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

机译:自动测量视网膜眼底图像的垂直杯碟比

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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:青光眼是永久性失明的主要原因。视网膜眼底图像检查有助于早期发现青光眼。为了评估青光眼的存在,眼科医生可以确定杯和椎间盘的面积,并使用垂直的杯碟比来诊断青光眼。但是,确定杯子的面积非常困难,因此,我们提出了一种使用光盘上的垂直轮廓来测量杯子与光盘比例的方法。然后通过使用Canny边缘检测滤光片检测光盘的边缘。然后在垂直方向上围绕光盘中心获得轮廓。随后,通过阈值技术确定杯状区域在垂直轮廓上的边缘。最后,计算出垂直的杯碟比。使用79幅图像,包括25幅青光眼图像,通过这种方法可以达到80%的敏感性和85%的特异性。

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