Calculation Method of Eye Vectors Based on Line-of-Sight Horizontal Offset Feature

Huijuan Tian; Siqi Wang

doi:10.3788/LOP202158.2333001

Journals >Laser & Optoelectronics Progress >Volume 58 >Issue 23 >Page 2333001 > Article

Laser & Optoelectronics Progress
Vol. 58, Issue 23, 2333001 (2021)

Calculation Method of Eye Vectors Based on Line-of-Sight Horizontal Offset Feature

Huijuan Tian^1、2、* and Siqi Wang^1、2

Author Affiliations

¹Tianjin Key Laboratory of Optoelectronic Detection and System, School of Electrical and Electronic Engineering, Tiangong University, Tianjin , 300387, China

²Engineering Research Center of Ministry of Education on High Power Solid State Lighting Application System, Tiangong University, Tianjin , 300387, China

show less

DOI: 10.3788/LOP202158.2333001 Cite this Article Set citation alerts

Huijuan Tian, Siqi Wang. Calculation Method of Eye Vectors Based on Line-of-Sight Horizontal Offset Feature[J]. Laser & Optoelectronics Progress, 2021, 58(23): 2333001 Copy Citation Text

show less

Fig. 1. Schematic of eye vectors

Download full size

Fig. 2. Schematic of

d_{L}

and

d_{R}

Download full size

Fig. 3. Failure illustrations of iris segmentation

Download full size

Fig. 4. Left eye appearance and iris segmentation with different gaze directions

Download full size

Fig. 5. Gaze estimation system

Download full size

Fig. 6. Viewing angle error between the estimated line of sight and the actual line of sight

Download full size

Fig. 7. x_{under different viewing angles}

Download full size

Fig. 8. Histograms of horizontal viewing angle error distribution of different models. (a) Model 1; (b) model 2; (c) model 3; (d) model 4

Download full size

Fig. 9. Histograms of gaze angle error distribution of different models. (a) Model 1; (b) model 2; (c) model 3; (d) model 4

Download full size

Model	Polynomial for X	Polynomial for Y
1	$1, x, x^{2}, y, y^{2}, x y, x^{2} y^{2}$	$1, x, x^{2}, y, y^{2}, x y, x^{2} y^{2}$
2	$1, x, x^{2}, y$	$1, x^{2}, y, x y, x^{2} y$
3	$1, x, x^{3}, y^{2}, x y$	$1, x, x^{2}, y, y^{2}, x y, x^{2} y$
4	$1, x, x^{2}, x^{3}, y, x y, x^{2} y, x^{3} y$	$1, x, x^{2}, y, y^{2}, x y, x^{2} y$

Table 1. 4 models

Model	Horizontal viewing angle error /（°）		Error reduction percentage /%	Vertical viewing angle error /（°）		Error reduction percentage /%
Model	Original	Proposed	Error reduction percentage /%	Original	Proposed	Error reduction percentage /%
1	2.22	1.45	34.50	3.29	3.43	-4.29
2	1.69	1.40	17.39	2.93	2.96	-0.96
3	1.71	1.53	10.88	3.25	3.37	-3.86
4	4.73	3.70	21.67	3.25	3.37	-3.86

Table 2. Comparison of the average absolute error of horizontal and vertical viewing angles of different models

Model	Error /（°）		Percentage improvement in accuracy /%
Model	Original	Proposed	Percentage improvement in accuracy /%
1	3.14	2.89	8.16
2	2.93	2.79	4.79
3	3.18	2.92	7.96
4	5.26	4.26	18.90

Table 3. Accuracy comparison of different models

Huijuan Tian, Siqi Wang. Calculation Method of Eye Vectors Based on Line-of-Sight Horizontal Offset Feature[J]. Laser & Optoelectronics Progress, 2021, 58(23): 2333001

Download Citation

Set citation alerts for the article

Tools

Set citation alerts for the article

Save the article for my favorites

Paper Information