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Acquisition and splicing method of three-face rolling fingerprint

A technology of fingerprints and fingerprint images, which is applied in the field of collection and splicing of three-sided rolling fingerprints, which can solve the problems of poor quality, difficulty, and easy damage of fingerprints, and achieve the effect of complete, accurate collection and easy comparison of fingerprints

Inactive Publication Date: 2008-08-13
北京海鑫科金信息技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing method of collecting three-sided rolling fingerprints is to use ink printing to collect them, and then make them into fingerprint cards and store them. However, the fingerprints collected by this method are of poor quality and are easily damaged. It is also difficult to compare

Method used

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  • Acquisition and splicing method of three-face rolling fingerprint
  • Acquisition and splicing method of three-face rolling fingerprint
  • Acquisition and splicing method of three-face rolling fingerprint

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Embodiment Construction

[0036] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0037] figure 1 It is the flow chart of the collection and splicing method of the three-sided rolling fingerprint of the present invention, as figure 1 As shown, the collection and splicing method of three-sided rolling fingerprint of the present invention comprise:

[0038] 1) collect the background image, collect a frame of background image before the finger starts printing (S11);

[0039] 2) Collecting serial fingerprints, the finger scrolls on the collection window, and a serial fingerprint image is collected during the scrolling process (S12);

[0040] 3) removing the background from the fingerprint image, and subtracting the collected sequence fingerprint from the background image (S13);

[0041] 4) mapping the histogram of the image obtained in step 3) into a histogram of uniform distribution of all gray levels in an image (S14);

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Abstract

The three-sided rolling fingerprint acquiring and splicing process includes acquiring background image, acquiring serial fingerprint, eliminating background from the fingerprint image, mapping the image histogram to form histogram with homogeneously distributed grey scale, Gaussian smoothing treatment, calculating threshold and binarizing the image with the threshold, judging whether to have fingerprint in the image and acquiring the next image if no or progressing the next step if yes, calculating the center and four boundaries of the fingerprint, acquiring the next sequential image and repeating the forgoing steps, obtaining the maximum correlating block between the two sequential fingerprint image and its center line as the optimal splicing line, eliminating dislocation in the splicing line to splice two fingerprint images, repeating the foregoing steps until no fingerprint input.

Description

technical field [0001] The invention relates to a method for collecting and splicing fingerprints, in particular to a method for collecting and splicing three-sided rolling fingerprints. Background technique [0002] Due to the stability and uniqueness of the fingerprint itself, the fingerprint plays a huge role in identification. Fingerprint collection can be divided into flat fingerprint collection and three-sided rolling fingerprint collection. [0003] Planar fingerprints are usually used in civilian applications. It is mostly used in the case of 1:1 comparison, that is, for verification. When verifying, the system compares the fingerprints collected by the current printing with the fingerprints stored in the database during the original registration. The quality of the fingerprints stored in the database at the time of registration is relatively good and the comparison is 1:1, so when used In the verification technology, relatively few fingerprint feature points are r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/20G06T5/40
Inventor 陆乃将夏志敏刘晓春虞秀华
Owner 北京海鑫科金信息技术有限公司
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