A Hybrid Unsupervised Approach for Retinal Vessel Segmentation

Table 1

Datasets comparison.

Dataset	Image classification	Image size	Format
DRIVE	Total 40 images		JPEG
	20 test, 20 training
	7 abnormal, 33 normal
STARE	Total 20 images		PPM
	10 normal
	10 abnormal
HRF	Total 45 images		JPEG
	15 normal, 15 DR
	15 glaucomatous
CHASE_DBI	Total 28 images		JPEG
	14 left eye
	14 right eye