• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2000년도 추계종합학술대회 논문집(4)
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• pp.33-36
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• 2000

To create a more realistic soccer game derived from TV images, we are developing an image synthesis system that generates 3D image sequence from TV images. We propose the method for the team and the pose recognition of players in TV images. The representation includes camera calibration method, team recognition method and pose recognition method. To find the location of a player on the field, a field model is constructed and a player's field position is transformed by 4-feature points. To recognize the team information of players, we compute RGB mean values and standard deviations of a player in TV images. Finally, to recognize pose of a player, this system computes the velocity and the ratio of player(height/width). Experimental results are included to evaluate the performance of the team and the pose recognition.

• 비파괴검사학회지
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• 제29권6호
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• pp.557-562
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• 2009

Abrupt change of cross-section in mechanical parts is one of significant causes of structural fracture. In this paper, a hybrid method is employed to analyze the stress distribution of a discontinuous plate. The plate with an inclined crack is utilized in our experiment and the stress field in the vicinity of crack tip is calculated through isochromatic fringe order of given points. This calculation can be made handy through least-squares method integrated with complex power series representation(Laurent series) implemented on a computer program for high-speed processing. In order to accurately compare calculated results with experimental ones, both of actual and regenerated photoelastic fringe patterns are doubled and sharpened by digital image processing. The experiment results show that regenerated patterns obtained by hybrid method are quite comparable to actual patterns.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1998년도 추계종합학술대회 논문집
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• pp.829-832
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• 1998

본 연구에서 시각 장애인을 위한 인터넷 웹 브라우저를 개발하였다. 인터넷 웹 브라우저 시스템은 인터넷에 연결된 컴퓨터와 문자 출력을 위한 점자 출력기와 음성 합성기, 그림 이미지의 출력을 위한 촉감 출력기, 인터넷 웹 페이지를 출력하기 위한 점자 프린터로 구성된다. 인터넷의 문자 정보는 점자로 변환하여 점자 출력기로 출력하였고, 전자석(solenoid) 방식의 구동기로 동작하는 촉감장치로 인터넷의 그림 정보를 출력하였다. 본 시스템을 이용하여 시각 장애인은 인터넷 웹 사이트 정보를 접근할 수있다.

• 한국컴퓨터그래픽스학회논문지
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• 제14권1호
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• pp.17-25
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• 2008

본 논문은 프로그래밍 가능한 GPU를 이용한 포토 모자이크 생성 방법을 제안한다. 그래픽스 파이프라인을 통해 포토 모자이크를 생성할 수 있도록 정점을 디자인하고, 타일로 사용할 영상 데이터베이스의 텍스처 표현을 제시한다. 정점 셰이더에서는 텍스처에 저장된 입력 영상과 타일 영상들을 이용해 최적 타일을 찾고, 프래그먼트 셰이더는 이것을 프레임 버퍼에 그림으로써 포토 모자이크를 생성한다. 본 논문에서 제안한 방법은 최적 타일을 찾는 기존의 포토 모자이크 알고리즘에 비해 월등히 빠른 결과를 보여준다.

• 한국감성과학회:학술대회논문집
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• 한국감성과학회 2000년도 춘계 학술대회 및 국제 감성공학 심포지움 논문집 Proceeding of the 2000 Spring Conference of KOSES and International Sensibility Ergonomics Symposium
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• pp.149-156
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• 2000

The aim of this study is to propose the predictive index and analyze the effect of lightsources and colour image types in the residence and office interior.This study was consisted of four steps, and was carried out as follows. 1) The condition of experiment was set up by optical characteristic of lightsources and colours. 2) The scaled model space was manufactured for the evaluation of the same condition by each space. And, some piece of furniture was manufactured for the representation of each space. 3) The emotivity response of lightsources and colours was measured. 4) Results of the evaluation of lightsources and colours were compared and analyzed by conditions, and the predictive index was proposed by image types.

• 인지과학
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• 제2권2호
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• pp.359-403
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• 1990

컴퓨터의 눈이라고 불리우는 감지 장치를 통하여 얻어진 항공 사진에 관한 영상을 분할하고, 이런 초기자료를 바탕으로 영상을 해석하여 건물 및 도로에 관한 정보를 추출하는 흑판 시스템을 소개한다. 흑판 시스템의 구성요소인 흑판, 지식원, 제어 모듈의 기능및 역할이 지식 표현과 제어 전략 측면에서 설명된다. 프레임 형태를 취하는 흑판위의 가설들의 계층적 구조와 가설 생성및 검증을 담당하는 지식원의 구조에 대하여 소개하고, 이들 지식원을 운영하여 원하는 해를 구해가는 제어 전략에 대하여 상세히 소개한다. 특히, 영상자료의 탐색 영역을 제한하기 위한 매핑 영상의 활용 방법에 대하여 소개한다.

• Journal of Multimedia Information System
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• 제1권1호
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• pp.1-10
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• 2014

In this paper, we propose a new view synthesis technique for coding of multi-view color and depth data in arbitrary camera arrangements. We treat each camera position as a 3-D point in world coordinates and build clusters of those vertices. Color and depth data within a cluster are gathered into one camera position using a hierarchical representation based on the concept of layered depth image (LDI). Since one camera can cover only a limited viewing range, we set multiple reference cameras so that multiple LDIs are generated to cover the whole viewing range. Therefore, we can enhance the visual quality of the reconstructed views from multiple LDIs comparing with that from a single LDI. From experimental results, the proposed scheme shows better coding performance under arbitrary camera configurations in terms of PSNR and subjective visual quality.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2008년도 하계종합학술대회
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• pp.995-996
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• 2008

This paper proposes a algorithm that generate the intermediate scene from the stereo image. This system based on mesh representation method, and segmented objects which ar calculated from triangles the pro proposed algorithm is composed of two steps. One is triangle grouping using gestalt theory, and the other is disparity estimation using average disparity of segmented object. We make an experiment on the proposed algorithm with some stereo images and obtain good quality disparity map for intermediate scenes.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.167.6-167
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• 2001

The cylindrical environment maps of image-based representation methods make high-quality, simple and low-price real-time navigation possible. In this paper, we propose a method to navigate from one viewpoint to the next in the virtual inside space, composed of several cylindrical environment maps. Our system is classified into the two modules. first of all, the panoramic image viewer that employs the rotation and zoom-in/out methods to navigate the virtual inside space, such as the Quicklime VR. The other is smooth real-time navigation using cubic mesh interpolation when the viewpoint moves from one environment map to another in the virtual space.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2002년도 ICCAS
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• pp.96.2-96
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• 2002

In this paper, a new method for the mixed image separation is presented using the independent component analysis, the innovation process, and the expectation-maximization. In general, the independent component analysis (ICA) is one of the widely used statistical signal processing scheme that represents the information from observations as a set of random variables in the form of linear combinations of another statistically independent component variables. In various useful applications, ICA provides a more meaningful representation of the data than the principal component analysis through the transformation of the data to be quasi-orthogonal to each other, which can be utilized in linear p...