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하진일,박수형,주동현,염동훈,김두영 동아대학교 정보기술연구소 2002 情報技術硏究所論文誌 Vol.10 No.1
Recently develpoing of the internet technology and spreading of the variable digital media are caused the problems. They are to protect the copy and to preserve the copyright. It is that the resolution is digital watermark. This paper is research about digital watermark that is to strengthend by PN encoding after Wavelet transform.
라벨링과 레벨세트 이론을 이용한 양방향 곡선 전개 형태 추출
박수형,하진일,주동현,염동훈,김두영 동아대학교 정보기술연구소 2002 情報技術硏究所論文誌 Vol.9 No.2
In this paper, We propose the method of initial curve creation in levelset evolution for the edge of objects or the shape extractions. The shape of traditional initial curve is including edge. But we improve the speed of processing to draw many initial curve using special parameter which was solved by binary processing and sequence labeling. In particular, it is necessary to efficiently reduce noise, we use anisotropic diffusion filter. This filter is to reduce blurring that is the fault of traditional filter processing and to preserver an accurate edge part. The levelset method using inward and outward evolution extracts the edge of object drawn initial curve, it performs to calculate shrinking and expanding at the same time.