Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for judging eye state based on pupil features

An eye state and pupil technology, applied in the field of gaze tracking, can solve the problem of low accuracy

Active Publication Date: 2021-05-14
永目堂股份有限公司
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of method is prone to interference from eyelids, eyelashes and mirror reflections, and the accuracy is not high

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for judging eye state based on pupil features
  • A method for judging eye state based on pupil features
  • A method for judging eye state based on pupil features

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The embodiment of the present invention provides a method for realizing gaze tracking based on pupil features, please refer to figure 1 , figure 1 It is a flowchart of a method for judging an eye state based on pupil features provided by an embodiment of the present invention. The method includes:

[0046] Obtain eye image information map;

[0047] Determine the pupil center point according to the eye image information map;

[0048] Extracting pupil edge points according to the pupil center point;

[0049] The symmetry of the pupil edge points is judged to determine the state of the eye state.

[0050] Wherein, after the eye image information map is acquired, the eye image information map is processed, and the eye parts in the information map are adjusted to a horizontal position.

[0051] Wherein, in the above-mentioned embodiment, according to the eye image information map, before determining the pupil center point, it also includes:

[0052] Perform grayscale c...

Embodiment 2

[0100] Please refer to figure 2 , figure 2 A schematic diagram of pupil features in an open state provided for an embodiment of the present invention.

[0101] Such as figure 2 As shown, several black spots at the junction of the white of the eye and the pupil are pupil edge points. Taking the pupil as the center point, five rays are drawn from the upper half of the pupil center point, and correspondingly, five rays are symmetrically drawn from the lower half of the pupil center point. 5 pupil edge points are obtained in the upper part of the pupil, and 5 pupil edge points are obtained in the lower part of the pupil, assuming that both the horizontal symmetry threshold Tx and the vertical symmetry threshold Ty are 0.3.

[0102] by the formula inferred,

[0103]

[0104] Therefore, the horizontal symmetry and vertical symmetry of the pupil edge points are good, and it can be judged that the eyes are in an open state.

[0105] Please refer to image 3 , image 3 A...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention provides a method for judging eye state based on pupil features, the method comprising: obtaining an eye image information map; determining a pupil center point according to the eye image information map; and extracting pupil edge points according to the pupil center point ; Judging the symmetry of the pupil edge points to determine the state of the eye state. The advantages of the method for judging the state of the eye based on the pupil feature provided by the present invention are: no interference from eyelids, eyelashes and mirror reflections, etc., high accuracy; no need for a large number of training samples, simple algorithm, high calculation efficiency; no need for expensive and complicated equipment, low cost.

Description

technical field [0001] The present invention relates to eye-tracking technology, in particular to a method for judging eye state based on pupil features. Background technique [0002] Gaze tracking technology is a human-computer interaction method that has emerged in recent years. Gaze tracking is also known as eye tracking, which plays an important role in the military, assisting the disabled, psychological research, and web page analysis. The method of eye-tracking technology has experienced nearly a hundred years of development. It has successively adopted mechanical recording method, current recording method, electromagnetic recording method and contemporary optical recording method. come higher. [0003] In practical applications, human eyes have random blinking activities. When the eyes are closed, the exact position of the pupil center cannot be obtained, resulting in the inability to accurately locate the position of the gaze point. Therefore, eye tracking may be ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06T7/13G06F3/01
CPCG06F3/013G06T7/13G06V40/18
Inventor 郑钰辉张捷
Owner 永目堂股份有限公司