Manufacturing method of simulation fingerprint

A technology of fingerprints and fingerprint information, applied in coating and other directions, can solve problems such as rare extraction fields

Inactive Publication Date: 2019-03-26
广州市公安局网络警察支队 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Public security organs build fingerprint databases by collecting fingerprints. At present, the fingerprint databases of public security organs are mostly used for comparison and identification, or for research and analysis, or in the field of biological forensics. They are rarely used in the field of extraction of electronic evidence such as mobile phones. With the increasing importance of mobile phones to social life activities, forensic collection of mobile phones has become a necessary means for public security organs to handle cases. forensics

Method used

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  • Manufacturing method of simulation fingerprint
  • Manufacturing method of simulation fingerprint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The embodiment of the present invention provides a method for making a simulated fingerprint, referring to figure 1 As shown, the method includes the steps of:

[0034] 101. Using image processing technology to preprocess the fingerprint image provided by the public security system to obtain a preprocessed image containing fingerprint information satisfying preset conditions.

[0035] Wherein, the fingerprint information includes fingerprint size and fingerprint clarity;

[0036] When the size of the fingerprint is equal to the size of the real fingerprint, and the resolution of the fingerprint is greater than the preset resolution, the fingerprint information satisfies the preset condition.

[0037] Specifically, based on the original size of the fingerprint picture, the binarized image of the fingerprint picture is horizontally flipped and reversed.

[0038] Further, before using image processing technology to preprocess the fingerprint picture provided by the publi...

Embodiment 2

[0053] The embodiment of the present invention provides a method for making a simulated fingerprint, referring to figure 2 As shown, the method includes the steps of:

[0054] 201. Based on the original size of the fingerprint picture, perform horizontal flipping and color inversion processing on the binarized image of the fingerprint picture to obtain a preprocessed image including fingerprint information satisfying a preset condition.

[0055] Among them, the fingerprint picture is provided by the public security system, and the fingerprint picture can be generated by collecting fingerprints through the fingerprint collector. The fingerprint collector uses the biological radio frequency fingerprint identification system to emit a small amount of radio frequency signal through the sensor itself, penetrating the epidermis of the finger To control the texture of the inner layer to generate a fingerprint image. In addition, the fingerprint picture can also be obtained by scann...

Embodiment 3

[0080] The embodiment of the present invention provides a method for making a simulated fingerprint, referring to Figure 4 As shown, the method includes the steps of:

[0081] 401. Based on the original size of the fingerprint picture, perform horizontal flipping and color inversion processing on the binarized image of the fingerprint picture to obtain a preprocessed image including fingerprint information satisfying a preset condition.

[0082] Specifically, for the implementation process of this step, reference may be made to step 201, which will not be repeated here.

[0083] 402. Convert the preprocessed image into a file format recognizable by the 3D printer.

[0084] Specifically, the preprocessed image is used for 3D modeling with computer modeling software, and it is converted into a file format that can be read by a 3D printer. Usually, the file format is an STL file format.

[0085] 403. Using a 3D printer, print the fingerprint information contained in the prepr...

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Abstract

The invention discloses a manufacturing method of a simulation fingerprint, and belongs to the technical field of fingerprint recognition. The method comprises the steps that fingerprint pictures provided through a public security system are preprocessed through the image processing technology, and preprocessed images including fingerprint information meeting preset conditions are obtained; a carving method or a 3D printing method is adopted, and a fingerprint mold is manufactured and formed based on the fingerprint information included by the preprocessed images; and the simulation fingerprint is manufactured and formed through the fingerprint mold. By means of the manufacturing method, fingerprint data of the public security organ can be applied to manufacturing the simulation fingerprint, and then the public security organ can conveniently unlock mobile phone screens of corresponding parties through the simulation fingerprint so as to achieve the aim of mobile phone forensics.

Description

technical field [0001] The invention relates to the technical field of fingerprint identification, in particular to a method for making a simulated fingerprint. Background technique [0002] Fingerprint identification technology is currently the most mature and cheap biometric identification technology. There are more and more application scenarios of fingerprint recognition. Most smartphones integrate fingerprint recognition to unlock the screen. Fingerprint unlocking has become the first choice for most mobile phone users to unlock the screen. In addition, emerging electronic smart door locks have also added fingerprint Unlock recognition. [0003] Public security organs build fingerprint databases by collecting fingerprints. At present, the fingerprint databases of public security organs are mostly used for comparison and identification, or for research and analysis, or in the field of biological forensics. They are rarely used in the field of extraction of electronic ev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C33/38B29C41/02
CPCB29C33/3842B29C41/02
Inventor 不公告发明人
Owner 广州市公安局网络警察支队
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