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Discrimination method and device of finger vein pressing map, finger vein recognition method

A discrimination method, finger vein technology, applied in the field of finger vein recognition, can solve problems affecting system recognition performance, etc.

Active Publication Date: 2020-04-21
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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  • Discrimination method and device of finger vein pressing map, finger vein recognition method
  • Discrimination method and device of finger vein pressing map, finger vein recognition method
  • Discrimination method and device of finger vein pressing map, finger vein recognition method

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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 distinguishing finger vein pressing images, and a finger vein recognition method. The method includes: image preprocessing; finger boundary positioning; effective area acquisition; effective area enhancement; SOBEL edge enhancement, using SOBEL operator and The vein distribution image is convolved to obtain the SOBEL enhanced image containing the fingerprint information area; the image determination coefficient is calculated, the horizontal gradient energy and the vertical gradient energy are calculated on the SOBEL enhanced image, and the ratio of the vertical gradient energy divided by the horizontal gradient energy or the horizontal gradient energy is used. The ratio of the gradient energy divided by the vertical gradient energy is used as the determination coefficient; including the determination of the fingerprint vein map. The present invention quantifies the fingerprint information content in the collected finger image and compares it with the threshold value, and blocks the unreasonable image in the current processing stage through the preset shielding mechanism, so as to maintain the rationality and authenticity of the processed data in the system and validity, providing an effective guarantee for the 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 Patents(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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