Illumination-robust fast iris localization method

A positioning method and iris technology, which is applied in the direction of instruments, character and pattern recognition, computer components, etc., can solve the problems of large iris positioning deviation and achieve high practical value and wide application prospects

Inactive Publication Date: 2018-05-01
WUHAN INSTITUTE OF TECHNOLOGY
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a

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  • Illumination-robust fast iris localization method
  • Illumination-robust fast iris localization method
  • Illumination-robust fast iris localization method

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[0040] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

[0041] The fast iris positioning method with robust illumination in the embodiment of the present invention, such as figure 1 As shown, including the following steps:

[0042] S1. Input a natural light photo of a frontal face, and use the local active appearance model to detect the position of the eye area on the input face image;

[0043] S2. Perform the edge operator on the eye area, obtain the edge image of the eye area, calculate the fitting curve of the eye edge, and find the inner and outer corner points of the eye; and use the line of the corner points as the reference line to deflection an...

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Abstract

The invention discloses an illumination robust iris rapid positioning method, comprising the following steps: inputting a natural illumination photo of a front face, using a local active appearance model to detect the position of the eye region on the input face image; Execute the edge operator in the eye area, obtain the edge image of the eye area, calculate the fitting curve of the eye edge, and find the inner and outer corners of the eyes; and use the connection line of the corners of the eyes as a reference line to correct the deflection angle of the face; connect The inner and outer corner points, and the center point of the connection line as the starting search position, searches the boundary of the iris area; the distance between the detected left and right boundary points of the iris is the diameter of the iris, and the center point of the connection line is the located iris center point, output the center point coordinates and diameter of the iris. The present invention realizes the positioning of the center point of the human eye under the condition of using natural light, thereby having certain robustness to light and eyelid occlusion.

Description

Technical field [0001] The invention relates to the field of image processing and pattern recognition, in particular to a method for detecting and positioning the center point of the eye iris in a frontal face image under natural light conditions. Background technique [0002] Under natural lighting, eye center positioning and gaze direction detection on face images with general resolution have gradually become a research hotspot in computer vision and human-computer interaction in recent years. The iris detection method of the eye movement recognition instrument based on infrared light source and high-resolution camera uses the bright pupil characteristic of the iris area to infrared light to realize the detection of the iris. The disadvantage of this method is that it requires a dedicated infrared light device to control the light. There are special requirements. [0003] Under natural lighting conditions, integrating features such as the gray level of the local area of ​​the ey...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00
Inventor 徐国庆
Owner WUHAN INSTITUTE OF TECHNOLOGY
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