Laser & Optoelectronics Progress, Volume. 58, Issue 2, 0210020(2021)
A Real-Time SIFT Algorithm for Planetary Surface Feature Extraction
Figures & Tables(10)
Fig. 5. Feature point matching results of four algorithms. (a) SIFT algorithm; (b) SiftGPU algorithm; (c) SURF algorithm; (d) FG-SIFT algorithm
Fig. 6. Time-consuming comparison of feature point extraction. (a) Time-consuming statistics; (b) algorithm speedup ratio
Fig. 7. Time-consuming comparison of building Gaussian pyramid. (a) Time-consuming statistics; (b) algorithm speedup ratio
Table 1. Shared memory layout in block
View tableTable 1. Shared memory layout in block
Bank0 Bank1 Bank2 Bank3 Bank4 … (0,0)→(0,7) (1,0)→(1,7) (2,0)→(2,7) (3,0)→(3,7) (4,0)→(4,7) … (0,8)→(0,15) (1,8)→(1,15) (2,8)→(2,15) (3,8)→(3,15) (4,8)→(4,15) … … … … … … …
Table 2. Error statistics of different σ values
View tableTable 2. Error statistics of different σ values
Number σ value Average error /% Maximum error /% 1 1.903 0.810 7.059 2 2.263 0.487 7.059 3 2.693 0.333 7.451 4 3.200 0.823 7.059 5 3.805 0.506 7.843 6 4.525 0.493 8.627
Table 3. Matching effect of four algorithms
View tableTable 3. Matching effect of four algorithms
Algorithm Image Group 1 Group 2 Group 3 Group 4 Real angle /(°) 4.27 8.82 14.60 24.00 Total matches 6938 6906 3344 830 Effective matches 6798 6536 2867 428 OpenCv_SIFT Matching accuracy /% 98.0 94.6 85.7 51.6 Calculated angle /(°) 4.34 9.03 14.31 24.31 Angel error /% 1.64 2.38 1.99 1.29 Total matches 6766 6408 3147 734 Effective matches 6601 6014 2715 379 SiftGPU Matching accuracy /% 97.6 93.9 86.3 51.6 Calculated angle /(°) 4.21 9.03 14.91 24.29 Angel error /% 1.41 2.38 2.12 1.21 Total matches 11844 12582 7608 1578 Effective matches 7644 5939 1902 161 SURF Matching accuracy /% 64.5 47.2 25.0 10.2 Calculated angle /(°) 4.54 7.50 10.44 27.61 Angel error /% 6.32 14.97 28.49 15.04 Total matches 6916 6326 2580 726 Effective matches 6481 5964 2180 379 FG-SIFT Matching accuracy /% 93.7 94.3 84.5 52.2 Calculated angle /(°) 4.36 8.59 14.26 24.70 Angel error /% 2.11 2.61 2.33 2.92
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Baoyan Shan, Zhencai Zhu, Yonghe Zhang, Chengbo Qiu. A Real-Time SIFT Algorithm for Planetary Surface Feature Extraction[J]. Laser & Optoelectronics Progress, 2021, 58(2): 0210020
Paper Information
Category: Image Processing
Received: Jun. 18, 2020
Accepted: Oct. 13, 2020
Published Online: Jan. 11, 2021
The Author Email: Zhencai Zhu (zczhu@hotmail.com)
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