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An optical fingerprint system based on fingerprint residue screening and its detection method

A detection method and fingerprint technology, applied in the direction of acquiring/arranging fingerprints/palmprints, character and pattern recognition, printing image collection, etc., can solve the problem that the fingerprint recognition system does not have universality, etc., to reduce the probability of residual fingerprints, run The effect of fast speed and small amount of algorithm

Active Publication Date: 2018-11-09
JIANGSU BRMICO ELECTRONICS
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the threshold selection of this method relies on empirical values, which is not universal for different fingerprint recognition systems.

Method used

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  • An optical fingerprint system based on fingerprint residue screening and its detection method
  • An optical fingerprint system based on fingerprint residue screening and its detection method
  • An optical fingerprint system based on fingerprint residue screening and its detection method

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Embodiment Construction

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0028] see Figure 1 to Figure 4 , the embodiment of the present invention includes:

[0029] An optical fingerprint system based on fingerprint residue screening, characterized in that it includes: an optical imaging module and a control module,

[0030] Such as figure 1 As shown, the optical imaging module includes a prism 1 and a lens 2, the surface of the lens 2 is coated with a layer of physical coating 21, the lens 2 is also equipped with a filter, the finger is pressed in front of the prism 1,

[0031] Suc...

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Abstract

The invention discloses an optical fingerprint system based on fingerprint residue screening and a detection method thereof, comprising: an optical imaging module and a control module, the optical imaging module includes a prism and a lens, the surface of the lens is coated with a layer of physical coating, An optical filter is also installed on the lens, and the control module includes an image sensor unit, a processor unit, a touch sensing unit and a voltage stabilizing circuit unit that are electrically connected to each other. Through the above method, the present invention is based on fingerprint residue screening. The optical fingerprint system and its detection method do not require dynamic adjustment of parameters, have small amount of algorithm, fast running speed and wide application range.

Description

technical field [0001] The invention relates to the field of fingerprint applications, in particular to an optical fingerprint system based on fingerprint residue screening and a detection method thereof. Background technique [0002] Compared with capacitive, pressure, temperature sensitive and other contact fingerprint sensors, optical fingerprint sensors have the advantages of long service life, beautiful appearance and high cost performance, and are widely used in fingerprint locks, fingerprint access control and other fields. However, after the fingerprint image is collected, secretions such as sweat and grease on the finger will leave some fingerprint traces on the surface of the sensor, and the optical fingerprint sensor is particularly sensitive to fingerprint residue. And the residual fingerprint will form a fingerprint image similar to a real finger under certain lighting conditions, which will interfere with the normal operation of the optical fingerprint recognit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00
CPCG06V40/1318
Inventor 周斌卢孟张飞飞
Owner JIANGSU BRMICO ELECTRONICS
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