Table 1.

Roundness values and the critical points found in the GVF fields.

Segment no	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15
Roundness	0.654	0.761	0.16	0.352	0.26	0.26	0.911	0.785	0.877	0.771	0.357	0.748	0.208	0.749	0.907
Critical point		√					√	√	√	√				√	√

Tick denotes the critical point was found, the single objects are bold, segment 12 is an oversegment because there is no critical point inside its GVF fields