Acta Photonica Sinica, Volume. 50, Issue 9, 0907001(2021)
A Denoising Method for LiDAR Bathymetry System via Multidimensional Temporal-spatial Analysis
Figures & Tables(12)
Fig. 1. Temporal-spatial correlation in multiple periods of echo signals
Fig. 3. Comparison on processing characteristic waveform by AGGF， Wavelet Filter， Wiener Filter and proposed method
Fig. 4. Results of processing continuous characteristic waveforms by basic denoising and final denoising
Fig. 6. Comparison on processing simulation waveform by AGGF， Wavelet Filter， Wiener Filter and proposed method
Fig. 7. Results of processing continuous simulation waveforms by basic denoising and final denoising
Fig. 8. Seafloor point cloud of waveform set denoised by different methods
Fig. 9. Comparison on processing measured waveform by AGGF， Wavelet Filter， Wiener Filter， and proposed method
Fig. 10. Results of processing continuous measured waveforms by basic denoising and final denoising
Table 1. MSE and PSNR values of different noise variance in simulated experiment
View tableView in ArticleTable 1. MSE and PSNR values of different noise variance in simulated experiment
Noise variance Evaluation Index Original AGGF Wavelet Wiener Proposed method 1.5 MSE 1.05×10-4 9.14×10-5 8.48×10-5 1.58×10-4 5.12 ×10-5 PSNR -1.278 7.858 4.805 5.476 9.205 2.5 MSE 1.95×10-4 1.01×10-4 1.18×10-4 1.72×10-4 5.16 ×10-5 PSNR -7.770 7.193 3.049 2.474 9.099 3.5 MSE 3.11×10-4 1.28×10-4 1.53×10-4 1.89×10-4 5.27 ×10-5 PSNR -11.587 6.950 2.259 2.174 8.767 4.5 MSE 4.55×10-4 1.33×10-4 1.91×10-4 2.07×10-4 5.30 ×10-5 PSNR -17.526 3.527 -1.954 -2.857 7.664
Table 2. SD and MAE values between depth extracted from denoised waveform set and true depth
View tableView in ArticleTable 2. SD and MAE values between depth extracted from denoised waveform set and true depth
Evaluation index Original AGGF Wavelet Wiener Proposed method SD/m 0.1010 0.0159 0.0232 0.0341 0.0082 MAE/m 1.1658 0.5862 0.8509 0.8844 0.5130
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Mao YE, Pinquan WANG, Yiqiang ZHAO, Rui CHEN, Bin HU, Guoqing ZHOU. A Denoising Method for LiDAR Bathymetry System via Multidimensional Temporal-spatial Analysis[J]. Acta Photonica Sinica, 2021, 50(9): 0907001
Paper Information
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Received: Feb. 9, 2021
Accepted: Apr. 14, 2021
Published Online: Oct. 22, 2021
The Author Email: ZHAO Yiqiang (yq_zhao@tju.edu.cn)
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