Shallow Profile Data Extract Processing Key Technology Research

Shallow profile detection technology is a kind of acoustic detection technology to get submarine shallow bottom structure information.It is widely used in the survey of the ocean resources,construction of ocean engineering,marine geology study,etc.Because of its high efficiency,high resolution and the characteristic of penetrating the seabed,shallow profile detection technology has become indispensable in marine science and technology.But the current research on shallow profile data processing is not yet mature.During the measurement,noise and multiple affect seriously the quality of the Shallow profile images,so that the follow-up recognition and interpretation about the image elements is affected.The current recognition and interpretation is realized mainly artificially with low degree of automation.Therefore,this paper carried out a research on shallow profile data purification to realize automatic extraction of shallow profile boundary layer on the basis of improving the quality of shallow profile image.In this paper,the main work and contributions are as follows:(1)Do the research of the shallow profile image data pretreatment,including the original image decoding,image generation and anomaly detection,etc.First analyze and decode the shallow profile original SEG Y,extract shallow profile echo signal and generate a shallow vertical section gray image,and then detect the abnormal data of gray image and repair missing Ping data in the image.(2)Study how to eliminate the image noise.The application of sliding mean filter and improved median filtering method to conventional image noise(Gaussian noise and impulse noise,etc.)makes the image signal to noise ratio improved.(3)Study multiples attenuation.The traditional predictive deconvolution method has many limitations,so the improved multiples attenuation is proposed.(4)Do the research on shallow profile layer boundary automatic extraction based on edge detection algorithm,edge detection algorithm combined with expansion corrosion algorithm realizing layer automatic extraction and recognition.(5)On the basis of the above research,develop the shallow profile data processing software.Carry out the requirements analysis,design the software architecture,project management,line management,data processing and display module,form the shallow profile data processing software.(6)Test the proposed methods and the software by the shallow profile data of Shenzhen west coast,obtaining automated process,extracting clear shallow profile layer boundary.