Diopter Measurement Method Based on Retina Image Processing

摘要：

In order to solve the problem of border blur between dark background and bright ring image, a geometrical plane parameter measurement method based on retina images processing has been proposed in this paper. The key technique is to locate the image edge points by Gauss curve fitting and curvature filtering. Firstly, annular reflecting images are obtained by auto refractometer measurement system. Secondly, the coordinates of sub-pixel edge points are acquired through Gauss curve fitting method. Thirdly by curvature filtering method the noisy points are eliminated. Finally, the geometrical plane parameters of retina image are calculated after fitting ellipse track with the least-squares method. Thus human eye diopter can be calculated. The experimental results demonstrate the accuracy, stability and validity of the retina image processing method.

关键词： diopter measurement sub-pixel edge extraction curvature filtering auto refractometer

作者: YAN-JIE

作者单位: Photoelectric Instrument Company, North University of China, Taiyuan 030051, China

会议类型: 国际会议

会议名称: 2011 International Conference on Electronics and Optoelectronics(2011电子学与光电子学国际会议 ICEOE 2011)

会议地点: 大连

会议语种:英文

页码: 445-449

在线出版日期: 2011-07-29（万方平台首次上网日期，不代表论文的发表时间）