Utilizing Transfer Learning and a Customized Loss Function for Optic Disc Segmentation from Retinal Images
This work addresses accurate segmentation for diagnosing retinal conditions like glaucoma, but it is incremental as it builds on existing methods with customizations.
The paper tackled optic disc segmentation from retinal images using a UNET-based model with a VGG16 encoder and a customized loss function, achieving 99.78% accuracy and a Dice coefficient of 94.73% in 0.03 seconds.
Accurate segmentation of the optic disc from a retinal image is vital to extracting retinal features that may be highly correlated with retinal conditions such as glaucoma. In this paper, we propose a deep-learning based approach capable of segmenting the optic disc given a high-precision retinal fundus image. Our approach utilizes a UNET-based model with a VGG16 encoder trained on the ImageNet dataset. This study can be distinguished from other studies in the customization made for the VGG16 model, the diversity of the datasets adopted, the duration of disc segmentation, the loss function utilized, and the number of parameters required to train our model. Our approach was tested on seven publicly available datasets augmented by a dataset from a private clinic that was annotated by two Doctors of Optometry through a web portal built for this purpose. We achieved an accuracy of 99.78\% and a Dice coefficient of 94.73\% for a disc segmentation from a retinal image in 0.03 seconds. The results obtained from comprehensive experiments demonstrate the robustness of our approach to disc segmentation of retinal images obtained from different sources.