Method of filtering fingerprint image

a fingerprint image and filtering technology, applied in image enhancement, image analysis, instruments, etc., can solve the problem of acquired image being far from ideal fingerprints

Active Publication Date: 2022-01-27
HIMAX TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The method effectively denoises and enhances fingerprint images, improving feature extraction and identification accuracy by removing noise and enhancing image quality.

Problems solved by technology

Often, the imaging limitations, acquisition condition, age, maintenance of the original impression, as well as skin characteristics cause the acquired image to be far from ideal fingerprints.

Method used

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  • Method of filtering fingerprint image

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Embodiment Construction

[0022]Specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, however, the embodiments described are not intended to limit the present invention and it is not intended for the description of operation to limit the order of implementation. Moreover, any device with equivalent functions that is produced from a structure formed by a recombination of elements shall fall within the scope of the present invention. Additionally, the drawings are only illustrative and are not drawn to actual size. The using of “first”, “second”, “third”, etc. in the specification should be understood for identify units or data described by the same terminology, but are not referred to particular order or sequence.

[0023]FIG. 1 illustrates a flow chart of a method 1000 for filtering a fingerprint image according to some embodiments of the present invention. The method 1000 includes steps 1100-1700. In step 1100, an input image is receive...

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Abstract

A method of filtering a fingerprint image is provided. The method includes: receiving an input fingerprint image; preliminarily filtering the input fingerprint image to obtain a preprocessed image; normalizing and then filtering the preprocessed image to obtain a denoised image; filtering and then segmenting the preprocessed image to obtain a background mask; postprocessing the background mask to obtain a final mask; and applying the final mask to the denoised image to obtain an output fingerprint image.

Description

BACKGROUNDField of Invention[0001]The present invention relates to fingerprint image processing. More particularly, the present invention relates to a method of filtering a fingerprint image.Description of Related Art[0002]Fingerprint sensing and matching is a reliable and widely used technique for personal identification or verification. In particular, a common approach to fingerprint identification involves scanning a sample fingerprint or an image thereof and storing the image and / or unique characteristics of the fingerprint image. The characteristics of a sample fingerprint may be compared to information for reference fingerprints already in a database to determine proper identification of a person, such as for verification purposes.[0003]An ideal sensed or scanned fingerprint image is characterized by smoothly flowing patterns of distinct ridges and valleys. Often, the imaging limitations, acquisition condition, age, maintenance of the original impression, as well as skin chara...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): G06K9/00G06K9/40G06K9/54G06T5/00G06T5/30G06T7/194G06K9/46G06T3/40
CPCG06K9/00067G06K9/40G06K9/54G06T5/002G06T2207/20032G06T5/30G06T7/194G06K9/4604G06T3/4023G06T5/009G06V10/30G06V40/1347G06V10/28G06V10/443G06V10/20G06V10/44G06T5/70G06T5/92
InventorHUANG, TSUNG-YAU
OwnerHIMAX TECH LTD