During the acquisition of ground penetrating radar (GPR) data, noise would inevitably be mixed in by the influence of external factors, which seriously interferes with the identification and interpretation of effective echo. Therefore, the authors used the bilateral filtering algorithm to remove noise from ground penetrating radar data. By adding White Gaussian Noise to the forward record of ground penetrating radar to simulate the measured ground penetrating radar record, the synthetic record containing noise was filtered by bilateral filter. The results show that the bilateral filtering algorithm can remove most of the White Gaussian Noise, highlight the effective echo information and increase the peak signal-to-noise ratio (PSNR) from 15.845 1 to 22.147 7. Furthermore, the bilateral filter was used to filter the measured records. The filtered results show that the noise removal effect is better, which indicates that the bilateral filter could be effectively applied to the denoise of ground penetrating radar data.
Si-Wei ZHANG,Rong-Xin WU,Zi-Ao HAN, et al. The application of bilateral filtering to denoise processing of ground penetrating radar data[J]. Geophysical and Geochemical Exploration,
2021, 45(2): 496-501.
Synthetic records of ground penetrating radar with different signal-to-noise ratio a—a synthetic record with a signal-to-noise ratio of 2; b—a synthetic record with a signal-to-noise ratio of 10
The result of bilateral filtering of the GPR in figure 2a a—bilateral filtered profile;b—the residual profile
The result of bilateral filtering of the GPR in figure 2b a—bilateral filtered profile;b—the residual profile
高斯白噪声 信噪比
含噪图像 信噪比
滤波图像 信噪比
1
1.872 9
13.391 5
2
4.875 9
15.360 2
10
11.867 8
22.147 7
PSNR values of White Gaussian Noise images with different signal-to-noise ratio
Bilateral filtering effect of ground penetrating radar records measured by PVC tube a—the original profile;b—the bilateral filtered profile;c—the residual profile
Bilateral filtering effect of pipeline ground penetrating radar record a—the original profile;b—the bilateral filtered profile;c—the residual profile
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