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Fingerprint detection device

A fingerprint collection and fingerprint image technology, which is applied in the direction of acquiring/organizing fingerprints/palmprints, printing image collection, instruments, etc., can solve the problem of low accuracy of fingerprint detection and achieve the effect of ensuring accuracy

Pending Publication Date: 2018-06-05
SHENZHEN SHENGQIANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on this, the purpose of the embodiments of the present invention is to provide a fingerprint detection device, which aims to solve the problem of low accuracy of fingerprint detection in the prior art

Method used

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Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0024] see figure 1 , a fingerprint detection device 100 includes: a speckle imaging module 10 , a fingerprint collection module 20 , a transmission module 30 and a signal processing module 40 .

[0025] Further, the fingerprint detection device 100 also includes a light source module 50, such as figure 2 shown. Preferably, the light source module 50 is a single-frequency laser.

[0026] Wh...

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Abstract

The invention discloses a fingerprint detection device. The device comprises a speckle imaging module, a fingerprint acquisition module, a transmission module and a signal processing module, wherein the fingerprint acquisition module is controlled by the signal processing module and performs fingerprint acquisition on a finger contacted with the transmission module so as to form a fingerprint image; the speckle imaging module is controlled by the signal processing module and performs speckle imaging on speckle light formed by the finger so as to form a speckle image; the signal processing module performs repeated acquisition of the fingerprint image and the speckle image; and if the repeatedly acquired fingerprint image is the same and a speckle contrast ratio calculated by the speckle image does not deviate from a specified range, the formed identical fingerprint image is determined as a living fingerprint. According to the fingerprint detection device disclosed by the invention, theliving fingerprint detection accuracy rate can be improved.

Description

technical field [0001] The invention belongs to the technical field of fingerprint detection, in particular to a fingerprint detection device. Background technique [0002] At present, fingerprint detection technology has been widely used in security access control, attendance assessment, identification, security encryption and other fields. Everyone's fingerprints are identical in patterns, power-offs and intersections, and are unique. Thus, by comparing the subject's fingerprint with the previously stored fingerprint data, the fingerprint detection result can be obtained. [0003] However, if the subject's fingerprint is copied to some imitation material (such as silica gel material), the fingerprint identification device will obtain a false fingerprint detection result because the copied fingerprint is identical to the subject's fingerprint. [0004] Therefore, the existing fingerprint detection device still has the limitation that the accuracy of fingerprint detection ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06V40/1324G06V40/1318
Inventor 黄强吉雁鸿王子晗靳杰邝国涛
Owner SHENZHEN SHENGQIANG TECH