서지주요정보
3차원 모델 정보와 가상 전기장을 이용한 액티브 컨투어 모델 = 3D Model based active contour model using virtual electric field
서명 / 저자 3차원 모델 정보와 가상 전기장을 이용한 액티브 컨투어 모델 = 3D Model based active contour model using virtual electric field / 박현근.
저자명 박현근 ; Park, Hyun-Keun
발행사항 [대전 : 한국과학기술원, 2003].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8014750

소장위치/청구기호

학술문화관(문화관) 보존서고

DEE 03048

SMS전송

도서상태

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반납예정일

초록정보

This dissertation deals with active contour model based on object model. Active contour model is a deformable contour that can converge on edges of an object in an image for obtaining information related with the object. However, in noisy environment, a contour may converge edges of unexpected objects because conventional active contour model uses only edge information. In order to solve the poor convergence problem, this dissertation proposes a new active contour model using three-dimensional object model in noisy environment. In this dissertation a contour on two-dimensional image is assumed as the projection of three-dimensional rigid body object that moves freely in three-dimensional space. Therefore, the contour is deformed with restriction imposed by 11 variables that form projection matrix that represents relation between three-dimensional object and two-dimensional contour. This dissertation also proposes virtual electric field in order that a contour converges on edges of an object in an image. Virtual electric field is a vector field that is created by virtual charges. The intensities of edge image computed by edge operator such as sobel, prewitt, etc. are considered as the virtual charges from which virtual electric field is generated. Under virtual electric field, each node of a contour with positive virtual charge is forced toward the edge of an object. From the converged nodes of a contour by virtual electric field and three-dimensional object model, the projection matrix is obtained and a contour is re-projected by the obtained projection matrix and three-dimensional model for restricting deformation. Also camera intrinsic parameters and pose of the object are recovered from the obtained projection matrix. For fast computation, the formula for virtual electric field is represented as the convolution of an edge image and pre-defined mask. In modern computing technology, the convolution is calculated rapidly by dedicated hardware such as DSP and MMX. Simulations and experiments show that the proposed algorithm operates at 10 frame/sec on a standard hardware and a contour can converge on the edge of the target object even under noisy environment.

서지기타정보

서지기타정보
청구기호 {DEE 03048
형태사항 ix, 116 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Hyun-Keun Park
지도교수의 한글표기 : 정명진
지도교수의 영문표기 : Myung-Jin Chung
수록잡지명 : "New external force of snake: virtual electric field". Electronics letters, v.38 no.4, pp.1500-1502(2002)
학위논문 학위논문(박사) - 한국과학기술원 : 전기및전자공학전공,
서지주기 참고문헌 : p. 113-116
주제 액티브 컨투어 모델
물체 추적
위치 복원
Active Contour Model
snake
tracking
pose recovery
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