Research And Implementation Of Seismic Image Boundary Tracking And Extraction Algorithm

In recent years, graphics and image processing technology has received extensiveattention in most areas, and has made outstanding research achievements. Edge is a collectionof points with obvious changes in image brightness, and the edges are full of wealth ofinformation in the image. Therefore, the boundary information extraction has become thefocus and hot issue of the study in various fields. Significantly changes of image boundarydirectly pass some important information, these changes include: discontinuous depth ofimage, discontinuous surface orientation, changes in material properties and scene lightingchanges. Because of the importance of boundary information, it results the accuracy of theboundary information and access to efficiency demand increasingly high in the practicalapplication, therefore, it designs an combining method of automatic detection and interactiveextraction to implement the high precision and high efficiency border extraction.At present there are a lot of algorithms and methods in the edge detection and graphicediting field, and generally the image practically processed exists noise points even publicpoints among many targets. The seismic image studied in this paper has these characteristics:fracture regions are existed and the points in these areas are actually not; fault polygonsextraction need to keep format characteristics. Therefore, how to ensure the accuracy andkeep the original attribute information of the edge position at the edges has becomedifficulties in boundary extraction. And the common boundary extraction method is hard toadapt to the actual application needs, so it is only to design a new method or improve theexisting method that can meet boundary extraction results. Aiming at the research for thesubject of fault polygon automatically extracting interaction system which is used in T0-graph,it requires to realize the accurate outline and efficient orientation of fault polygon in T0-graphwith complex fault distribution and strong noise interference, and smooth automatically andedit interactively for the polygons with larger zigzag. At last, output parameters sequence ofboundary points. In view of requirements of the actual project in this article, it designs a set ofboundary extraction algorithms and schemes, which has made an obvious effect.In this article, the traditional image edge detection method and application are firstanalyzed and researched, and compares the advantages and disadvantages of each edgedetection algorithm and applicable situation, and puts forward an boundary tracking algorithmbased on4-domain. Secondly, a kind of improved smoothing algorithm is researched to smooth the edge profile automatically. Last, designs a graphic storage structure suitable forfault polygon. For the flexibility of the designed structure, it improves the interactive editingperformance for the fault polygon. So it further improves the smoothing effect and makes it toachieve a high efficiency and non-distortion. Today, it has achieved good effect in the system.