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Quality evaluation method and apparatus of fingerprint images

A fingerprint image and quality assessment technology, applied in the field of image processing, can solve the problem of low accuracy, achieve the effect of improving stability, improving accuracy and recognition speed

Active Publication Date: 2016-06-29
SHENZHEN CHIPSAILING TECH CO LTD
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Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a method and device for evaluating the quality of fingerprint images, aiming to solve the problem of low accuracy in evaluating the quality of fingerprint images in the prior art

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  • Quality evaluation method and apparatus of fingerprint images
  • Quality evaluation method and apparatus of fingerprint images
  • Quality evaluation method and apparatus of fingerprint images

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Embodiment Construction

[0021] In order to illustrate the technical solutions of the present invention, the following specific embodiments are used for description. In the following description, for the purpose of illustration rather than limitation, specific details such as specific system structures and technologies are set forth in order to provide a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0022] figure 1 The implementation process of the fingerprint image quality assessment method provided by the embodiment of the present invention is shown, and the details are as follows:

[0023] In S101, the feature values ​​of the fing...

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Abstract

The invention is applied to the technical field of image processing and provides a quality evaluation method and apparatus of fingerprint images. The method comprises the following steps: calculating feature values of fingerprint image samples; training a nerve network by taking the feature values of the fingerprint image samples as input and quality values of the fingerprint image samples as output until preset function values about all the fingerprint image samples are minimum, and obtaining a well trained nerve network; obtaining test fingerprint images, and obtaining feature values of the test fingerprint images through calculation; and inputting the feature values of the test fingerprint images into the well trained nerve network, and obtaining quality values of the test fingerprint images. According to the invention, quality evaluation of small-dimension fingerprint images can be realized, and since the nerve network is employed in the quality evaluation process of the fingerprint images, the efficiency of quality evaluation and the stability of a quality evaluation result are improved and the accuracy of fingerprint identification and the identification speed are improved.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a method and device for evaluating the quality of fingerprint images. Background technique [0002] Fingerprint recognition technology has been widely used in access control, attendance, payment, mobile terminals and other technical fields. Since the fingerprint images collected by the fingerprint sensor are mostly small-sized images, the quality of the fingerprint image greatly affects the accuracy of fingerprint recognition. Therefore, before performing fingerprint identification, the process of judging the quality of the fingerprint image is particularly important. [0003] In the prior art, the similarity of weights is determined by the information entropy or information spectrum of the fingerprint image, so as to evaluate the quality of the fingerprint image. Enhancement cannot completely eliminate noise, and it is easy to generate a large number of fal...

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Application Information

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IPC IPC(8): G06K9/00G06T7/00
CPCG06T7/0002G06T2207/20021G06T2207/30168G06V40/1347G06V40/1365
Inventor 于泽
Owner SHENZHEN CHIPSAILING TECH CO LTD
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