 3
Note.
Wherein, image processing module 45 includes: that sundries filters out unit 451 and feature extraction unit 452；Sundries filters out unit
451, for according to the texture information and corresponding grayscale information in all fingerprint images, the sundries of the non-fingerprint characteristic of automatic rejection
Point, and it is automatically repaired information in fingerprint；Feature extraction unit 452, for obtaining texture information and correspondence in fingerprint image
Grayscale information characteristic information.
Wherein, error range estimation block 46, for according in all fingerprint images texture information and corresponding gray scale
The maximum value and minimum value of information determine the error range of the texture information and corresponding grayscale information at characteristic point.
It should be noted that reliability and safety in order to guarantee authentication, usual scheduled fixed threshold values is all set
It sets higher.Due to being influenced by factors such as air themperature humidity, sensor ageing and dry and wet fingers, collected by fingerprint instrument
Fingerprint image quality it is often bad.If scheduled fixed threshold values setting is too high, it is unsuccessfully and higher to will lead to fingerprint authentication
Reject rate influences fingerprint comparison efficiency；If scheduled fixed threshold values is relatively low, and can generate higher misclassification rate, influence reliable
Property and safety.Therefore, the setting of reservation threshold is particularly critical in fingerprint authentication.Existing fingerprint verification system compares threshold values
It is set in advance as changeless numerical value, the safety of authentication can not be influenced according to actual use situation adjust automatically
And working efficiency.However, error range of the present invention by texture information and corresponding grayscale information at characteristic point, in reality
It is pre- threshold values can be compared with adjust automatically in, and provides error rate, convenient for analyzing the confidence level of authentication.
Preferably, being additionally provided with locating module 47 in control box 4；Locating module 47 is electrically connected with controller 41；It obtains in real time
Know the job site of criminal investigation staff.
Preferably, being additionally provided with long-range sharing module 48 in control box 4；Long-range sharing module 48 is electrically connected with controller 41
It connects, and long-range sharing module 48 passes treated finger print information and allowable error range information for unit by wireless communication
It transports on remote control center or designated mobile phone.
It should be noted that existing fingerprint acquisition device hardly has communication capacity, a large amount of fingerprint is being acquired, only
It can be first stored in storage card, carry out unified arrangement again afterwards, it is time-consuming and laborious.With wireless communication technique and smart phone
Development, so that the processing speed of mobile phone is getting faster, the compatibility and programmability of operating system are higher and higher；Wirelessly communicate skill
Art, especially near-field communication technology are getting faster transmission rate, everything all provides solution in order to solve the above problem and thinks
Road.
Preferably, being additionally provided with human-computer interaction module 49 in control box 4；Human-computer interaction module 49 is electrically connected with controller 41
It connects, and human-computer interaction module 49 is different for controlling the opening and closing of shadowless lamp 2, the opening and closing of camera 3 and setting
Phone number.
It should be noted that the controller 41 in the present invention uses the microprocessor of model S3C2410.
In conclusion the present invention shows fingerprint by adding background color to show, then cabinet is placed on and needs to acquire
The top of fingerprint, opens shadowless lamp and camera carries out fingerprint image acquisition, avoids the possibility of fingerprint scene destruction, keeps away simultaneously
Influence of the illumination to fingerprint image acquisition can overcome traditional criminal investigation to realize non-contact, nondestructive measurement when having exempted from acquisition
The deficiency of fingerprint on site acquisition, multi collect is carried out in the case where not destroying fingerprint, is compared compared with conventional method, can be the police
Multi-faceted fingerprint grayscale information abundant and fingerprint texture information are provided, especially for the fingerprint or amplitude of weak amplitude information
Clear but infull information fingerprint can carry out fusion by multi-faceted fingerprint grayscale information abundant and fingerprint texture information and obtain
Obtain accurately finger print information.
Further, the present invention is not only at low cost, easy to carry, easy to operate, and is referred to by multi-angle multi collect
Print image, can according to the analysis of texture information and corresponding grayscale information in all fingerprint images, mutually compensate, pick automatically
Unless the sundries point of fingerprint characteristic, and it is automatically repaired information in fingerprint, to realize the precise acquisition of fingerprint, it can be used as public affairs
Pacify the reliable reference data of criminal investigation.
Further, the present invention passes through the texture information and corresponding gray scale letter at characteristic point after carrying out fingerprint collecting
The error range of breath can compare threshold values in practical applications with adjust automatically, and provide error rate, convenient for analysis authentication
Confidence level.
Disclosed above is only several specific embodiments of the invention, and those skilled in the art can carry out the present invention
Various modification and variations without departing from the spirit and scope of the present invention, if these modifications and changes of the present invention belongs to the present invention
Within the scope of claim and its equivalent technologies, then the present invention is also intended to include these modifications and variations.
Claims (7)
1. a kind of criminal investigation fingerprint acquisition system characterized by comprising cabinet (1)；
The bottom opening of the cabinet (1)；Multiple shadowless lamps (2) are provided on the inner wall of the cabinet (1)；The cabinet (1)
Inner wall on be provided with multiple cameras (3), and plane where the bottom opening of each camera (3) and the cabinet (1)
Relative position and relative angle it is different；Control box (4) and Inkpad box (5) are provided on the outer top surface of the cabinet (1)；The control
Controller (41), camera control module (42), fingerprint image acquisition module (43), position mark mould are provided in box (4) processed
Block (44), image processing module (45) and error range estimation block (46), and the controller (41) respectively with the no shadow
Lamp (2), the camera (3), the camera control module (42), the fingerprint image acquisition module (43), the position
Mark module (44), described image processing module (45) and the error range estimation block (46) electrical connection；
The camera control module (42), for opening the camera (3) work one by one according to preset time spacing；
The fingerprint image acquisition module (43), suspect's left fingerprints at bottom opening for obtaining the cabinet (1)
Fingerprint image on image or fingerprint-collection paper, wherein the area of fingerprint-collection paper is greater than the bottom opening of the cabinet (1)
Area；
The position mark module (44), for every width fingerprint image to be associated number with the corresponding camera (3)
Label；
Described image processing module (45) includes: that sundries filters out unit (451) and feature extraction unit (452)；The sundries filter
Except unit (451), for according to the texture information and corresponding grayscale information in all fingerprint images, the non-fingerprint of automatic rejection to be special
The sundries point of sign, and it is automatically repaired information in fingerprint；The feature extraction unit (452), for obtaining in fingerprint image
The characteristic information of texture information and corresponding grayscale information；
The error range estimation block (46), for according to the texture information and corresponding grayscale information in all fingerprint images
Maximum value and minimum value, determine the error range of the texture information and corresponding grayscale information at characteristic point.
2. criminal investigation fingerprint acquisition system as described in claim 1, which is characterized in that set at the top of the cabinet (1)
It is equipped with weight gain plate (11).
3. criminal investigation fingerprint acquisition system as described in claim 1, which is characterized in that also set in the control box (4)
It is equipped with locating module (47)；The locating module (47) is electrically connected with the controller (41).
4. criminal investigation fingerprint acquisition system as described in claim 1, which is characterized in that also set in the control box (4)
It is equipped with long-range sharing module (48)；The long-range sharing module (48) is electrically connected with the controller (41), and described long-range point
It enjoys module (48) and is transmitted to treated finger print information and allowable error range information remotely for unit by wireless communication
In control centre or designated mobile phone.
5. criminal investigation fingerprint acquisition system as claimed in claim 4, which is characterized in that also set in the control box (4)
It is equipped with human-computer interaction module (49)；The human-computer interaction module (49) is electrically connected with the controller (41), and the man-machine friendship
Mutual module (49) is for controlling the opening and closing of the shadowless lamp (2), the opening and closing of the camera (3) and setting
Different phone numbers.
6. criminal investigation fingerprint acquisition system as described in claim 1, which is characterized in that the controller (41) uses type
Number be S3C2410 microprocessor.
7. criminal investigation fingerprint acquisition system as described in claim 1, which is characterized in that the finger on the fingerprint-collection paper
Line is printed on the fingerprint on fingerprint-collection paper by ink paste from suspect scene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810736280.0A CN108985211B (en) | 2018-07-02 | 2018-07-02 | Criminal investigation is with fingerprint collection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810736280.0A CN108985211B (en) | 2018-07-02 | 2018-07-02 | Criminal investigation is with fingerprint collection system |
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| Publication Number | Publication Date |
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| CN108985211A true CN108985211A (en) | 2018-12-11 |
| CN108985211B CN108985211B (en) | 2022-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810736280.0A Active CN108985211B (en) | 2018-07-02 | 2018-07-02 | Criminal investigation is with fingerprint collection system |
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| CN109657670A (en) * | 2018-12-19 | 2019-04-19 | 陕西天隆智慧安防科技有限公司 | One kind is field integrated to investigate case and its control system on the spot |
| CN109977879A (en) * | 2019-03-28 | 2019-07-05 | 山东省计算中心（国家超级计算济南中心） | A kind of acquisition of fingerprint on site matches control methods and system with long-range |
| CN109977889A (en) * | 2019-03-29 | 2019-07-05 | 杭州知天电子商务有限公司 | A kind of fingerprint capturer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109657670A (en) * | 2018-12-19 | 2019-04-19 | 陕西天隆智慧安防科技有限公司 | One kind is field integrated to investigate case and its control system on the spot |
| CN109977879A (en) * | 2019-03-28 | 2019-07-05 | 山东省计算中心（国家超级计算济南中心） | A kind of acquisition of fingerprint on site matches control methods and system with long-range |
| CN109977889A (en) * | 2019-03-29 | 2019-07-05 | 杭州知天电子商务有限公司 | A kind of fingerprint capturer |
| CN109977889B (en) * | 2019-03-29 | 2021-04-30 | 深圳市利成兴科技有限公司 | Fingerprint collector |
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| CN108985211B (en) | 2022-08-12 |
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