Fig. 1. Flow chart of Pupil position extraction algorithm

Fig. 2. Input image and bilateral filtered image

Fig. 3. Binary image and binary image after median filtered

Fig. 4. Contour image and inner contour image

Fig. 5. The result image of pupil position calculation

Fig. 6. The first pupil simulation image and the last pupil simulation image

Fig. 7. The RMS of pupil position calculation results in different TError

Fig. 8. The RMS of circle fitting，direct ellipse fitting and proposed the method

Fig. 9. The pupil position extraction result of circle fitting，direct ellipse fitting and proposed method after adding different proportions of noise

Fig. 10. The pupil position extraction MAX value of circle fitting，direct ellipse fitting and proposed method after adding different proportions of noise

Fig. 11. The pupil position extraction RMS value of circle fitting，direct ellipse fitting and proposed method after adding different proportions of noise

Fig. 12. Accuracy requirements for pupil position extraction

Fig. 13. The pupil position results of different meshod

Fig. 14. The running time of CPU and GPU