首页>
外国专利>
HIGH-SPEED RETRIEVAL ALGORITHM FOR FINGER VEIN WITH SUPER LARGE NUMBER OF USERS, AND RECOGNITION DEVICE
HIGH-SPEED RETRIEVAL ALGORITHM FOR FINGER VEIN WITH SUPER LARGE NUMBER OF USERS, AND RECOGNITION DEVICE
展开▼
机译：具有超大量用户的手指静脉的高速检索算法，以及识别装置
展开▼
页面导航
摘要
著录项
相似文献
摘要
The present invention relates to a high-speed retrieval algorithm for a finger vein with a super large number of users, and a recognition device. The high-speed retrieval algorithm comprises the following steps: collecting finger vein images of a user to be recognized and of all registered users, and respectively carrying out image size normalization, image enhancement processing and feature point detection; according to a first-order derivative and a second-order derivative of each image, calculating the average curvature of all pixel points of each image; according to the average curvature of all the pixel points of each image, binarizing the finger vein images of the user to be recognized and of all the registered users by means of image segmentation; carrying out translation and rotation calibration of the images on the basis of center coordinates and rotation angles of feature points; and by means of an exclusive-OR operation, respectively calculating a Hamming distance between a binary image of the user to be recognized and a binary image of each registered user, wherein the registered user with the minimum Hamming distance is the registered user who is most similar to an image to be subjected to recognition. By means of the present invention, the amount of retrieved data is reduced, and there is no need to traverse a plurality of possible positions and rotation difference values, such that the retrieval speed is greatly increased.
展开▼
