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Table 4 Comparison of detected segments with the ground truth for the ten test images

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

    NS c  
    PPHT LSD HT3D
   dS 4 3 2 4 3 2 4 3 2
  NS g           
1 42   5 4 3 18 12 4 24 21 9
2 120   21 17 11 64 47 17 75 61 45
3 111   23 13 5 59 43 19 59 47 32
4 628   92 56 20 272 174 61 291 236 124
5 306   58 34 17 120 65 23 124 82 37
6 434   57 34 12 174 112 32 194 158 89
7 373   54 27 9 154 101 46 155 121 73
8 350   70 44 13 159 105 42 155 113 61
9 139   14 11 5 45 30 18 60 50 29
10 209   70 54 36 136 112 45 159 145 92
  1. The number of correct matchings of each method (NS c ) is shown considering different values of the distance between ground truth and detected segments (dS). The total number of ground truth segments (NS g ) is shown in the first column