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Method and device for discriminating finger vein pressing images and method for recognizing finger vein

A discrimination method and finger vein technology, applied in the field of finger vein identification, can solve problems such as affecting the system identification performance

Active Publication Date: 2018-07-13
智慧眼科技股份有限公司
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Problems solved by technology

[0005] The present invention provides a method and device for distinguishing finger vein pressing pictures, and a finger vein recognition method to solve the technical problem that the recognition performance of the system is affected by additional fingerprint interference information added to the pressing operation of vein collection

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  • Method and device for discriminating finger vein pressing images and method for recognizing finger vein
  • Method and device for discriminating finger vein pressing images and method for recognizing finger vein

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Embodiment Construction

[0052] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0053] refer to figure 1 , a preferred embodiment of the present invention provides a method for discriminating finger vein pressing diagrams, including:

[0054] Step S100, image preprocessing, filtering the collected finger image to suppress noise, wherein the collected finger image is a horizontal collection image or a vertical collection image;

[0055] Step S200, locating the finger boundary, fitting the boundary line of the effective finger area on the preprocessed image;

[0056] Step S300, obtaining the effective area, searching for the largest inscribed rectangle in the effective finger area located by the fitted boundary line and cutting out the pixels of the rectangular area to obt...

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Abstract

The invention discloses a method and device for discriminating finger vein pressing images, and a method for recognizing a finger vein. The method comprises the following steps: a step of image preprocessing; a step of finger boundary positioning; a step of effective region acquisition; a step of effective region enhancement; a step of SOBEL edge enhancement; a step of convoluting SOBEL operatorsand vein distribution images to obtain an SOBEL enhanced image containing a fingerprint information region; a step of calculating an image determination coefficient, wherein horizontal gradient energyand vertical gradient energy are calculated on the SOBEL enhanced image, and a specific value of the vertical gradient energy divided by the horizontal gradient energy or a specific value of the horizontal gradient energy divided by the vertical gradient energy is used as the determination coefficient; a step of fingerprint vein image determination. Via the method and device for discriminating the finger vein pressing images, and the method for recognizing the finger vein disclosed in the invention, content of the fingerprint information in the collected finger images is quantified and is compared with a threshold value, and unreasonable images are blocked at a current processing stage through a preset shielding mechanism; rationality, authenticity and effectiveness of processed data in asystem can be maintained; effective guarantees can be provided for system comparison results.

Description

technical field [0001] The present invention relates to the field of finger vein recognition, in particular to a method and device for distinguishing finger vein pressing maps, and a finger vein recognition method. Background technique [0002] Finger vein recognition is a new biometric technology developed in recent years. The principle of this technology is based on the fact that the hemoglobin in human veins absorbs near-infrared rays, so the images of veins can be obtained through sensors; furthermore, modern medicine has confirmed that the images of veins in each person's fingers are different. This uniqueness generates biometrics that identify an individual. [0003] Compared with identification technologies such as fingerprint recognition, iris and voiceprint recognition, finger vein recognition is gaining more and more attention in the field of biometrics because of its security brought about by its natural living characteristics. [0004] The source object of fing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/03G06K9/32G06K9/46G06K9/00
CPCG06V40/10G06V40/14G06V10/993G06V10/255G06V10/44
Inventor 刘永松
Owner 智慧眼科技股份有限公司
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