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Pupil center positioning method based on star rays

A center positioning and star ray technology, which is applied in the field of pupil center positioning based on star rays, can solve the problems of complex learning models and inability to accurately locate the pupil center, and achieve high robustness, fast speed, and good real-time effects

Active Publication Date: 2020-07-03
ZHONGBEI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its learning model is relatively complicated and cannot meet the requirements of accurately locating the center of the pupil

Method used

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  • Pupil center positioning method based on star rays
  • Pupil center positioning method based on star rays
  • Pupil center positioning method based on star rays

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Embodiment 1

[0034] The present invention is a pupil center positioning method based on star rays. The present invention adopts a 1*7 median filter template.

[0035] 1 Image preprocessing

[0036] 2 Detection of the pupil area

[0037] The pupil area is detected by yolov3, and the detection effect is as follows figure 2 Shown: Take the center point of the pupil area detected by yolov3 as the point inside the pupil area; take the center point of the pupil area as the center, emit rays every 20°, and get 18 pupil edge points. The pupil area can be detected accurately and efficiently through yolov3.

[0038] 3 Binarization of the pupil area

[0039] In the ROI area, the binarization threshold is obtained through an iterative method. The algorithm steps are as follows:

[0040] 1). Find the average value of the gray scale in the area, denoted as a, and set the initial threshold as a;

[0041] 2). The average value of pixels whose statistics are greater than the threshold a is recorded a...

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Abstract

The invention belongs to the technical field of image processing, and particularly relates to a pupil center positioning method based on star rays. The method comprises the following steps: preprocessing a picture, detecting a pupil region through a star ray algorithm, obtaining a binarized threshold value in an ROI region through an iterative method, optimizing the binarized pupil region, and eliminating star ray edge point errors. According to the invention, the pupil center point under the shielding condition can be accurately detected. According to the method, the requirements of real-timeperformance and robustness are better met.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a pupil center positioning method based on star rays. Background technique [0002] Pupil localization is the first and most important step in many computer vision applications. For example, face recognition, facial feature tracking, facial expression analysis, and iris detection and positioning are also inseparable from pupil positioning. The positioning accuracy of the pupil center will directly and profoundly affect the next processing and analysis. The first step in gaze tracking is to locate the pupil center. Gaze-tracking systems provide a powerful analytical tool for real-time cognitive processing and information transfer. There are roughly two important application areas for gaze tracking: diagnostic analysis and human-computer interaction. Eye-tracking systems for diagnostics provide an objective, quantifiable and powerful way to record a reader'...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/181G06T7/136G06T5/00G06N3/04
CPCG06T7/0012G06T7/181G06T7/136G06T2207/30041G06T2207/20032G06N3/045G06T5/70
Inventor 韩慧妍马启玮韩燮杨婷李俊伯
Owner ZHONGBEI UNIV
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