Sight tracking method based on near-to-eye camera

A technology of eye-tracking and camera, applied in the field of eye-tracking, can solve problems such as extraction influence, achieve high accuracy, reduce data volume, and good robustness

Active Publication Date: 2021-09-03
CHANGZHOU INST OF TECH
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Problems solved by technology

Due to the fixed connection between the wearable device and the subject's head, it has the advantages of clear imaging and simple image background, but there are still facto

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Embodiment Construction

[0090] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0091] refer to Figure 1 to Figure 12 , a kind of line-of-sight tracking method based on near-eye camera, comprising first adopting near-eye camera to collect eye grayscale image, is characterized in that: also comprises the following steps:

[0092] Step1. Eye image preprocessing;

[0093] Step2. Sight feature extraction;

[0094] Step3. Estimation of line of sight.

[0095] Preferably, Step1 includes the following sub-steps:

[0096] Step11. Obtain the ...

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Abstract

The invention discloses a sight tracking method based on a near-to-eye camera, and the method is characterized in that the method comprises the steps: employing the near-to-eye camera to collect an eye gray image, and also comprises the following steps: Step 1, preprocessing the eye image; step 2, carrying out sight line feature extraction; and step 3, estimating a sight line drop point. The Step1 comprises the following sub-steps: Step11, obtaining a region of interest: obtaining the region of interest containing a complete pupil part in an eye grayscale image; and step 12, median filtering: carrying out median filtering on the eye grayscale image of the obtained region of interest. The invention provides a sight tracking method based on a near-to-eye camera, the method solves the problem that shadow area noise and reflected light spots interfere pupil edge extraction, and meanwhile, a corresponding sampling point selection algorithm is provided according to different shielding conditions of pupils, so that the accuracy of pupil center positioning is improved. The sight tracking method has the advantages of being high in robustness, high in pupil center positioning precision, good in real-time performance and the like.

Description

technical field [0001] The present invention relates to the technical field of eye-tracking, in particular to a method for eye-tracking based on a near-eye camera. Background technique [0002] The line of sight of the human eye can reflect the information that people pay attention to. Eye tracking technology is a technology that uses various detection methods such as software algorithms, machinery, electronics, and optics to obtain the current line of sight direction of the subject. It is widely used in human-computer interaction, assisted driving, psychological Research, virtual reality and military and many other fields. [0003] In recent years, with the development of computer and image processing technology, eye-tracking technology based on video image processing has gradually become the mainstream. Today's eye-tracking systems are mainly divided into two categories: wearable and non-wearable. Among them, wearable means that the subjects wear helmets, glasses and oth...

Claims

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Application Information

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IPC IPC(8): G06F3/01G06K9/00
CPCG06F3/013
Inventor 王鹏袁洪春戚建宇张燕樊家华宋子洋周文豪
Owner CHANGZHOU INST OF TECH
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