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Image enhancement processing method and palm vein recognition method for palm vein images

A technology of image enhancement and processing method, which is applied in the field of biometric information recognition, and can solve the problems of insufficient clarity and accuracy of palm vein images, redundancy, and affecting the matching recognition effect of palm vein features.

Active Publication Date: 2021-08-10
佛山育脉科技有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] However, the collected palm vein images may not be clear and accurate, and there may be a large amount of redundant information in the images. The current filtering, image binarization and thinning methods used in image preprocessing cannot solve the above problems well. This increases the difficulty of the subsequent operation of extracting palm vein features from palm vein images, and may also lead to inaccurate palm vein features finally extracted, which in turn affects the matching recognition effect of palm vein features

Method used

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  • Image enhancement processing method and palm vein recognition method for palm vein images
  • Image enhancement processing method and palm vein recognition method for palm vein images
  • Image enhancement processing method and palm vein recognition method for palm vein images

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Embodiment 1

[0055] The invention provides an image enhancement processing method for palm vein images aiming at the deficiencies of the prior art.

[0056] The method includes as figure 1 steps shown. The execution subject of the image enhancement processing method for palm vein images provided in this embodiment may be a system composed of multiple devices (such as a palm vein recognition system), which can at least realize the image preprocessing operation in the process of palm vein recognition , can also realize the entire palm vein recognition process, that is, it can complete the collection of palm vein images, preprocess the collected palm vein images, extract palm vein features from the preprocessed palm vein images, and convert the extracted palm vein images The features are matched with the corresponding palm vein features (ie registered palm vein features) extracted and saved in advance. In one implementation, the system can at least include an acquisition terminal (such as a...

Embodiment 2

[0085] At present, the processing efficiency of the palm vein image by the palm vein recognition system is low, and the processing time for processing a palm vein image to extract the palm vein features is generally as high as 1 second. In palm vein recognition, usually only a single palm vein image of an individual is collected for processing, and the palm vein feature matching process is performed based on the palm vein features extracted from the single palm vein image. However, based on a single palm vein image The palm vein feature extracted from the palm vein feature is used for palm vein feature matching, the matching result is accidental, the recognition effect is unstable, the robustness is not high, and the problem of misidentification is prone to occur.

[0086] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides Embodiment 2. Specifically, in the above-mentioned first embodiment, the limited contrast adaptive histogram equali...

Embodiment 3

[0102] Based on the image enhancement processing methods for palm vein images provided in the above embodiments, the present invention also provides a palm vein recognition method. In one embodiment, the palm vein recognition method includes the following steps.

[0103] Acquire multiple palm vein images of an authenticated subject.

[0104] Each palm vein image is processed using the image enhancement processing method for the palm vein image provided in the first embodiment to obtain a plurality of enhanced images of the region of interest. Extract the palm vein features from the regional image, compare the extracted multiple palm vein features with the registered palm vein features of the authentication subject pre-stored in the database, and determine the Authenticating the palm vein recognition result of the subject this time; or, using the image enhancement processing method for palm vein images provided in the aforementioned embodiment 2 to process each palm vein image...

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Abstract

The present application relates to the field of biological information identification, in particular to an image enhancement processing method and device for palm vein images, and a palm vein recognition method and device. The method includes: processing the collected palm vein image into a binary black-and-white image; determining the first finger-joint point and the second finger-joint point in the palm according to the binarized black-and-white image; The second finger seam point is extended to obtain the third finger seam point and the fourth finger seam point, and the location information of the region of interest is obtained according to the third finger seam point and the fourth finger seam point; the palm vein image is obtained according to the location information of the region of interest Obtain the image of the region of interest; perform enhancement processing on the image of the region of interest, and obtain the image of the region of interest after the enhancement process. The embodiment of the present invention can enhance the palm vein image to highlight the palm vein information, so that it is easier to extract accurate palm vein features from the palm vein image later.

Description

technical field [0001] The present application relates to the field of biological information identification, in particular to an image enhancement processing method and device for palm vein images, and a palm vein recognition method and device. Background technique [0002] Palm vein recognition is a relatively new biometric recognition technology proposed in recent years. The palm vein, that is, the vein in the palm, cannot be replicated due to the pattern of veins, so palm vein recognition is more secure than the currently commonly used fingerprint recognition. [0003] Palm vein recognition system usually includes four parts: palm vein image acquisition, image preprocessing, palm vein feature extraction and palm vein feature matching. The palm vein recognition process can be, for example, real-time collection of the palm vein image of the authentication subject (the individual performing identity authentication) (including the fingers, wrist and background area of ​​the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06K9/32G06K9/38G06K9/40
CPCG06V40/10G06V40/14G06V10/25G06V10/28G06V10/30
Inventor 程自昂曾林森
Owner 佛山育脉科技有限公司
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