Inverse Synthetic Aperture Radar Sparse Imaging Exploiting the Group Dictionary Learning
Abstract
:1. Introduction
2. Imaging Model
2.1. Model of ISAR Measurements
2.2. Sparse Imaging Model
3. DL-Based Sparse Imaging
3.1. Off-Line DL Based Sparse Imaging
3.2. On-Line DL-Based Sparse Imaging
4. GDL-Based Sparse Imaging
4.1. Construction of Image Patch Group
4.2. ISAR Image Patch Group Based Imaging Model
4.3. Group Dictionary Learning Based Sparse Imaging
4.4. Group Dictionary Learning
4.5. Group Sparse Representation and Target Image Reconstruction
5. Experimental Results
5.1. Imaging Data and Parameters
5.2. Image Quality Evaluation
5.3. Imaging Results of Real Data
5.4. Quantitative Evaluation of Image Quality
5.5. Discussion on the Parameter Setting
6. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
Appendix A
Appendix B
References
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Data | S_r_data | S_ratios (Measurements) | Sparsity |
---|---|---|---|
Plane data | 100 × 80 | 25% (2000), 50% (4000) | 900 |
Ship data | 96 × 96 | 50% (4608) | 841 |
Data | P_size | P_step | l | |||
---|---|---|---|---|---|---|
Plane data 1 | 64 | 2 | 16 × 16 | 64 | 17 | 0.02 |
Plane data 2 | 64 | 2 | 16 × 16 | 64 | 17 | 0.03 |
Ship data 1 | 64 | 2 | 16 × 16 | 64 | 17 | 0.035 |
Methods | FA | MD | TCR(dB) | ENT | IC | Time(s) | |
---|---|---|---|---|---|---|---|
GKF | 144 | 209 | 50.0179 | 5.3205 | 8.0850 | 1.3408 × 10 | |
Plane | ONDL | 170 | 173 | 48.6525 | 5.4674 | 7.7229 | 8.2370 |
data 1 | OFDL | 173 | 130 | 48.9775 | 5.5550 | 7.5045 | 5.9370 |
GDL | 70 | 102 | 57.1222 | 5.0482 | 9.5376 | 3.3620 | |
GKF | 86 | 133 | 55.5930 | 5.3800 | 8.1449 | 1.221 × 10 | |
Plane | ONDL | 45 | 187 | 53.4593 | 5.3152 | 8.4299 | 7.2510 |
data 2 | OFDL | 55 | 125 | 59.9737 | 5.3395 | 8.3847 | 5.8510 |
GDL | 52 | 104 | 60.3972 | 5.2580 | 8.7278 | 3.3620 | |
GKF | 88 | 132 | 56.3161 | 5.6036 | 7.5965 | 1.3301 × 10 | |
Ship | ONDL | 155 | 126 | 53.6296 | 5.6388 | 7.3239 | 6.3620 |
data 1 | OFDL | 148 | 154 | 52.5180 | 5.7109 | 7.3772 | 4.3620 |
GDL | 20 | 55 | 68.4828 | 5.1813 | 9.1454 | 4.1526 |
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Hu, C.; Wang, L.; Zhu, D.; Loffeld, O. Inverse Synthetic Aperture Radar Sparse Imaging Exploiting the Group Dictionary Learning. Remote Sens. 2021, 13, 2812. https://doi.org/10.3390/rs13142812
Hu C, Wang L, Zhu D, Loffeld O. Inverse Synthetic Aperture Radar Sparse Imaging Exploiting the Group Dictionary Learning. Remote Sensing. 2021; 13(14):2812. https://doi.org/10.3390/rs13142812
Chicago/Turabian StyleHu, Changyu, Ling Wang, Daiyin Zhu, and Otmar Loffeld. 2021. "Inverse Synthetic Aperture Radar Sparse Imaging Exploiting the Group Dictionary Learning" Remote Sensing 13, no. 14: 2812. https://doi.org/10.3390/rs13142812