Image-based fingerprint quality evaluation method and device and electronic equipment

A quality assessment and fingerprint technology, applied in the field of image processing, can solve the problems of increasing the complexity of the calculation and the cumbersome process of fingerprint quality assessment, and achieve the effect of reducing the complexity, quickly evaluating and simplifying the process.

Active Publication Date: 2020-05-19
FOCALTECH ELECTRONICS SHENZHEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, relying on the image contrast or binarizing the image to detect the spine region of the image to realize the fingerprint quality assessment method of the image increases the computational complexity. The fingerprint quality assessment of the image depends on the number of image samples and requires a large amount of data collection and Training acquisition makes the fingerprint quality assessment process too cumbersome

Method used

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  • Image-based fingerprint quality evaluation method and device and electronic equipment
  • Image-based fingerprint quality evaluation method and device and electronic equipment
  • Image-based fingerprint quality evaluation method and device and electronic equipment

Examples

Experimental program
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Embodiment 1

[0045] figure 1 It is a flowchart of an image-based fingerprint quality assessment method in an embodiment of the present invention. According to different requirements, the order of the steps in the flowchart can be changed, and some steps can be omitted.

[0046] refer to figure 1 As shown, the image-based fingerprint quality assessment method specifically includes the following steps:

[0047] Step S11, collecting fingerprint images.

[0048] In this embodiment, a fingerprint image is collected by a fingerprint sensor. The fingerprint sensor is at least one of an optical fingerprint sensor, a semiconductor capacitive fingerprint sensor, a semiconductor thermal fingerprint sensor, a semiconductor pressure sensitive fingerprint sensor, an ultrasonic fingerprint sensor and a radio frequency fingerprint sensor.

[0049] Step S12, removing the DC component in the fingerprint image.

[0050] In this embodiment, the removing the DC component in the fingerprint image includes:...

Embodiment 2

[0064] figure 2 It is a structural diagram of an image-based fingerprint quality assessment device 30 in an embodiment of the present invention.

[0065] In some embodiments, the image-based fingerprint quality assessment device 30 runs in an electronic device. The image-based fingerprint quality assessment device 30 may include a plurality of functional modules composed of program code segments. The program codes of each program segment in the image-based fingerprint quality assessment device 30 can be stored in a memory, and executed by at least one processor to perform the fingerprint quality assessment function.

[0066] In this embodiment, the image-based fingerprint quality assessment device 30 can be divided into multiple functional modules according to the functions it performs. refer to figure 2 As shown, the image-based fingerprint quality assessment device 30 may include an acquisition module 301 , a DC removal module 302 , a frequency domain transformation mod...

Embodiment 3

[0084] image 3 It is a schematic diagram of the electronic device 6 in an embodiment of the present invention.

[0085] The electronic device 6 includes a memory 61 , a processor 62 and a computer program 63 stored in the memory 61 and executable on the processor 62 . When the processor 62 executes the computer program 63, it realizes the steps in the embodiment of the above image-based fingerprint quality assessment method, for example figure 1 Steps S11 to S15 are shown. Alternatively, when the processor 62 executes the computer program 63, it realizes the functions of each module / unit in the embodiment of the image-based fingerprint quality assessment device, for example figure 2 Modules 301-305 in .

[0086] Exemplarily, the computer program 63 can be divided into one or more modules / units, and the one or more modules / units are stored in the memory 61 and executed by the processor 62 to complete this invention. The one or more modules / units may be a series of comput...

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Abstract

The invention relates to an image-based fingerprint quality evaluation method and device, and electronic equipment. The method comprises the following steps: acquiring a fingerprint image; removing adirect current component in the fingerprint image; carrying out frequency domain transformation on the fingerprint image without the direct current component to obtain a spectrogram of the fingerprintimage, and calculating a spectral energy diagram of the fingerprint image according to the spectrogram of the fingerprint image; extracting fingerprint frequency region features in the spectrum energy diagram; and scoring the fingerprint image according to the fingerprint frequency region features to obtain an evaluation result of the fingerprint image. According to the scheme, the quality of thefingerprint image can be rapidly evaluated, the calculation complexity of fingerprint quality evaluation is reduced, and the fingerprint quality evaluation process is simplified.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to an image-based fingerprint quality evaluation method, device and electronic equipment. Background technique [0002] In the prior art, image fingerprint quality evaluation is realized mainly by relying on image contrast, or by binarizing the image to detect the spine region of the image, or by relying on the number of image samples. However, relying on the image contrast or binarizing the image to detect the spine region of the image to realize the fingerprint quality assessment method of the image increases the complexity of the calculation, and relying on the number of image samples to realize the fingerprint quality assessment of the image requires a large amount of data collection and Training acquisition makes the fingerprint quality assessment process too cumbersome. Contents of the invention [0003] In view of the above, it is necessary to propose an image-bas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06K9/00
CPCG06T7/0002G06T2207/10004G06T2207/30168G06V40/1359G06V40/1365Y02P90/30
Inventor 翟剑锋李准龙文勇
Owner FOCALTECH ELECTRONICS SHENZHEN CO LTD
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