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Topographic Analysis of Ocular Fundus Using the Fourier Transform Method for Projected Grating Images |
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| Authors: | Yoshimura Takeaki Kohinata Nobuaki Nakatani Hajime Suzuki Norihito |
| Institution: | (1) Department of Computer and Systems Engineering, Faculty of Engineering, Kobe University, Rokko, Nada, Kobe 657, Japan;(2) Seitoku Memorial Hospital, Ayazono, Takaishi, Osaka 592, Japan;(3) Department of Precision Engineering, Osaka Electro-Communication University, Hatsumachi, Nayagawa, Osaka 572, Japan |
| Abstract: | In topography measurements of a local ocular fundus of the human eye using a grating-pattern projection technique, a pre-processing method to detect fringes accurately and a generalized Fourier transform method to analyze the fringe deformations are proposed. The method of analysis compensates for fringe deformations caused by instrumental characteristics. By combining the two methods, depth information can be determined with high accuracy. It is shown that the topographic parameters of the optic disc and the fundus slopes in the rim area are obtained with good reproducibility. |
| Keywords: | topography Fourier transform method pattern projection glaucoma ocular fundus |
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