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A pupil center localization 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 model and cannot accurately locate the pupil center, etc., and achieves the effect of high robustness, high speed and small amount of calculation.

Active Publication Date: 2022-07-01
ZHONGBEI UNIV
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  • 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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  • A pupil center localization method based on star rays
  • A pupil center localization method based on star rays
  • A pupil center localization method based on star rays

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Experimental program
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Effect test

Embodiment 1

[0034] The present invention is a method for locating pupil center based on star rays, and the present invention adopts a 1*7 median filter template.

[0035] 1 Image preprocessing

[0036] 2 Detection of 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 by yolov3.

[0038] 3 Pupil area binarization

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

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

[0041] 2). The average value of the pixels greater than the threshold value a is recorded as b, and the average valu...

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Abstract

The invention belongs to the technical field of image processing, and in particular relates to a pupil center positioning method based on star rays. The invention firstly preprocesses the picture, and then uses the star ray algorithm to detect the pupil area, obtains the binarized threshold through the iterative method in the ROI area, optimizes the binarized pupil area, and eliminates the star ray edge point error. The invention can accurately detect the pupil center point under the occlusion condition. The present invention better meets the requirements of real-time performance and robustness.

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 accuracy of pupil center positioning will directly and profoundly affect the next processing and analysis. The first step in gaze tracking is to locate the center of the pupil. 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 diagnosis provide an objective, quantitative, and powerful way to record a reade...

Claims

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Application Information

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Patent Type & Authority Patents(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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