116
4 Image Theory of RFID System Physical Anti-Collision
(a) SURF matching results
(b) Matching results in this paper
Fig. 4.7 Image matching result of round RFID tag
Table 4.1 Image test results of square RFID tags
Figure Time/s Feature points Number of matches Matching rate/%
SURF
3
2.032
82
32
39.0
4
1.967
48
33
68.7
5
1.962
96
23
23.9
Improved SURF 3
0.882
93
81
87.1
4
0.884
105
100
95.2
5
0.931
98
92
93.8
Table 4.2 Image test results of rectangular RFID tags
Figure Time/s Feature points Number of matches Matching rate/%
SURF
6
2.082
52
3
5.76
7
2.359
95
42
44.2
Improved SURF 6
0.674
85
63
74.1
7
1.211
121
105
86.7