Biometric region positioning method and device for non-contact image acquisition

A technology of biometrics and image collection, applied in character and pattern recognition, instruments, computer parts, etc., can solve the problems of large size, achieve good user experience and hygiene assurance, and improve user acceptance

Active Publication Date: 2017-08-08
BEIJING WHOIS TECH
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a biometric region positioning method for non-contact image collection, which can solve the problem that the existing biometric collection and recognition devices are relatively large in size, and must be in contact with the collector to complete collection and identification.

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  • Biometric region positioning method and device for non-contact image acquisition

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Embodiment Construction

[0022] In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0023] In the following preferred embodiments, for the convenience of description, the near-infrared image is described by taking the palm vein image and the visible light image by taking the palm print image as an example. It should be seen as a limitation of the present invention.

[0024] refer to figure 1 , which shows the process flow of an embodiment of the method for locating the biometric area of ​​the non-contact image acquisition according to the present invention. The positioning method specifically includes the following steps:

[0025] Step S101: Binarize the near-infrared image to obtain a binarized image after segmenting and removing the background of the image;

[0026] In the binarization process of the above...

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Abstract

The present invention provides a biometric region positioning method and device for non-contact image acquisition, the non-contact image acquisition includes a near-infrared image, and the method includes: binarizing the near-infrared image to obtain and remove The binarized image behind the image background; the binarized image is denoised to obtain the edge point information of the biometric region; according to the edge point information, the key point of the biometric region is obtained, and the near Biometric area of ​​an infrared image. The main body of the near-infrared image collected by the non-contact method of the present invention is a relatively bright biological feature image, and the background is displayed as a dark area in the image due to the weak near-infrared reflected light. Using a simple threshold segmentation algorithm, the image can be realized. Rapid segmentation and binarization can solve the problem that the existing technology can only use contact biometric feature collection in a closed environment in order to eliminate the interference of external light sources, resulting in a larger system equipment.

Description

technical field [0001] The present invention relates to the technical field of image acquisition and processing, in particular to a method and device for locating a biometric area for non-contact image acquisition. Background technique [0002] The identification technology based on human biometrics is abbreviated as biometric technology. The so-called biometric technology refers to the use of the inherent physical characteristics of the human body, such as fingerprints, palm prints, iris, face, etc., and behavioral characteristics, such as voice, handwritten signature, gait, etc., as a personalized representation of a person. A technique for identifying a person. Compared with traditional identity representations such as keys, passwords and ID cards, human biometrics have the advantages of being less likely to be forgotten, lost and forged. Therefore, biometrics technology and its derived products have developed rapidly and have a broad market. prospect. [0003] Among t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06K9/54
Inventor 李彬曲寒冰王加强
Owner BEIJING WHOIS TECH
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