A 3-D line-of-sight estimation method based on iris projection matching function

A technology of projection matching and line of sight estimation, which is applied in the field of line of sight tracking, can solve the problem of less calibration points, etc., achieve the effect of less calculation, high accuracy, and improve the overall accuracy

Active Publication Date: 2019-02-05
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

However, the main difficulty of this type of method lies in 1) accurately locating the three-dimensional center of the human eye; 2) the calibration steps are simple and use fewer calibration points; 3) how to correct the optical axis to obtain the visual axis

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  • A 3-D line-of-sight estimation method based on iris projection matching function
  • A 3-D line-of-sight estimation method based on iris projection matching function
  • A 3-D line-of-sight estimation method based on iris projection matching function

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Embodiment Construction

[0039] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be pointed out that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all those skilled in the art can obtain without creative work. Other embodiments all belong to the protection scope of the present invention.

[0040] Such as figure 1 As shown, the hardware configuration of the present invention requires an ordinary camera, which is located directly above the center of the screen, and captures the RGB image and the depth image of the face in real time.

[0041] Such as figure 2 Shown, the specific implementation steps of the present invention are as follows:

[0042] Step 1: Eyeball model user parameter calibration;

[0043] Step 2: Calibrate the rotation radius of the eyeball model ...

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Abstract

The invention discloses a three-dimensional line of sight estimation method based on an iris projection matching function. The method firstly calculates human eye parameters and establishes a human eye model by letting a user look at a plurality of standard points on a screen. Then, the spatial position and orientation of the iris are located by the matching function of the eye rotation model andthe iris projection, and the three-dimensional optical axis direction is obtained. Finally, the polynomial correction method is used to correct the optical axis and calculate the direction of the three-dimensional axis of view. This method uses depth camera to estimate 3D line of sight, which provides a fast, accurate and robust solution for 3D line of sight tracking in natural environment.

Description

technical field [0001] The invention relates to the technical field of line of sight tracking, in particular to a three-dimensional line of sight tracking method using a three-dimensional sensor. Background technique [0002] Gaze tracking technology is one of the most important human-computer interaction technologies, and has important application prospects in the fields of psychological analysis, virtual reality, medical equipment, and assisted driving. [0003] Gaze tracking methods are mainly classified into contact methods and non-contact methods. The camera-based non-contact method is more user-friendly, has natural and direct advantages, and is currently the mainstream research direction of eye-tracking as a human-computer interaction method. Due to the advancement and popularization of 3D sensor technology, the 3D gaze tracking algorithm using 3D sensors has gradually become the mainstream gaze tracking algorithm due to its high precision and robustness to head move...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06T7/73
CPCG06T7/74G06T2207/30196G06V40/18G06V40/193G06V40/197
Inventor 秦华标卓林海
Owner SOUTH CHINA UNIV OF TECH
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