Li Hongxing1, Rao Shuo2, Tao Chunhui3, Zhou Jianping3, Zhang Hua1
1. School of Nuclear Engineering and (GHT) Geophysics, East China University of Technology, Nanchang, Jiangxi 330013, China;
2. School of Geophysics, Chengdu University of Technology, Chengdu, Sichuan 610059, China;
3. Second Institute of Oceanography, State Oceanic Administration, Hangzhou, Zhejiang 310012, China
Abstract：Conventional edge detection methods have low resolution and serious noise influence. Therefore we propose a new edge detection approach by introducing 2-D edge-preserved smoothing and generalized Hilbert transform (GHT) edge prediction. First edge-preserved smoothing processing is carried out. And then optimized windowed Fourier transform is conducted. Finally imaginary part absolute values of the transform are used to detect edges along 1/N power of the frequency sum of the windowed Fourier transform. This approach is applied to effectively predict the distribution of structural fracture and Karst pores and caves. Model and real data test results show that the proposed edge detection approach has not only strong noise-suppressed capacity but also high precision.
Li Hongxing, Liu Cai, Tao Chunhui. The study of application of edge measuring technique to the detection of phase axis of the seismic setion. Progress in Geophysics, 2007, 22(5): 1607-1610.
[4]
Bahorich M, Farmer S. 3-D seismic discontinuity for faults and stratigraphic features the coherence cube. The Leading Edge, 1995, 14(10): 1053-1058.
Gao Jinghuai, Wang Wenbing, Zhu Guangming. Wavelet transform and instantaneous attributes analysis. Chinese Journal of Geophysics, 1997, 40(6): 421-432.
[6]
Klaus K. Corner detection in natural images based on the 2-D Hilbert transform. Signal Processing, 1996, 48(3): 225-234.
[7]
Wietzke L, Fleischmann O, Sommer G. 2.
Image Analysis by Generalized Hilbert Transforms in Conformal Space. Lecture Notes in Computer Science, 2008, 5303, 638-649.
He Jianjun, He Zhenhua, Huang Deji. Detection and interpretation of fracture sets in tight sandstone reservoir. Journal of Chengdu University of Technology, 2004, 31(6): 713-716.
Chen Xuehua, He Zhenhua, Huang Deji. Seismic data edge detection based on higher-order pseudo Hilbert transform. Progress in Geophysics, 2008, 23(4): 1106-1110.
[12]
Luo Yi, Marhoon M. Generalized Hilbert transform and its applications. The Leading Edge,2003, 22(3): 198-202.
[13]
Luo Yi, Marhoon M. Edge presercing smoothing and applications. The Leading Edge, 2002, 21(2): 136-141.
Wang Jingbo, Wang Shangxu, Yuan Sanyi et al. Seismic data edge detection using multichannel local complex-valued correlation. OGP, 2014, 49(1): 190-196.
