At present, the general idea of the 3D line of sight (LoS) estimation is as follows. First, the direction of the 3D line of gaze (LoG) can be reconstructed according to the visual characteristics of the eyeballs (pupil center coordinates, purkinje images coordinates, etc.). Then the transformation matrix of the direction of LoG and the direction of LoS can be calculated based on the Kappa angle between LoG and LoS. LoS can be estimated with known LoG. The transformation matrix between LoG and LoS is usually determined by the user calibration process of the gaze tracking system. Because the eyeball structure is unique and the Kappa is a space angle, the transformation matrix changes with the space location of the eyeball. This paper elaborates on the Kappa angle calibration problem in the gaze tracking system. A new calibration and calculation method of Kappa angle is proposed in this paper, which can solve the calculation of space Kappa angle in the case of head translation, pitch and rotation. Simulation and experimental results verify the effectiveness of the proposed method.
Published in | Science Innovation (Volume 6, Issue 4) |
DOI | 10.11648/j.si.20180604.12 |
Page(s) | 182-189 |
Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
Copyright |
Copyright © The Author(s), 2018. Published by Science Publishing Group |
Gaze Tracking, Kappa Angle, Line of Sight, Line of Gaze
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APA Style
Lu Ning, Zhang Guosheng, Chi Jiannan. (2018). A New Method for Calibration of Kappa Angle in 3D Line of Sight Tracking System. Science Innovation, 6(4), 182-189. https://doi.org/10.11648/j.si.20180604.12
ACS Style
Lu Ning; Zhang Guosheng; Chi Jiannan. A New Method for Calibration of Kappa Angle in 3D Line of Sight Tracking System. Sci. Innov. 2018, 6(4), 182-189. doi: 10.11648/j.si.20180604.12
AMA Style
Lu Ning, Zhang Guosheng, Chi Jiannan. A New Method for Calibration of Kappa Angle in 3D Line of Sight Tracking System. Sci Innov. 2018;6(4):182-189. doi: 10.11648/j.si.20180604.12
@article{10.11648/j.si.20180604.12, author = {Lu Ning and Zhang Guosheng and Chi Jiannan}, title = {A New Method for Calibration of Kappa Angle in 3D Line of Sight Tracking System}, journal = {Science Innovation}, volume = {6}, number = {4}, pages = {182-189}, doi = {10.11648/j.si.20180604.12}, url = {https://doi.org/10.11648/j.si.20180604.12}, eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.si.20180604.12}, abstract = {At present, the general idea of the 3D line of sight (LoS) estimation is as follows. First, the direction of the 3D line of gaze (LoG) can be reconstructed according to the visual characteristics of the eyeballs (pupil center coordinates, purkinje images coordinates, etc.). Then the transformation matrix of the direction of LoG and the direction of LoS can be calculated based on the Kappa angle between LoG and LoS. LoS can be estimated with known LoG. The transformation matrix between LoG and LoS is usually determined by the user calibration process of the gaze tracking system. Because the eyeball structure is unique and the Kappa is a space angle, the transformation matrix changes with the space location of the eyeball. This paper elaborates on the Kappa angle calibration problem in the gaze tracking system. A new calibration and calculation method of Kappa angle is proposed in this paper, which can solve the calculation of space Kappa angle in the case of head translation, pitch and rotation. Simulation and experimental results verify the effectiveness of the proposed method.}, year = {2018} }
TY - JOUR T1 - A New Method for Calibration of Kappa Angle in 3D Line of Sight Tracking System AU - Lu Ning AU - Zhang Guosheng AU - Chi Jiannan Y1 - 2018/07/20 PY - 2018 N1 - https://doi.org/10.11648/j.si.20180604.12 DO - 10.11648/j.si.20180604.12 T2 - Science Innovation JF - Science Innovation JO - Science Innovation SP - 182 EP - 189 PB - Science Publishing Group SN - 2328-787X UR - https://doi.org/10.11648/j.si.20180604.12 AB - At present, the general idea of the 3D line of sight (LoS) estimation is as follows. First, the direction of the 3D line of gaze (LoG) can be reconstructed according to the visual characteristics of the eyeballs (pupil center coordinates, purkinje images coordinates, etc.). Then the transformation matrix of the direction of LoG and the direction of LoS can be calculated based on the Kappa angle between LoG and LoS. LoS can be estimated with known LoG. The transformation matrix between LoG and LoS is usually determined by the user calibration process of the gaze tracking system. Because the eyeball structure is unique and the Kappa is a space angle, the transformation matrix changes with the space location of the eyeball. This paper elaborates on the Kappa angle calibration problem in the gaze tracking system. A new calibration and calculation method of Kappa angle is proposed in this paper, which can solve the calculation of space Kappa angle in the case of head translation, pitch and rotation. Simulation and experimental results verify the effectiveness of the proposed method. VL - 6 IS - 4 ER -