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Iris positioning method and device

An iris positioning and iris technology, applied in the field of image processing, can solve problems such as inability to locate the iris, and achieve the effect of solving slow and accurate iris positioning results

Active Publication Date: 2016-04-13
湖北润宏科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide an iris positioning method and device, the purpose is to solve the problem that the iris cannot be positioned quickly and accurately in the prior art

Method used

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  • Iris positioning method and device
  • Iris positioning method and device

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Embodiment Construction

[0064] The iris recognition system segments the effective iris area from the iris image obtained by the imaging device, and matches it with the iris image in the database to complete the verification of the user's identity. The core of the invention is to provide an iris positioning method and device.

[0065] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0066] A flow chart of a specific embodiment of the iris location method provided by the present invention ...

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Abstract

The invention discloses an iris positioning method and device. The method comprises the following steps: obtaining an iris image; carrying out spot detection on the iris image to obtain a light spot of the iris image; preprocessing the iris image according to the detected light spot; obtaining an inner boundary point of the iris according to the gradient consistency feature from a pupil to the iris; obtaining an outer boundary point of the iris based on gray gradient and the gradient consistency feature; and fitting the inner boundary and the outer boundary of the iris through the inner boundary point and the outer boundary point to position the iris. The iris positioning method and device disclosed by the invention can be used for accurately and quickly positioning the inner and outer edges of the iris, effectively solving the problems of slow positioning of the iris and unsatisfactory iris image positioning precision, and providing an accurate iris positioning effect for subsequent feature matching.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to an iris positioning method and device. Background technique [0002] Biometric identification technology is widely used because of its high accuracy, no forgetting or loss, not easy to forge or be stolen, portable, and easy to use. In biometric identification technology, fingerprints are easy to forge and steal, and human faces are vulnerable to injuries and self-growth changes. A large number of scientific studies have shown that the iris, as an important biological feature, has the advantages of uniqueness, stability, collectability, and non-invasiveness. These advantages make iris recognition especially suitable for places that require identity authentication. [0003] The process of iris recognition system is: image acquisition, image preprocessing, feature extraction and encoding, matching authentication. Among them, iris location is an important link in the iris...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06V40/193G06V40/18
Inventor 汪子云周凯
Owner 湖北润宏科技股份有限公司
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