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Image processing method and device of iris positioning

An iris and image technology, applied in the fields of biometrics and image processing, can solve problems such as poor segmentation accuracy and blurred iris boundaries.

Active Publication Date: 2015-03-25
EYESMART TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Tan Tieniu et al. used canny edge detection and least squares method to fit the iris boundary in their patent CN101539991B. Because the iris boundary is often blurred, the segmentation accuracy is not strong

Method used

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  • Image processing method and device of iris positioning
  • Image processing method and device of iris positioning
  • Image processing method and device of iris positioning

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Embodiment Construction

[0036] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0037] First, obtain the human eye image containing the iris area, and then use the adaptive circular projection model algorithm to locate the pupil boundary in the human eye image according to the acquired eye image, and then use the adaptive circular projection model algorithm to locate the iris in the human eye image The outer boundary, and finally the image of the iris region is extracted by removing the eyelid region from the h...

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Abstract

The invention discloses an image processing method and device of iris positioning. The method comprises the steps that a human eye image in an iris area is obtained; the pupil boundary is positioned in the human eye image through a self-adaptation circular arc projection model algorithm; the outer boundary of the iris is positioned in the human eye image through the self-adaptation circular arc projection model algorithm; the eyelid area is removed from the human eye image, and the image of the interested iris area is extracted.

Description

technical field [0001] The invention relates to the fields of image processing and biological identification, in particular to an image processing method and device for iris positioning. Background technique [0002] In the information age, how to correctly determine a person's identity and protect information security has become an important social issue. Traditional biometric authentication methods such as fingerprints and faces are becoming more and more difficult to meet social needs because they are easy to be forged. Compared with other biometric features, the iris has the advantages of uniqueness, stability, non-invasiveness and anti-counterfeiting, which makes the iris recognition technology get widespread attention. [0003] The iris is a ring-shaped area between the pupil and the sclera in the human eye, which contains rich texture information. However, the iris imaging device inevitably collects pupils, sclera, eyelids, eyelashes, etc. while collecting iris imag...

Claims

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Application Information

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IPC IPC(8): G06K9/32G06K9/54G06T7/00
CPCG06T7/75G06V40/18G06V10/25
Inventor 马超玉杨怀恒张虎王晓鹏
Owner EYESMART TECH
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