Table 1. Instructions provided to experienced graders for classifying the images of the dataset.

GRADE	DESCRIPTION
0	Cannot distinguish any cones/rods throughout the entire image
1	The cones/rods are only countable in only a small section/portion of the image and the rest of the image is not countable
2	The cones/rods are easily countable in certain areas of the image but on average the image is not easily countable
3	The cones/rods are easily countable in over half of the image and mostly countable in the other half of the image
4	The cones/rods for the most part are easily identifiable and countable for the entire image
5	The cones/rods can be easily identified and counted throughout the entire image