• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.21 no.3
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• pp.229-236
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• 2003

This study recorded an object using a digital video recorder, and then tried to estimate 3-D positional information and to reconstruct an image. Firstly, the accuracy of measurement results from a video recorder was evaluated and tested for an applicability, then it applied to a real object to construct 3-D digital model. This study assumed that there is no lens distortion in a video recorder, and all bundles should precisely pass through the projection center of a lens. The image size for orientations is determined by the size of CCD chip and the number of pixels. The average squared error from the result by a digital video recorder and that by triangular survey from 1-second theodolite shows 0.0173m error in x,y coordinates. Without knowing the accurate information on the lens distortion and the coordinates of the projection center, this study reasonably produces acceptable results in the reconstruction of 3-D model. In consequence, this study found that the image from a digital video camera can be reconstructed 3-D model only from the information on a camera type.

• The Science & Technology
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• v.29 no.11 s.330
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• pp.75-78
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• 1996

비디오 카세트 리코더(VCR)가 등장한 1970년대 이래 가장 중요한 가전제품이 마침내 가을바람과 함께 우리 옆에 모습을 드러내기 시작했다. 오랫동안 고대하던 디지털 비디오 디스크는 영화관 수준의 품질을 가진 영상과 스트레오 음향을 우리에게 낯익은 오디오 콤팩트 디스크(CD)와 닮은 디스크에 실어 우리 안방극장에 제공한다. 한쪽에 4.7기가바이트씩의 용량을 가진 한장의 DVD는 '바람과 함께 사라지다' 정도의 길이를 가진 고화질의 영화 한편을 수록할 수 있다. DVD는 음악, 영화, 게임 그리고 다른 멀티미디어 패키지를 저장할 수 있다. 그래서 거추장스런 종래의 비디오카세트는 물론 레이저디스크, 오디오, CD 그리고 심지어는 오늘날 출시되는 신형 컴퓨터 4대중 3대꼴로 내장된 씨디롬도 결국은 DVD 앞에서 무릎을 꿇고 말 것이라고 생각하는 사람들이 많다.

• Journal of Internet Computing and Services
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• v.3 no.2
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• pp.69-77
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• 2002

Recently, Digital video is one of the important information media delivered on the Internet and playing an increasingly important role in multimedia. This paper proposes a Video Browsing Service(VBS) that provides both the video content retrieval and the video browsing by the real-time user interface on Web, For the scene segmentation and key frame extraction of video sequence, we proposes an efficient scene change detection method that combines the RGB color histogram with the $x^2$(Chi Square) histogram. Resulting key frames are linked by both physical and logical indexing, This system involves the video editing and retrieval function of a VCR's, Three elements that are the date, the field and the subject are used for video browsing. A Video Browsing Service is implemented with MySQL, PHP and JMF under Apache Web Server.