Comparison of performance between the result of our edge detection method and ground truth data points from the REVIEW database.

In this Table, successful measurement percentages is labeled by , mean vessel widths is labeled by , and standard deviation of the measurement error is labeled . The vessel width measurements obtained using the edges produced by our method are compared against the measurements carried out by the human observers and methods in literature. These literature methods include: that of Gregson et al.[48], Graph et al. based method [49], 1D Gaussian (1DG) [22] and 2D Gaussian (2DG) [50]. The results listed in the table above the double line use the datasets from the REVIEW database, named as: HRIS001, CLRIS002, VDIS006, KPIS001. The results listed in the table below the double line are averaged results according to the whole REVIEW database, which lead to slightly different representation of results, but these results can be referred for comparison.