• Journal of the Korean Society for Precision Engineering
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• v.18 no.3
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• pp.18-22
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• 2001

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2011.10a
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• pp.299-300
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• 2011

• The Journal of the Korea Contents Association
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• v.16 no.1
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• pp.515-520
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• 2016

Volumetric image system has many applications recently in education, 3D movie, medical images but these applications have several problems that need to be overcome. Volumetric display may process a amount of visual data and design the high efficient vision system for realtime display. In case of stereo system for volumetric display motion vectors, disparity vectors from the stereoscopic sequences and residual images with the reference images has been transmitted, and the stereoscopic sequences have been reconstructed at the receiver for volumetric display. So central issue for the design of efficient volumetric image system lies in selecting an appropriate stereo matching and robust vision system. In this paper, we proposed high efficient vision system, which design vision stage with rotating and moving horizontally, and match the successive stereo image efficiently. In experimental results with volumetric image system, the proposed method represents high efficiency with minimizing error and low computational load for volumetric display.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.4 no.5
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• pp.1157-1163
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• 2000

In this paper, we present a novel and practical stereo vision system that uses only one camera and four mirrors placed in front of the camera. The equivalent of a stereo pair of images are formed as left and right halves of a single CCD image by using four mirrors placed in front of the ten of a CCD camera. An object arbitrary point in 3D space is transformed into two virtual points by the four mirrors. As in the conventional stereo system, the displacement between the two conjugate image points of the two virtual points is directly related to the depth of the object point. This system has the following advantages over traditional two camera stereo that identical system parameters, easy calibration and easy acquisition of stereo data.

• Journal of Korea Multimedia Society
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• v.5 no.3
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• pp.272-280
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• 2002

In this paper, we present a method to extract a moving object and to measure the distance to it by using the stereo vision system. The moving factor is to be extracted through a match of a pixel unit for the moving object where the adaptive threshold is effectively dealt with to remove changes in the brightness of the image. The distance to moving object is measured by using a stereo vision system which employs a parallel camera. The experimental results show that the proposed algorithm could be effectively applied to distance measurement to moving object because it has an average error of one percent.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2003.06a
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• pp.915-919
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• 2003

This paper presents a fuzzy-motion-control based tracking algorithm of mobile robots, which uses the geometrical information derived from the active stereo-vision system mounted on the mobile robot. The active stereo-vision system consists of two color cameras that rotates in two angular dimensions. With the stereo-vision system, the center position and depth information of the target object can be calculated. The proposed fuzzy motion controller is used to calculate the tracking velocity and angular position of the mobile robot, which makes the mobile robot keep following the object with a constant distance and orientation.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.15 no.12
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• pp.1002-1016
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• 1990

This paper described design and implementation of stereo vision system, and also, proposed method for displacement estimation of 3-D moving object using this system. The extraction of moving object is obtained by difference image algorithm. Geometrical position of 3-D moving object is calculated form the mapping of center area of two's 2-D object. 3-D coordinate position produced space depth, moving velociity, distance, moving track and proved displacement estimation of 3-D moving object.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2001.10a
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• pp.209-213
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• 2001

본 논문에서 계산구현 방법이 간단하고, 물체에 대한 정보 획득 측면에서 효율성을 기할 수 있는 스테레오 비전 알고리즘이 제시된다. 이는 공간을 미리 계획된 다단 평면상에 놓이는 물체점들을 역투시 변환에 의한 영상의 재투영 과정과 영상면 상관법에 의해서 평면상의 정보를 순차적으로 구한다. 제안된 알고리즘은 이동로보트의 장애물 감지작업에 적용하여 그 효율성을 보인다.

• Journal of the Korean Society for Precision Engineering
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• v.23 no.10
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• pp.14-21
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• 2006

• Proceedings of the Korea Information Processing Society Conference
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• 2005.05a
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• pp.855-858
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• 2005

본 시스템은 어항 속의 물고기 움직임을 추적하기 위해 직교식 스테레오 비젼 시스템(Othogonal Stereo Vision System)으로부터 동시에 독립된 영상을 획득하고 획득된 영상을 처리하여 좌표를 얻어내고 3차원 좌표로 생성해내는 시스템이다. 제안하는 방법은 크게 두 대의 카메라로부터 동시에 영상을 획득하는 방법과 획득된 영상에 대한 처리 및 물체 위치 검출, 그리고 3차원 좌표 생성으로 구성된다. Frame Grabber를 사용하여 초당 8-Frame의 두 개의 영상(정면영상, 상면영상)을 획득하며, 실시간으로 갱신하는 배경영상과의 차영상을 통하여 이동객체를 추출하고, Labeling을 이용하여 Clustering한 후, Cluster의 중심좌표를 검출한다. 검출된 각각의 좌표를 직선방정식을 이용하여 3차원 좌표보정을 수행하여 이동객체의 좌표를 생성한다.