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중복비트 제거를 이용한 SPIHT 알고리즘의 개선에 관한 연구
설경호,이원효,주동현,김태형,김두영 동아대학교 정보기술연구소 2003 情報技術硏究所論文誌 Vol.11 No.1
This paper presents improvement of compression rate for SPIHT algorithm through redundancy bit removing. Proposed SPIHT algorithm uses a method to select of optimized threshold from feature of wavelet transform coefficients and removes sign bit only if coefficient is LL area. Experimental results show that the proposed algorithm achieves more improvement bit rate and more fast progressive transmission with low bit rate.
윤곽선 정보와 watershed segmentation을 이용한 영역 추출
이원효,설경호,염동훈,고기영,김두영 동아대학교 정보기술연구소 2003 情報技術硏究所論文誌 Vol.11 No.1
This paper proposed a extracting method of the region for image using segmentation and edge information. First proposed algorithm extract information using canny edge detector and the image was divided by watershed segmentation. And it extract the image with edge information by merging region. Finally we compare the proposed method with levelset method. In the result proposed method not only extract the image with accurate region but also reduce operation time.