Abstract
In order to get high-performance gaze direction, this paper proposes a three-dimensional view estimation method based on double cameras and double light source, to overcome the natural head movement under relatively large, estimated accuracy of sight. This paper presents a completely rely on spatial geometry calculations to achieve the user's line of sight placement calculation method. First calibrate the camera, and then use of calibrated cameras to the three-dimensional position of display screen and a light source for calibration; Due to the corneal curvature center and the pupil center on the same optical axis, so to determine the spatial orientation of the optical axis through the center of curvature of the cornea is calculated and imaginary pupil center; Second to determine the optical axis, the article does not directly estimation deviation angle of optical axis and optical axis Kappa, but by calibrate rotation matrix of a 3 * 3 M indirectly obtained the relationship between the optical axis and visual axis, to determine the visual axis direction; Finally through calculation to get the intersection of the visual axis and screen, That fixation point.
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Changyuan, W., Li, W. & Pengxiang, X. The line of sight to estimate method based on stereo vision. Multimed Tools Appl 75, 12123–12136 (2016). https://doi.org/10.1007/s11042-016-3283-8
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DOI: https://doi.org/10.1007/s11042-016-3283-8