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Fingerprint identification device and fingerprint identification method

A fingerprint recognition and object technology, applied in character and pattern recognition, details involving image splicing, image data processing, etc., can solve the problems of fingerprint misjudgment, fingerprint recognition correctness and security decline, etc., to solve the problem of recognition error Effect

Pending Publication Date: 2020-08-25
EGIS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If there is residual fingerprint grease, using non-finger objects to press on the fingerprint sensor will cause the residual fingerprint to be misjudged, resulting in a decline in the accuracy and security of fingerprint recognition

Method used

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  • Fingerprint identification device and fingerprint identification method
  • Fingerprint identification device and fingerprint identification method
  • Fingerprint identification device and fingerprint identification method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0031] figure 2 It is a schematic diagram of emitting a structured light pattern from a position of a display corresponding to a sensor according to an embodiment of the present invention.

[0032] Please also refer to Figure 1A , Figure 1B and figure 2 , when the object to be measured touches the area 220 of the display 110 corresponding to the sensor 120 , the light source 115 can emit structured light to scan the object to be measured. The structured light can have phase patterns 230(1), 230(2), 230(3), . . . , 230(N) with different phase shifts, and the light source 115 sequentially emits the The structured light is used to scan the object to be measured, so that the sensor 120 obtains N images corresponding to the phase patterns 230(1)-230(N) of the object to be measured. The phase patterns 230(1)-230(N) can be established by sinusoidal fringe patterns, and each of the phase patterns 230(1)-230(N) can include information of different phase shifts. Taking N=3 as an...

no. 2 example

[0041] image 3 It is a schematic diagram of emitting a structured light pattern from a position of a display corresponding to a sensor according to another embodiment of the present invention.

[0042] Please also refer to Figure 1A , Figure 1B and image 3When the object to be measured touches the area 320 of the display 110 corresponding to the sensor 120 , the light source 115 may emit structured light with a color pattern to scan the object to be measured so that the sensor 120 obtains a color image of the object to be measured. The color pattern of the structured light can be a three-channel color image composed of the red phase pattern 331 , the green phase pattern 332 and the blue phase pattern 333 . For example, the red phase pattern 331 , the green phase pattern 332 and the blue phase pattern 333 may have a phase shift of 120 degrees between each other.

[0043] Next, the processing module 130 can obtain the color image of the object under test from the sensor 1...

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PUM

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Abstract

The invention provides a fingerprint identification device and a fingerprint identification method. The fingerprint recognition device includes: a display; a light source which is arranged below the display; a sensor which is arranged below the display; and a processing module coupled to the sensor. When an object contacts the display, the light source emits structured light to scan the object. The sensor obtains one or more images of the object, wherein the one or more images include information of different phase displacements. And the processing module is used for calculating three-dimensional information of the object according to the one or more images and judging whether the object is a real finger or not according to the three-dimensional information.

Description

technical field [0001] The invention relates to a fingerprint identification device and a fingerprint identification method, in particular to a fingerprint identification device and a fingerprint identification method capable of identifying whether a finger image is a real finger. Background technique [0002] With the advancement of technology, fingerprint recognition has become one of the main authentication methods. If there is fingerprint grease residue, pressing an object other than a finger on the fingerprint sensor will cause the residual fingerprint to be misjudged, resulting in a decline in the accuracy and security of fingerprint recognition. Therefore, how to more accurately identify whether there is a real finger on the fingerprint sensor is a goal that those skilled in the art should devote themselves to. Contents of the invention [0003] In view of this, the present invention provides a fingerprint identification device and a fingerprint identification meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCH04N1/00129H04N1/04G06T3/4038G06T2200/32G06V40/1318G06V10/26G06V40/1347G06V40/1335G06V40/1365G06V40/40
Inventor 杨宸林冠仪林家玮林煜桦
Owner EGIS TECH
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