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Three-dimensional gaze estimation method based on irises and pupils

A line of sight estimation and iris technology, applied in the field of line-of-sight tracking, can solve the problems of increasing the complexity of eye features, the influence of mapping models, and the dependence of estimation accuracy, so as to meet the requirements of human-computer interaction systems, flexible device locations, and high line-of-sight estimation accuracy. Effect

Inactive Publication Date: 2015-11-25
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

However, due to the calculation of stereo eye parameters, the complexity of eye feature detection and parameter extraction is increased. The estimation accuracy depends on the accuracy of stereo vision, and the individual differences of different users, head movement and other issues will also affect the mapping model. have a direct impact

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  • Three-dimensional gaze estimation method based on irises and pupils
  • Three-dimensional gaze estimation method based on irises and pupils
  • Three-dimensional gaze estimation method based on irises and pupils

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Embodiment Construction

[0026] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0027] Such as figure 1 , the present invention requires dual cameras 101 and an infrared light source 102, and the cameras are located directly above the center of the display screen 112 to capture facial images in real time. The cameras have a resolution of 640×480 and a focal length of 10mm. They are placed side by side above the display. The distance between the lenses of the two cameras is about 5cm. The distance between the center of the dual cameras and the bottom of the display is 26cm. Infrared light with a wavelength of 850nm is selected as an auxiliary light source and placed in front of the display screen to illuminate the face.

[0028] Such as figure 2 , the specific implementation steps of the gaze tracking algorithm are as follows:

[0029] Step 1: gaze at the calibration point 110, and extract eye movement feature inform...

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Abstract

The invention discloses a three-dimensional gaze estimation method based on irises and pupils. The method comprises the steps that the characteristic that the centers of the pupils and the centers of the irises do not share the same point in the three-dimensional space is utilized, the centers of the pupils and the centers of the irises form the direction of the optical axis, the visual axis of eyes and the optical axis intersect with the center of curvature of the corneas, the direction of the visual axis of the eyes is obtained through calculation of the direction of the optical axis by calculating the deflection angle between the optical axis and the visual axis of the eyes, and in other words, the three-dimensional gazing direction of the human eyes is obtained. The novel high-precision model method is provided for three-dimensional gaze estimation.

Description

technical field [0001] The invention relates to the technical field of sight tracking, in particular to a three-dimensional sight estimation method based on near-infrared light. Background technique [0002] With the continuous development of information technology and artificial intelligence, the research of human-computer interaction technology has received more attention and attention. Gaze tracking technology based on video image processing is an important branch of human-computer interaction. Many basic theoretical and technical issues have not been well resolved. The key issues are the extraction and expression of eye moving image features such as iris and pupils, and the visual The establishment of the tracking mapping model. [0003] The eye-tracking mapping model is mainly divided into two-dimensional eye-tracking methods and three-dimensional eye-tracking methods. Two-dimensional methods are sensitive to head motion, requiring the user to keep the head still or o...

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Application Information

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IPC IPC(8): G06F3/01G06T7/00G06K9/00
Inventor 秦华标卢杰胡大正
Owner SOUTH CHINA UNIV OF TECH
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