Table 2. Comparison of the performances between human experts and presented method (vessel width in pixels).

	18.24	4.82	14.57	4.53	13.37	3.66
	19.40	4.94	16.01	4.34	14.39	3.52
	18.41	4.81	14.75	4.20	13.78	3.69

and denote the two human experts. denotes the presented method. and are the mean and standard deviation of vessel width measurements.