Sung-Jin Song

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Among various kinds of image denoising methods, the Perona–Malik model is a representative Partial Differential Equation based (PDE-based) algorithm which effectively removes the noise as well as having edge enhancement simultaneously through anisotropic diffusion controlled by the diffusion coefficient. However, the unstable behavior of the Perona–Malik(More)
Inspection of unpiggable pipeline becomes one of major issues in the gas pipelines industry. Remote field eddy current testing (RFECT) has strong potential for inspecting unpiggable pipelines among the various NDE methods. Thus, in this study, design of RFECT system including driving coil, sensing coil and passive scanning module and intial experimental(More)
Austenitic stainless steel is widely used in nuclear industry due to its high corrosive resistance and excellent creep properties over a range of temperature. However, inspection of austenitic material weldments using phased array ultrasound is not easy at all, because crystalline structure of austenitic stainless steel weldments cause deviation and(More)
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