서지주요정보
해상도 맵을 이용한 계층적 모자이크 구성과 단계적 잔여 움직임 추정 = Hierarchical mosaic construction using a resolution map and progressive residual motion estimation
서명 / 저자 해상도 맵을 이용한 계층적 모자이크 구성과 단계적 잔여 움직임 추정 = Hierarchical mosaic construction using a resolution map and progressive residual motion estimation / 이청우.
저자명 이청우 ; Lee, Cheong-Woo
발행사항 [대전 : 한국과학기술원, 2004].
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등록번호

8015540

소장위치/청구기호

학술문화관(문화관) 보존서고

DEE 04012

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초록정보

Due to an enormous production of multimedia materials, a mosaic has become a valuable representation of the video sequences in the application field such as video surveillance, interactive video edition and manipulation, low-bitrate video transmission, and so on. These applications require efficient representations of huge video data and suitable methods of storing and accessing the video data. In this thesis, we propose the efficient alignment algorithm to compensate for small amounts of motion parallax introduced by unmodeled distortions. Also, we propose a new type of mosaic to minimize the loss of image data occurred by coordinate transformations. After the global alignment has been run, there may still be localized mis-registrations present in the mosaic, due to deviations from the idealized parallax-free motion model. To estimate the residual motion vectors occurred by mis-registrations consumes heavy computational powers. In the proposed algorithm, residual motion vectors are estimated with the adequate size of estimation and measurement windows and with adjustment of initial vectors according to the established priority. By construction of mosaic with the proposed algorithm, we demonstrate the removal of seams by mis-registrations. While many researchers have focused on the issue of how to develop an exact representation with algorithms related to image alignment and scene composition, little attention has been attracted on the issue of how to minimize the loss of image data occurred by coordinate transformations in the construction of a single-view mosaic. This kind of loss occurs in some regions of a single-view mosaic, where sufficient samples are not assigned to represent the image data contained in high resolution frames before transformations. A resolution map is introduced in order to measure the spatially required number of samples. By segmenting it, we decide which regions will be included and what will be the representative of the resolution in the considered layer. Using the representatives, each layer has the specific coordinate system and intensities of all the samples are blended with the recalculated transforming parameters. We also propose an efficient coding scheme for the proposed mosaic. Simulation results show the increase of the image qualities of the frames reconstructed from the proposed mosaic with given storage volumes.

서지기타정보

서지기타정보
청구기호 {DEE 04012
형태사항 xi, 130 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Cheong-Woo Lee
지도교수의 한글표기 : 김성대
지도교수의 영문표기 : Seong-Dae Kim
수록잡지명 : "Non-uniformly sampled mosaic construction using resolution map". Electronics letters, v.38 no.24, pp. 1515-1516(2002)
학위논문 학위논문(박사) - 한국과학기술원 : 전기및전자공학전공,
서지주기 참고문헌 : p. 127-130
주제 해상도 맵
계층적 모자이크
잔여 움직임 추정
모자이크 부호화
RESOLUTION MAP
HIERARCHICAL MOSAIC
RESIDUAL MOTION ESTIMATION
MOSAIC ENCODING
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