서지주요정보
모양정보 압축을 위한 다각형 근사화 및 응용 = Polygonal approximation for shape information reduction and its applications
서명 / 저자 모양정보 압축을 위한 다각형 근사화 및 응용 = Polygonal approximation for shape information reduction and its applications / 정재원.
저자명 정재원 ; Chung, Jae-Won
발행사항 [대전 : 한국과학기술원, 1998].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8008396

소장위치/청구기호

학술문화관(문화관) 보존서고

DEE 98004

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초록정보

This thesis presents a shape-adaptive vertex-based binary shape coding scheme which achieves a high coding efficiency. First, a new vertex selection method is proposed for reducing reconstruction errors and bit rates. Three new techniques - vertex adjustment, one-dimensional vertex selection and vertex reordering - are applied after the conventional iterated refinement method. The vertex adjustment method reduces the reconstruction error significantly, while the one-dimensional vertex selection and the vertex reordering method reduce bit-rates when encoding the vertex position. Second, efficient vertex position encoding methods are proposed. A cumulative segment-based coding method is proposed for encoding initial vertices. And coding method for one-dimensional vertex is also proposed. Furthermore, a conditional differential chain coding is presented for efficient lossless coding of contours. It uses the conditional probability of directional symbols depending on the context of preceding contour directions. Lastly, the shape-adaptive vertex-based binary shape coding scheme including all techniques proposed in this thesis is presented. The vertex adjustment reduces the reconstruction errors in various contour types, whereas the performances of other proposed techniques for efficient vertex encoding depend on the characteristics of contour. Experimental results show that the shape-adaptive vertex-based coding scheme reduces coded bits not only by 15~30% compared with the conventional vertex-based coding composed of the iterated refinement method and the object-adaptive vertex encoding, but also up to 15% compared with the context-based arithmetic encoding(CAE) of MPEG-4 Video VM(Verification Model) in intra-coded picture coding.

서지기타정보

서지기타정보
청구기호 {DEE 98004
형태사항 x, 117 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Jae-Won Chung
지도교수의 한글표기 : 김재균
지도교수의 영문표기 : Jae-Kyoon Kim
학위논문 학위논문(박사) - 한국과학기술원 : 전기및전자공학과,
서지주기 참고문헌 : p. 111-117
주제 MPEG-4
모양정보
다각형 근사화
정점
MPEG-4
Shape information
Polygonal approximation
Vertex
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