| 人眼角膜曲率测量系统的研究 |
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| 引用本文： | 闫洁,孟鹏花,赵俊奇.人眼角膜曲率测量系统的研究[J].应用基础与工程科学学报,2011(Z1):254-261. |
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| 作者姓名： | 闫洁 孟鹏花 赵俊奇 |
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| 作者单位： | 中北大学光电仪器厂; |
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| 基金项目： | 科技部科技成果重点推广项目(2003EC00084); 太原市科技创业种子基金项目(082114) |
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| 摘 要： | 为解决人眼角膜曲率测量的方法和精度,设计了一套基于图像处理的自动测量角膜曲率参数的测量系统.该研究方法是以角膜反射成像原理为基础,将3个同心圆环投射到眼睛角膜,经角膜反射成像在CCD上,求取全局阈值算法进行二值化图像处理,并进行关键区域特征提取二值化图像,先用Sobel边缘提取方法检测出椭圆环的轮廓,然后用数学形态学的边界平滑及骨架提取方法得到关键区域骨架,最后用最小二乘法拟合曲线计算出角膜的曲率参数.实验采用角膜曲率计用计量标准器进行了测试,结果表明研制的全自动角膜曲率仪符合国家计量检定规程的要求.使用全自动角膜曲率仪测量角膜曲率参数方便、快速、准确.
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| 关 键 词： | 反射成像原理 角膜曲率仪 曲率半径 最小二乘法 |
Research of Curvature Measuring System of Eyes Cornea |
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| YAN Jie,MENG Penghua,ZHAO Junqi.Research of Curvature Measuring System of Eyes Cornea[J].Journal of Basic Science and Engineering,2011(Z1):254-261. |
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| Authors: | YAN Jie MENG Penghua ZHAO Junqi |
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| Institution: | YAN Jie,MENG Penghua,ZHAO Junqi (Photoelectric Instrument Company North University of China,Taiyuan 030051,China) |
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| Abstract: | To design a new measurement system of eyes corneal curvature based on image processing to improve precision of corneal curvature measurement.In this research,based on the principle of reflection imaging of eyes cornea,three concentric rings were projected onto the eyes cornea and the reflected image shapes on the CCD.The image was processed to binary image with the global threshold algorithm and featuring extraction in critical areas.First,by using Sobel edge extraction to detect the profiles of oval rings,... |
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| Keywords: | principle of reflection imaging keratometer radius of curvature least square method |
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