[an error occurred while processing this directive] Global Geology 2018, 21(2) 108-113 DOI:   10.3969/j.issn.1673-9736.2018.02.03  ISSN: 1673-9736 CN: 22-1371/P
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edge detection
improved 3D structure tensor
gravity anomaly
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DAI Weiming
LI Tonglin
HUANG Danian
YUAN Yuan
LIU Kai
QIAO Zhongkun
PubMed
Article by Dai W
Article by Li T
Article by Huang D
Article by Yuan Y
Article by Liu K
Article by Qiao Z
Edge detection of gravity anomaly with an improved 3D structure tensor
DAI Weiming1, LI Tonglin1, HUANG Danian1, YUAN Yuan2, LIU Kai3, QIAO Zhongkun1
1. College of Geo-Exploration Science and Technology, Jilin University, Changchun 130026, China;
2. Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;
3. China Water Northeastern Investigation, Design & Research Co., Ltd, Changchun 130062, China
ժҪ�� Edge detection plays an important role in geological interpretation of potential field data,which can indicate the subsurface faults,contact,and other tectonic features.A variety of methods have been proposed to detect and enhance the edges.3D structure tensor can well delineate the edges of geological bodies,however,it is sensitive to noise and additional false edges need to be removed artificially.In order to overcome these disadvantages,this paper redefines the 3D structure tensor with a Gaussian envelop and proposes a new normalized edge detector,which can remove the additional false edges and reduce the influence of noise effectively,and balance the edges of different amplitude anomalies completely.This method has been tested on the synthetic and measured gravity data,showing that the new improved method achievesbetter results and reveals more details.
�ؼ����� edge detection   improved 3D structure tensor   gravity anomaly  
Edge detection of gravity anomaly with an improved 3D structure tensor
DAI Weiming1, LI Tonglin1, HUANG Danian1, YUAN Yuan2, LIU Kai3, QIAO Zhongkun1
1. College of Geo-Exploration Science and Technology, Jilin University, Changchun 130026, China;
2. Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;
3. China Water Northeastern Investigation, Design & Research Co., Ltd, Changchun 130062, China
Abstract: Edge detection plays an important role in geological interpretation of potential field data,which can indicate the subsurface faults,contact,and other tectonic features.A variety of methods have been proposed to detect and enhance the edges.3D structure tensor can well delineate the edges of geological bodies,however,it is sensitive to noise and additional false edges need to be removed artificially.In order to overcome these disadvantages,this paper redefines the 3D structure tensor with a Gaussian envelop and proposes a new normalized edge detector,which can remove the additional false edges and reduce the influence of noise effectively,and balance the edges of different amplitude anomalies completely.This method has been tested on the synthetic and measured gravity data,showing that the new improved method achievesbetter results and reveals more details.
Keywords: edge detection   improved 3D structure tensor   gravity anomaly  
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DOI: 10.3969/j.issn.1673-9736.2018.02.03
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Supported by Project of National Major Science and Technology (No.2016ZX05026-007-01).

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1��TAN Xiaodi, ZHANG Dailei, MA Guoqing.Edge detection of potential field data based on image processing methods[J]. Global Geology, 2018,21(2): 134-142
2��LI Lu, ZHANG Shuang.Combined analysis of gravity and magnetic anomalies using normalized source strength[J]. Global Geology, 2018,21(2): 127-133
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