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Effective image-region detection and segmentation method for iris recognition

An effective image and area detection technology, applied in character and pattern recognition, instruments, digital data authentication, etc., can solve problems such as eyelashes and shadow detection without consideration

Active Publication Date: 2009-09-23
BEIJING IRISKING
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  • Description
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  • Application Information

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Problems solved by technology

Finally, both methods do not consider the detection of eyelashes and shadows, so their segmentation results still contain invalid regions

Method used

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  • Effective image-region detection and segmentation method for iris recognition
  • Effective image-region detection and segmentation method for iris recognition
  • Effective image-region detection and segmentation method for iris recognition

Examples

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Embodiment 1

[0140] Embodiment 1: Application of an effective image region detection and segmentation method for iris recognition in an entry-exit personnel verification system based on iris recognition.

[0141] The present invention can be widely applied to the scene of using the iris for identity authentication and identification. A typical application is the identity authentication of airport (or customs) entry and exit personnel. Assuming that an iris recognition system is installed at the immigration inspection office of an international airport, when Mr. Zhang returns home from a business trip in Europe, the airport needs to authenticate Mr. Zhang's identity. At this time, Mr. Zhang only needs to look at the iris recognition acquisition camera, and the iris recognition system can input the collected iris image into the iris recognition algorithm system developed based on the present invention. The algorithm system first determines whether the input image contains an iris according ...

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Abstract

The invention discloses an effective image-region detection and segmentation method for iris recognition. The method comprises: S1, roughly positioning an iris on the basis of Purkinje image analysis in an iris image; S2, accurately positioning the inner and outer boundaries of the iris on the basis of an elastic force model; S3, positioning upper and lower eyelids of the iris on the basis of sorting filtering and histogram filtering; and S4, detecting lashes and shadow on the basis of a lash-shadow blocking-degree prediction model in the image. The method can rapidly and accurately obtain the boundaries of the iris, effectively solves the problems that the conventional iris segmentation algorithm is low in speed and precision, and provides rapid reliable positioning and segmenting results for subsequent iris feature analysis. The method can be widely used in a large number of application systems using iris recognition for identity recognition and security protection.

Description

technical field [0001] The invention relates to the technical fields of digital image processing, pattern recognition and statistical learning, in particular to an effective image region detection and segmentation method for iris recognition. Background technique [0002] The iris is the richly textured ring-shaped area of ​​the human eye between the black pupil and the white sclera. A large number of medical and computer science studies have shown that the iris has the advantages of high uniqueness, strong stability, and non-invasiveness. These advantages make the iris particularly suitable for identification and identification of people, and have been successfully applied to identification in airports, customs, banks and other occasions. [0003] Iris recognition completes the authentication or identification of the user's identity by analyzing the iris image captured by the iris imaging device. When the iris imaging device obtains the iris image, it will inevitably coll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/46G06K9/52G07C9/00G06F21/00G06F21/32
Inventor 谭铁牛孙哲南何召锋邱显超
Owner BEIJING IRISKING
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