A Novel Horizon Picking Method on Sub-Bottom Profiler Sonar Images
Abstract
:1. Introduction
2. Method
2.1. Building Fine SBP Images
2.2. Characteristics of SBP Sediment Interface
- A sediment interface has lateral continuity; therefore, the pixels with high gray level representing interfaces in adjacent pings are continuous along lateral directions. Then the sediment interfaces can be approximated as line-like structures [14].
- Adjacent pings have different attitudes, incident energy, and signal–noise ratio (SNR); therefore the intensity imbalance often occurs along pings in SBP images.
2.3. Filtering Line-Like Sructures
- If both λ1 and λ2 are small, the analyzed region has approximately constant intensities.
- If one eigenvalue is high and the other low, there are small gray level changes in one direction and significant changes in the orthogonal direction, which indicates that there is a line-like structure.
- If both λ1 and λ2 are high, their gray level changes in both directions, which indicates the presence of a corner.
2.4. Suppression of Vertical Structures
2.4.1. The Verticality Descriptor
2.4.2. Definitions of the Key Points
2.4.3. Determination of the Final Vertical Suppression Model
2.5. Horizon Picking and Linking
3. Experiment and Analysis
3.1. Horizon Picking on EdgeTech 3100P Data in Shenzhen
3.2. Horizon Picking on C-boom Data in Shenzhen
3.3. Horizon Picking on C-boom Data in Bohai Bay
3.4. Horizon Picking on Parasound P70 Data in the South China Sea
4. Results
5. Discussion
5.1. Scale Parameter
5.2. Vertical Exaggeration
5.3. S and RB in the Multi-Scale Filter
5.4. Comparison with the Method Using Local Phase
5.5. Applicability of the Proposed Method
6. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
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Precision | Recall | F-measure | Accuracy |
---|---|---|---|
0.86 | 0.85 | 0.85 | 0.99 |
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Li, S.; Zhao, J.; Zhang, H.; Bi, Z.; Qu, S. A Novel Horizon Picking Method on Sub-Bottom Profiler Sonar Images. Remote Sens. 2020, 12, 3322. https://doi.org/10.3390/rs12203322
Li S, Zhao J, Zhang H, Bi Z, Qu S. A Novel Horizon Picking Method on Sub-Bottom Profiler Sonar Images. Remote Sensing. 2020; 12(20):3322. https://doi.org/10.3390/rs12203322
Chicago/Turabian StyleLi, Shaobo, Jianhu Zhao, Hongmei Zhang, Zijun Bi, and SiHeng Qu. 2020. "A Novel Horizon Picking Method on Sub-Bottom Profiler Sonar Images" Remote Sensing 12, no. 20: 3322. https://doi.org/10.3390/rs12203322