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Iris positioning method based on morphology and probability statistic

A technique of mathematical morphology, probability and statistics, applied in computing, computer parts, character and pattern recognition, etc., can solve problems such as slow speed and large amount of integral calculation

Inactive Publication Date: 2006-12-27
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Its disadvantages are large amount of integral calculation and slow speed

Method used

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  • Iris positioning method based on morphology and probability statistic
  • Iris positioning method based on morphology and probability statistic
  • Iris positioning method based on morphology and probability statistic

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Embodiment Construction

[0060] Adopt the method of the present invention, at first use Matlab language to write iris positioning software, then the CASIA1.0 iris database of Institute of Automation, Chinese Academy of Sciences is input in the iris positioning software for source data and is processed; Contains an iris image ready for texture analysis. Using a total of 812 iris images of different people and different periods of the same person as source data, 800 of them were accurately located, with a positioning accuracy rate of 98.52%, and the time required to locate an iris image was less than 1 second.

[0061] To sum up, the method of the present invention makes full use of the characteristics of morphology and probability statistics, combined with the gray distribution characteristics of the iris eye image, so as to quickly and accurately locate the iris from the provided iris image.

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Abstract

The invention relates to an iris positioning method, based on combined math altitude technique and probability stat technique, wherein said method comprises: first, binary valuing iris image, using projection to obtain the iris inner round position center; using altitude technique to extract edge to obtain the inner edge of iris inner round; using the distance between positioned round center and each point on edge as one sample, to transform search radius and radius into sample for searching minimum average value, whose average value is the round radius; positioning inner round, and using binary valuing method and math altitude method to obtain the edge of outer round; using the center of inner round to position center of outer round; and positioning outer round as positioning inner round. The invention has low error, high accuracy and high speed.

Description

technical field [0001] The invention relates to an iris positioning method based on mathematical morphology and probability statistics, which belongs to the technical field of image signal processing, and in particular relates to an iris positioning method in iris recognition technology. Background technique [0002] Biometrics is the main direction of current information security development, and it is a frontier research topic in the field of information security in the world. Iris biometrics technology is the most easy-to-operate, high-precision, and most promising technology in the current biometrics technology. It is an important means to solve information security problems, and it is the application of computer image processing technology and pattern recognition technology in the field of information security. This technology is widely used in solving many problems in the field of information security, such as access control system, information security of network tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
Inventor 马争李流华
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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