Method and device for calculating quality score of finger vein image
A quality score and calculation method technology, applied in calculation, computer parts, blood vessel patterns, etc., can solve the problems of low accuracy, low accuracy and efficiency of identity authentication, and achieve the effect of high accuracy and high authentication efficiency
Active Publication Date: 2020-01-24
GRG BAKING EQUIP CO LTD
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[0004] However, the inventors found that at present, the accuracy of quality judgment of finger vein images is low, and the accuracy and efficiency of identity authentication are low. Therefore, how to provide a method and device for calculating the quality score of finger vein images has become a major problem to be solved urgently
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[0045] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0046] This application provides a method for calculating the quality score of a finger vein image, by obtaining the normalized image and the binarized image of the finger vein image to be quality judged, and obtaining the boundary point and the value of each finger vein in the binarized image The middle point, then obtain the gray value of the boundary point and the middle point in the normalized image, and calculate the average gray level difference between the middle point and the...
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This application provides a method for calculating the quality score of a finger vein image, by obtaining the normalized image and the binarized image of the finger vein image to be quality judged, and obtaining the boundary point and the value of each finger vein in the binarized image The middle point, then obtain the gray value of the boundary point and the middle point in the normalized image, and calculate the average gray level difference between the middle point and the boundary point, and, according to the average gray level difference, create the average of the middle point and the boundary point Grayscale difference array, then calculate the number of points in the average grayscale difference array that is greater than the preset threshold, and finally add the points with different preset thresholds to obtain the cumulative sum of points at different thresholds, and normalize the cumulative sum of points Process to obtain the quality score of the finger vein image. It can be seen that this scheme obtains high-quality finger vein images with high accuracy, and then performs identity authentication with high authentication efficiency.
Description
technical field [0001] The present application relates to the technical field of biometric identification, and more specifically, to a method and device for calculating a quality score of a finger vein image. Background technique [0002] With the continuous development of science and technology, the traditional methods of user identification and verification through user names, passwords, etc. are not enough to meet the growing needs of online payment. Biometric identification has been developed rapidly by virtue of its uniqueness. Specifically, biometric identification technology uses human biometric or behavioral characteristics for personal identity authentication, where biometrics may include fingerprints, palm shapes, irises, face shapes, etc., and behavioral characteristics may include actions, voices, signatures, etc. [0003] Vein recognition technology is a kind of biometric technology. It achieves the purpose of identification and authentication through live reco...
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IPC IPC(8): G06K9/00G06K9/32G06K9/38G06K9/42
CPCG06V40/10G06V40/14G06V10/28G06V10/32G06V10/25G06V10/24
Inventor 梁添才陈侃金晓峰龚文川
Owner GRG BAKING EQUIP CO LTD