Fig 6. ROC curve of the CNN models to differentiate between the normal disc and glaucomatous disc.

The TVGH ROC curve indicated the result through the TVGH-CNN model established based on the TVGH training images to predict the TVGH test images. The Drishti ROC curve indicated the result through the CNN model established using the Drishti-GS training images to predict the Drishti-GS test images. *TVGH and *Drishti used the combined TVGH and Drishti training dataset to predict the TVGH and Drishti test images, respectively. ROC, receiver operating characteristic; CNN: convolutional neural network.