Segmentation of Online Freehand Sketching Based on Speed Feature

Table 1

Specific results of the example strokes drawn at different speeds.

Shape	Speed feature		Algorithm						Precision (%)
8	Uniform speeds	14	The method in [2]	208.833	187.950	—	14	43	32.558
			Proposed method	208.823	92.518	385.072	14	14	100
	Nonuniform speeds		The method in [2]	98.975	89.078	—	14	138	10.145
			Proposed method	−1.726	−76.951	79.358	14	14	100
9	Uniform speeds	5	The method in [2]	309.687	278.718	—	5	18	27.778
			Proposed method	309.393	124.520	556.437	5	5	100
	Nonuniform speeds		The method in [2]	91.188	82.069	—	5	124	4.032
			Proposed method	1.733	−69.218	99.361	5	7	71.429

 = average speed;  = low-speed threshold; = high-speed threshold;  = the number of all accepted true segmentation points;  = the number of true segmentation points;  = the number of accepted true segmentation points.