A Method of Eye Tracking Based on Iris Features

A gaze tracking and gaze direction technology, applied in image analysis, instruments, computing, etc., can solve problems such as complex hardware devices, complex calibration process, and difficult eye image processing, and achieve the effect of simple hardware requirements and easy image processing

Active Publication Date: 2020-11-10
BEIJING 7INVENSUN TECH
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Problems solved by technology

This method can effectively overcome the problems of (1) difficulty in eye image processing, (2) complex hardware device, (3) not robust to head movement, and (4) complicated calibration process in the existing gaze tracking method based on eye image information. question

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  • A Method of Eye Tracking Based on Iris Features
  • A Method of Eye Tracking Based on Iris Features
  • A Method of Eye Tracking Based on Iris Features

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Embodiment Construction

[0033] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0034] The invention discloses a method for realizing sight tracking based on iris features. The method extracts the internal texture features of the iris for the first time, and obtains the rotation transformation relationship between the current iris plane and the reference iris plane by matching the feature points in the current and reference iris images, Combining the sight direction of the reference iris plane and the current iris center position, the sight direction is obtained.

[0035] The present invention is applicable to the problem of eye tracking where the relative positions of the camera and...

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Abstract

The invention discloses a method for realizing sight tracking based on iris features. The method comprises the steps of firstly extracting internal texture features of an iris, acquiring a rotation vector and a translation vector of a current iris image relative to a reference iris image through matching features points in the current iris image and features points in the reference iris image, calculating the sight direction of a current frame through being combined with the current frame with the size of the iris in the reference iris image, the distance between reference iris center and an optical center of a camera and the sight direction of a reference iris plane, and finally acquiring a sight line according to features of the sight when passing through the iris center of the current frame. The method disclosed by the invention has the advantages that accurate iris feature points are acquired relatively easily by image processing; hardware requirements are simple, and only one camera is required to shoot the iris features; head movements do not affect sight tracking results; and algorithm requirements can be met by at least one calibration point, and the calibration process is simple and easy to implement.

Description

technical field [0001] The invention relates to the technical fields of computer vision, image processing, photographic geometry and the like, and in particular to a method for realizing sight tracking based on iris features. Background technique [0002] Gaze tracking is a technology that uses eye movement measurement equipment to measure the movement of the eyes and estimate the direction of the gaze or the location of the gaze point. Due to the direct and accurate estimation of sight line, sight tracking technology has a wide range of applications in the fields of human-computer interaction, medical diagnosis and rehabilitation of the disabled, and also has good application prospects in the fields of virtual reality and intelligent perception. The existing methods for measuring eye movement mainly include: mechanical recording method, electromagnetic recording method, current recording method and optical recording method. Among them, the mechanical recording method and t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06K9/46G06T7/246
Inventor 黃通兵任冬淳沈丁成
Owner BEIJING 7INVENSUN TECH
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