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Free-space head-wearing eye-tracking system

A line-of-sight tracking and free-space technology, applied in the field of line-of-sight tracking, can solve problems such as complex calibration methods, equipment immobility, and difficulty in use, achieving high-precision line-of-sight tracking effects, good user experience, and improved tracking accuracy

Active Publication Date: 2016-11-30
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

The calibration method of this type of method is relatively complicated, and it is difficult for the wearer's head to move freely. During use, the device cannot move on the wearer's head, which is difficult to use in practical applications.

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  • Free-space head-wearing eye-tracking system
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Embodiment Construction

[0034] The following clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. 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.

[0035] The embodiment of the present invention provides a method for realizing a head-mounted sight tracking system in free space, which can track the three-dimensional coordinates of the gaze point of the wearer's binocular sight in three-dimensional free space, and mark it in the scene video; no need for tedious training and calibration , the wearer can use it after wearing it, and the user experience is good; the user's head can move freely, and the device can move freely on the wearer's head during use; after simple calibration, ...

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Abstract

The invention discloses a free-space head-wearing eye-tracking system. The free-space head-wearing eye-tracking system comprises a head-wearing video collection device, a unit for evaluating the binocular optic axis through stereoscopic vision and a binocular vision and fixation point evaluation unit; the head-wearing video collection device collects four ways of near-infrared eye video and one way of scene video simultaneously, and the four ways of the near-infrared eye video comprise two ways of the near-infrared eye video of the left eye of a wearer who wears the head-wearing video collection device and two ways of the near-infrared eye video of the right eye of the wearer who wears the head-wearing video collection device; coordinates of pupils of both eyes and cornea center are evaluated directly through a stereoscopic vision method, and a binocular optic axis straight line equation is calculated; a binocular visual axis straight line equation is evaluated according to an eyeball Kappa angle and the binocular optic axis straight line equation, a fixation point coordinate is calculated, the position of a fixation point in the scene video is mapped and marked, and the Kappa angle is a fixed included angle between the optic axis and the visual axis of each eyeball.

Description

technical field [0001] The invention relates to the field of sight tracking, in particular to a free-space head-mounted sight tracking system. Background technique [0002] Gaze tracking technology mainly uses eye movement measurement equipment to record the movement of eyeballs, so as to judge the direction of people's sight and achieve the purpose of tracking people's sight. Vision is the main way for people to obtain information. Due to the characteristics of directness, naturalness and bidirectionality of sight, gaze tracking technology has broad application prospects in the fields of human-computer interaction, psychological and behavioral analysis. [0003] The current gaze tracking system is mainly based on image processing and computer vision methods, which can be roughly divided into long-distance desktop device gaze tracking methods and head-mounted device gaze tracking methods. Since the long-distance desktop gaze tracking system is far away from the eyes, it has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/01
Inventor 张义飞李斌邓宏平张伟陈昭希容圣海
Owner UNIV OF SCI & TECH OF CHINA
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