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Automatic Measurement of Vertical Cup-to-Disc Ratio on Retinal Fundus Images

机译：视网膜眼底图像上的垂直杯盘比的自动测量

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摘要

Glaucoma is a leading cause of permanent blindness. Retinal fundus image examination is useful for early detection of glaucoma. In order to evaluate the presence of glaucoma, the ophthalmologist may determine the cup and disc areas and diagnose glaucoma using a vertical cup-to-disc ratio. However, determination of the cup area is very difficult, thus we propose a method to measure the cup-to-disc ratio using a vertical profile on the optic disc. The edge of optic disc was then detected by use of a canny edge detection filter. The profile was then obtained around the center of the optic disc in the vertical direction. Subsequently, the edge of the cup area on the vertical profile was determined by thresholding technique. Lastly, the vertical cup-to-disc ratio was calculated. Using seventy nine images, including twenty five glaucoma images, the sensitivity of 80% and a specificity of 85% were achieved with this method.
机译：青光眼是永久失明的主要原因。视网膜眼底图像检查可用于早期检测青光眼。为了评估青光眼的存在，眼科医生可以使用垂直杯盘比例确定杯子和盘状区域并诊断青光眼。然而，杯区的确定非常困难，因此我们提出了一种使用光盘上的垂直轮廓测量杯盘比的方法。然后通过使用罐头边缘检测滤波器检测光盘的边缘。然后在光盘的中心围绕垂直方向获得轮廓。随后，通过阈值技术确定垂直轮廓上的杯面积的边缘。最后，计算垂直杯形比率。使用七十九次图像，包括二十五个青光眼图像，通过这种方法实现了80％的敏感性和85％的特异性。

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