• 한국항공운항학회지
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• 제18권2호
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• pp.16-22
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• 2010

This paper proposes the real-time moving object tracking system UAV using color information. Case of object tracking, it have studied to recognizing the moving object or moving multiple objects on the fixed camera. And it has recognized the object in the complex background environment. But, this paper implements the moving object tracking system using the pan/tilt function of the camera after the object's region extraction. To do this tracking system, firstly, it detects the moving object of RGB/HSI color model and obtains the object coordination in acquired image using the compact boundary box. Secondly, the camera origin coordination aligns to object's top&left coordination in compact boundary box. And it tracks the moving object using the pan/tilt function of camera. It is implemented by the Labview 8.6 and NI Vision Builder AI of National Instrument co. It shows the good performance of camera trace in laboratory environment.

• 방송공학회논문지
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• 제25권2호
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• pp.265-274
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• 2020

자유 시점 비디오 서비스는 사용자와의 상호작용을 통해 원하는 임의의 각도나 위치, 거리에서 시청할 수 있게 하는 기술이다. 본 논문에서는 사용자가 선택하여 시청할 수 있는 자유 시점 비디오 서비스를 Inward view, Outward view, 3D object view, First person view의 네 가지 시청 모드로 정의하였으며 하나의 플레이어에서 시청이 가능한 새로운 통합 프로그램을 개발 및 구현하였다. 아이돌 공연과 농구 경기 콘텐츠에 대해 각 시청 모드에 적합한 다시점 카메라를 설치하여 데이터를 확보하였으며, 서버에 저장된 데이터가 네트워크를 통해 스트리밍 됨으로써 시청이 가능하도록 하였다. 사용자는 자유롭게 네 가지의 시청 모드와 공간상의 위치, 각도 등을 선택할 수 있으며, 선택된 시점에 맞는 영상과 음향이 렌더링 되어 통합 플레이어에 표출된다. 이는 기존의 자유 시점 비디오 서비스를 포함한 다양한 시청 형태를 결합함으로써 사용자에게 몰입감과 현장감을 제공할 수 있을 뿐만 아니라 확장성이 있는 자유 시점 비디오 서비스 플레이어가 될 것으로 기대된다.

• 한국생산제조학회지
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• 제8권6호
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• pp.26-34
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• 1999

This study shows an alternative method for the determination of object's position, based on a computer vision method. This approach develops the vision system model to define the reciprocal relationship between the 3-D real space and 2-D image plane. The developed model involves the bilinear six-view parameters, which is estimated using the relationship between the camera space location and real coordinates of known position. Based on estimated parameters in independent cameras, the position of unknown object is accomplished using a sequential estimation scheme that permits data of unknown points in each of the 2-D image plane of cameras. This vision control methods the robust and reliable, which overcomes the difficulties of the conventional research such as precise calibration of the vision sensor, exact kinematic modeling of the robot, and correct knowledge of the relative positions and orientation of the robot and CCD camera. Finally, the developed vision control method is tested experimentally by performing determination of object position in the space using computer vision system. These results show the presented method is precise and compatible.

• 한국조경학회지
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• 제27권4호
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• pp.59-64
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• 1999

This study is about gaining orientation through anchorage act of a group of ferryman. In addition, a point acquisition and character of landmark that is closely realated to a point acquisition would be clarified by studying the form of configuration of the earth and object which is used landmark for anchorage. There are 13 anchorage points in the north part of Pusan harbor. 12 anchorage points are used to anchor. A ferryman let a ship which is temporarily anchoring move safely and speedily at the anchorage point. At that time, he uses landmarks by a technique of Overlay View. Between landmarks and viewer would be formed exquisite location combination. A mountain peak, a peak of island, nature configuration of land such as intermitent rock and location, size and form of buildings or structures of a city were variously appeared as landscape elements which were used landmarks. Looking at conditions to be easily captured as a target object, 1. A particular point of a mountain ridge line which was not shield by buildings. 2. In case objects have similar form, the building which was located in the front or the highest. 3. In case of a singular object, whatever there is physical elements, that would be a target object. Through this study a configuration of the ground such as a mountain peak which is become the background of harbor landscape is very important element to find anchorage point in configuration of the ground and object. So, the continuous preservation of the contour line of mountain is needed to do safe and effective anchorage act.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권8호
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• pp.4160-4173
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• 2019

Borescopes facilitate the inspection of areas inside machines and systems that are not directly accessible for visual inspection. They offer real-time, up-close access to confined and hard-to-access spaces without having to dismantle or destructure the object under inspection. Borescopes are ideal instruments for routine maintenance, quality inspection and monitoring of systems and structures. The main application being fault or defect detection, it is useful to have measuring capability to quantify object dimensions in a target area. High-end borescopes use multi-optic solutions to provide measurement information of viewed objects. Multi-optic solutions can provide accurate measurements at the expense of structural complexity and cost increase. Measuring functionality is often unavailable in low-end, single camera borescopes. In this paper, a single camera measurement solution that enables the size estimation of viewed objects is proposed. The proposed solution computes and overlays a scaled grid of known spacing value over the screen view, enabling the human inspector to estimate the size of the objects in view. The proposed method provides a simple means of measurement that is applicable to low-end borescopes with no built-in measurement capability.

• Journal of Multimedia Information System
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• 제7권1호
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• pp.11-16
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• 2020

Deep Learning has become the most important technology in the field of artificial intelligence machine learning, with its high performance overwhelming existing methods in various applications. In this paper, an interactive window service based on object recognition technology is proposed. The main goal is to implement an object recognition technology using this deep learning technology to remove the existing eye tracking technology, which requires users to wear eye tracking devices themselves, and to implement an eye tracking technology that uses only usual cameras to track users' eye. We design an interactive system based on efficient eye detection and pupil tracking method that can verify the user's eye movement. To estimate the view-direction of user's eye, we initialize to make the reference (origin) coordinate. Then the view direction is estimated from the extracted eye pupils from the origin coordinate. Also, we propose a blink detection technique based on the eye apply ratio (EAR). With the extracted view direction and eye action, we provide some augmented information of interest without the existing complex and expensive eye-tracking systems with various service topics and situations. For verification, the user guiding service is implemented as a proto-type model with the school map to inform the location information of the desired location or building.

• 한국정보통신학회논문지
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• 제9권3호
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• pp.561-569
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• 2005

현재 소프트웨어 개발의 주요한 패러다임인 객체지향 설계를 많은 시스템들이 채택하고 있으나, 화상 대화를 대상으로 한 연구들에서 본격적인 객체지향 설계의 적용은 그리 많지 않은 실정이다. 따라서 본 논문에서는 화상 대화 시스템에 대한 객체지향 설계를 위한 UML을 이용한 체계적인 아키텍처의 설계를 제시한다. 화상 대화 시스템에 대하여 체계적인 기능/비기능적 요구사항을 포착하고, '4+1 View Model'을 적용하여 객체지향 설계를 함으로써, 컴포넌트들은 재사용성을 담보하며, 이후 필요에 따라 컴포넌트들을 추가하여 시스템을 확장하는 것이 가능하다. 또한, 본 논문에서 설계한 화상 대화 애플리케이션의 컴포넌트들은 다른 여러 화상 대화 시스템에 활용 가능하며, 웹 환경에서의 서비스로도 확장될 것으로 기대된다.

• 한국컴퓨터산업학회논문지
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• 제3권3호
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• pp.351-362
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• 2002

SNMP 관리 영역이 네트워크에서 시스템, 요금데이터 등 다양한 영역으로 확대되고, 보다 중요한 데이터를 전송하는 수단으로 사용된다. SNMPv3는 사용자그룹기반의 view기반 보안모델을 통한 보안강화 기능을 제공한다. 그러나, view기반보안모델을 이용한 보안관리는 데이터 접근목적에 연관된 접근제어 기능이 없고, 다양한 사용자그룹 생성에 따른 관리의 복잡성이 증대되는 문제가 있다. 따라서, 이러한 관리의 복잡성 문제를 해결하고, 보안강화를 하기 위한 직무기반 보안모델을 통한 접근강화 방법을 제안한다. 제안된 직무기반 보안관리는 관리대상에 따라 네트워크관리자 직무, 시스템 관리자 또는 계정관리자 등의 직무로 구분하여 직무를 통한 접근을 제한하여 관리의 복잡성을 해소하고, 직무와 목적간 관계를 확인하여 보다 강화된 보안기능을 제공한다.

• 지구물리와물리탐사
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• 제5권1호
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• pp.1-5
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• 2002

본 연구에서는 2차원적으로 획득된 3차원 자료를 데이타베이스 화하고 이를 3차원적으로 분석하는데 필요한 도구인 모델링 및 시각화 소프트웨어를 ArcView환경에서 개발하였다. 본 소프트웨어는 유한개의 수평 단면으로 입력되는 자료로부터 개체의 형태를 3차원 공간상에서 구성하고 시각화한다. 프로그램은 구성된 개체로부터 임의 방향과 경사를 가진 단면을 생성할 수 있으며 단면의 수정을 통하여 해석자가 원하는 형태로 모델을 개선하는 기능을 보유하고 있다.

• 산업경영시스템학회지
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• 제21권45호
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• pp.33-45
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• 1998

The typical characteristic of PDM(Product Data Management) System seperates the databases to store the meta data and applications. Therefore, meta data contains the information for the location of file, user profiles, relationships between the files, and process. PDM utilizes these information efficiently and does file management, configuration management, and process management. In this view, the integration strategy of PDM is to merge data and process. In the view of architecture, the interface between data and application and the actions of each application execute seamlessly. This architecture is viewed as integrated data and process among enterprises and implemented with client/server technology in distributed process environment that interfaced with open object-oriented technology which is developed with business object in the object-oriented infrastructure. In this paper, we studied the definition, function, and scope of PDM and researched the core technologies to implement the PDM integration environment. We also researched the PDM utilization in distributed enterprise environment and implementation of PDM integration environment with this technical background.