Table 3.
Experimental results of image processing model (using Blob and ORB detectors in detecting the target point for needle insertion) on 2 mm hair length skin phantom. (Point values are shown in pixel unit).
| Hair graft and target point selection (BLOB&ORB result): Short haircut 1.5–2 mm range | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| No. | Measured Point |
Exact Point |
Error |
Precision (TP/ (TP+FP)) |
|||||||
| x axis | y axis | x axis | y axis | Euclidian distance | x axis | y axis | Euclidean Distance | %Eu_error | TP (%er<2) | Count (TP) | |
| 1 | 184.8000031 | 95.70000458 | 184.496 | 97.4431 | 208.6478654 | 0.304003 | -1.74309542 | 1.769406538 | 0.848034814 | TRUE | 1 |
| 2 | 166.3750153 | 114.4660111 | 162.688 | 113.987 | 198.6464737 | 3.687015 | 0.47901105 | 3.718001226 | 1.871667368 | TRUE | 1 |
| 3 | 169.4000092 | 117.3700028 | 169.456 | 118.5 | 206.7790752 | -0.05599 | -1.12999725 | 1.13138356 | 0.547146059 | TRUE | 1 |
| 4 | 214.5732727 | 122.6132965 | 220.593 | 100.451 | 242.3874482 | -6.01973 | 22.16229651 | 22.9652891 | 9.474619773 | FALSE | 0 |
| 5 | 181 | 120 | 172.464 | 117.748 | 208.8262982 | 8.536 | 2.252 | 8.828068872 | 4.227469887 | FALSE | 0 |
| 6 | 166 | 108 | 165.696 | 108.723 | 198.1813693 | 0.304 | -0.723 | 0.7843118 | 0.395754557 | TRUE | 1 |
| 7 | 201.3000031 | 106.7000046 | 201.04 | 107.219 | 227.8442353 | 0.260003 | -0.51899542 | 0.58048069 | 0.254770848 | TRUE | 1 |
| 8 | 154.3384247 | 115.7538223 | 163.44 | 94.4351 | 188.7607526 | -9.10158 | 21.31872233 | 23.18030619 | 12.28025735 | FALSE | 0 |
| 9 | 203.640976 | 126.4717636 | 202.544 | 107.219 | 229.1723934 | 1.096976 | 19.25276361 | 19.28398981 | 8.414621639 | FALSE | 0 |
| 10 | 183 | 84 | 182.992 | 83.9069 | 201.3117978 | 0.008 | 0.0931 | 0.093443084 | 0.046417093 | TRUE | 1 |
| 11 | 171.6000061 | 96.80000305 | 171.712 | 97.4431 | 197.4339603 | -0.11199 | -0.64309695 | 0.652775858 | 0.330629977 | TRUE | 1 |
| 12 | 161.0510101 | 106.480011 | 161.183 | 107.219 | 193.5868628 | -0.13199 | -0.73898901 | 0.750683743 | 0.387776181 | TRUE | 1 |
| 13 | 204.6000061 | 116.6000061 | 204.048 | 117.748 | 235.5847572 | 0.552006 | -1.1479939 | 1.273813459 | 0.540702834 | TRUE | 1 |
| 14 | 177.1000061 | 111.1000061 | 174.72 | 110.979 | 206.9865137 | 2.380006 | 0.1210061 | 2.383080257 | 1.151321511 | TRUE | 1 |
| 15 | 159.5 | 93.5 | 158.927 | 94.4351 | 184.8669236 | 0.573 | -0.9351 | 1.096695496 | 0.593235109 | TRUE | 1 |
| 16 | 156.199997 | 118.8000031 | 155.919 | 117.748 | 195.3850712 | 0.280997 | 1.05200305 | 1.088884614 | 0.557301849 | TRUE | 1 |
| 17 | 198.3190155 | 106.480011 | 197.28 | 107.971 | 224.8936087 | 1.039016 | -1.49098901 | 1.817306093 | 0.808073695 | TRUE | 1 |
| 18 | 160 | 107 | 158.927 | 107.971 | 192.1341411 | 1.073 | -0.971 | 1.447124735 | 0.753184586 | TRUE | 1 |
| 19 | 200 | 131 | 198.784 | 132.78 | 239.0514737 | 1.216 | -1.78 | 2.155703134 | 0.901773622 | TRUE | 1 |
| 20 | 169.4000092 | 112.2000046 | 168.704 | 111.731 | 202.348353 | 0.696009 | 0.46900458 | 0.839281864 | 0.414770791 | TRUE | 1 |
| 21 | 176.6600037 | 87.12000275 | 174.72 | 86.9149 | 195.1442498 | 1.940004 | 0.20510275 | 1.950815557 | 0.999678729 | TRUE | 1 |
| 22 | 174.9000092 | 94.59999847 | 173.968 | 95.1871 | 198.3064523 | 0.932009 | -0.58710153 | 1.10151227 | 0.555459622 | TRUE | 1 |
| 23 | 203.2799988 | 90.75 | 195.776 | 89.923 | 215.4399872 | 7.503999 | 0.827 | 7.54943221 | 3.504192655 | FALSE | 0 |
| 24 | 161.699997 | 95.70000458 | 161.935 | 94.4351 | 187.4591484 | -0.235 | 1.26490458 | 1.286549661 | 0.686309349 | TRUE | 1 |
| 25 | 165.8825531 | 119.1777573 | 165.696 | 119.252 | 204.1475053 | 0.186553 | -0.07424274 | 0.200783574 | 0.098352206 | TRUE | 1 |
| 26 | 202 | 93 | 194.272 | 92.179 | 215.0315745 | 7.728 | 0.821 | 7.771487953 | 3.614114798 | FALSE | 0 |
| 27 | 186 | 121 | 185.248 | 122.26 | 221.9556918 | 0.752 | -1.26 | 1.467345903 | 0.66109857 | TRUE | 1 |
| 28 | 170.3680115 | 105.1490097 | 170.96 | 106.467 | 201.4014491 | -0.59199 | -1.3179903 | 1.444835233 | 0.717390684 | TRUE | 1 |
| 29 | 182.7100067 | 100.4300003 | 176.224 | 98.9472 | 202.1025645 | 6.486007 | 1.48280031 | 6.653343505 | 3.292062881 | FALSE | 0 |
| 30 | 211.2000122 | 119.9000015 | 210.065 | 120.004 | 241.9261545 | 1.135012 | -0.10399847 | 1.139766818 | 0.471121785 | TRUE | 1 |