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Table 1: Precision and recall for different radii on two images: one pixel corresponds to 0.01 millimeter.

First image Second image Radius (pixels) Recall Precision Radius (pixels) Recall Precision Radius (pixels) Recall Precision Radius (pixels) Recall Precision 7 0.25 1.00 17–19 1.00 0.90 7 0.44 0.80 16 0.57 1.00 8 0.50 1.00 20 0.75 1.00 8 0.50 1.00 17 0.77 1.00 9 0.57 1.00 21 0.60 0.60 9 0.40 1.00 18 0.57 1.00 11 1.00 0.67 22 0.60 1.00 11 0.25 1.00 19 0.50 1.00 13 0.67 1.00 23 0.67 1.00 12 0.25 1.00 20 0.50 0.60 14 0.80 1.00 24 0.33 1.00 13 0.25 0.50 22 0.25 0.33 15 0.67 1.00 25-26 1.00 0.75 14 0.57 0.57 23 0.75 1.00 16 0.75 0.75 28–44 1.00 1.00 15 0.57 1.00 24–44 1.00 1.00