Method for determining position of fixation point in three-dimensional scene by adopting scanner and eye tracker

Abstract

The invention discloses a method for determining the position of a fixation point in a three-dimensional scene by adopting a scanner and an eye tracker, and belongs to the technical field of eye movement tracking. Three-dimensional scanning and modeling are carried out on a three-dimensional scene through a 3D scanner, then three non-collinear points are positioned through an eye tracker, and thecoordinate conversion relation between the eye tracker and the scanner is established. Establishing a gaze linear equation according to the virtual plane gaze point coordinates of the eye tracker andthe eye coordinates; a sight point set is obtained by setting a cylindrical threshold value, a fixation point is searched out by minimizing the distance between the sight point set and the eyes, moreaccurate three-dimensional fixation point coordinates are further solved by solving a fixation straight line vertical plane method, and an analytical expression of the coordinates is given, so that accurate and quick tracking of a three-dimensional scene of eye fixation is realized. According to the method, the defects of complex calculation and huge calculated amount of a traditional method are avoided.

Description

technical field [0001] The present invention relates to the technical field of eye movement tracking, in particular to a calculation method for solving gaze point positions in three-dimensional space. Background technique [0002] Eye tracking technology, also known as eye tracking technology, is currently mainly used in web page layout optimization, scene research, human-computer interaction, virtual reality, clinical medicine and other fields. Gaze tracking currently relies on eye tracker equipment to achieve. There are currently two types of eye trackers on the market: head-mounted and telemetry eye trackers. The head-mounted eye tracker needs to wear a helmet on the head or wear glasses on the eyes, which adds a certain burden to the subjects. The telemetry eye tracker does not need to wear any device for the subjects, which has little interference to the subjects, and can detect the eye movement data of the natural state of the subjects. [0003] The most critical te...

AI Technical Summary

Problems solved by technology

This method leads to the need to face a huge amount of eye movement data in the follow-up analysis; the position of the telemetry single camera eye tracker and the plane scene is relatively fixed, and the establishment of the scene model is completed through the calibration process, that is, the calibration of the eye tracker , The relative positional relationship between the observed object and the test object, and established a coordinate system based on the eye tracker

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