서지주요정보
차분연산자를 이용한 점군데이터 페어링 = Point-set data fairing using difference operator
서명 / 저자 차분연산자를 이용한 점군데이터 페어링 = Point-set data fairing using difference operator / 조수경.
저자명 조수경 ; Cho, Su-Kyeong
발행사항 [대전 : 한국과학기술원, 2000].
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등록번호

8011468

소장위치/청구기호

학술문화관(문화관) 보존서고

DIE 00015

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도서상태

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등록번호

9007677

소장위치/청구기호

서울 학위논문 서가

DIE 00015 c. 2

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초록정보

A set of points with connectivity information is called point-set data. PS-curves(point-sequence curves), rectangular array data, and triangular net data are representative forms of point-set data. Fairing of point-set data is an essential step in processing laser-scanned data. Investigated in this thesis are various aspects of difference fairing methods for point-set data. First, EOD (even-order-difference) fairing of PS-curve is analyzed using a DFT (discrete Fourier-transform) filter. A DFT-filter corresponding to an EOD-fairing operation is derived, and then a method for determining “optimal" damping factor for EOD-fairing is proposed based on the concept of filtering measure. Validity of the“theoretical" damping factor is demonstrated by systematic fairing experiments. Difference fairing of array data is treated as a “ tensor product" fairing of PS-curves. When an EOD fairing results in oscillations, a $2^{nd}$ difference moving-average method is applied to the faired PS-curve as an additional postprocessing'operation to remove the oscillations. For fairing of triangular-net data, a modified forth difference fairing scheme is proposed. In this scheme, a forth difference at each vertex is computed by blending the position of the current vertex, positions and “ tangent vectors" of its neighbor vertices, and fairing is confined to the normal vector direction of the current vertex. The proposed fairing method was applied to various types of triangular net data, and it was found to be superior to existing fairing methods.

서지기타정보

서지기타정보
청구기호 {DIE 00015
형태사항 vi, 89 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 : A, 2차원 이산 푸리에 변화. - B, 용어 정리
저자명의 영문표기 : Su-Kyeong Cho
지도교수의 한글표기 : 최병규
지도교수의 영문표기 : Byoung-K. Choi
수록잡지명 : "Difference fairing analysis based-on DFT filter". Computer Aided Design
학위논문 학위논문(박사) - 한국과학기술원 : 산업공학과,
서지주기 참고문헌 : p. 83-85
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