Suchin AdhanChuchart PintaviroojArthorn SanpanichKing Mongkut's Institute of Technology LadkrabangMahidol University2018-10-192018-10-192013-12-01BMEiCON 2013 - 6th Biomedical Engineering International Conference. (2013)2-s2.0-84893279585https://repository.li.mahidol.ac.th/handle/20.500.14594/31725This paper proposes a method for accurate measurement of a three-dimensional of an eye's pupil by combining local stereo images which are acquired from multiway. A calibrated mini CCD camera is used to capture the side-by-side image of one eye by two plane mirrors to create a reflection of the two directions of the eye at a time. The center of mass is used for two-dimensional coordinates of the center of the pupil. The new and simple technique to solve the problem of geometric distortion is proposed by taking advantage of the Direct Linear Transformation (DLT), which requires only a single step in the refinement stage without changing or reinstalling a camera. The DLT algorithm was used for the three-dimensional coordinates of the center of the pupils from the previous two-dimensional coordinates for the three-dimensional position of the eyes is detected. The results are the statistical errors only slight, mean = 0.16°, S.D. = 0.15°, which shows that the system is suitable for high-precision medical applications for the movement of the human eye. © 2013 IEEE.Mahidol UniversityEngineeringConference PaperSCOPUS10.1109/BMEiCon.2013.6687685