EURASIP Journal on Image and Video Processing

Table 3 Number of detected segments (NS _d) and percentage of connected segments (CS) for the ten test images

From: A variant of the Hough Transform for the combined detection of corners, segments, and polylines

	PPHT		LSD		HT3D
	NS _d	CS(%)	NS _d	CS(%)	NS _d	CS(%)
1	352	0	329	21	263	67
2	434	0	515	13	335	74
3	1847	0	751	17	912	69
4	2376	0	1274	15	1213	77
5	1655	0	838	13	907	63
6	2768	0	1034	20	1321	62
7	1079	0	1058	14	924	76
8	2622	0	1112	14	1269	62
9	1295	0	839	15	738	71
10	2194	0	1301	28	1355	77

The percentage of connected segments is indicative of the ability of a segment detector to provide chains of segments corresponding to the polygonal image contours. According to this measure, the proposed method (HT3D) produces clearly better results than the other two approaches

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