• 대한원격탐사학회지
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• 제23권5호
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• pp.365-373
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• 2007

Car navigation system is a key application in geographic information system and telematics. A recent trend of car navigation system is using real video captured by camera equipped on the vehicle, because video has more representation power about real world than conventional map. In this paper, we suggest a visual car navigation system that visually represents route guidance. It can improve drivers' understanding about real world by capturing real-time video and displaying navigation information overlaid directly on the video. The system integrates real-time data acquisition, conventional route finding and guidance, computer vision, and augmented reality display. We also designed visual navigation controller, which controls other modules and dynamically determines visual representation methods of navigation information according to current location and driving circumstances. We briefly show implementation of the system.

• 한국콘텐츠학회논문지
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• 제9권6호
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• pp.92-103
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• 2009

컴퓨터 그래픽스 기술의 발달로 영화 초기에 사용되던 특수효과의 대부분은 컴퓨터 그래픽스 기술을 사용한 비주얼 이펙트 기술로 대체 되었다. 이러한 변화에 따라 현대 영화의 이펙트 장면은 감독과 비주얼 이펙트 제작자의 상호 소통에 의해 합의가 이루어진 후 제작된다. 하지만 감독과 비주얼 이펙트 제작자는, 스토리를 전달하기 위한 내러티브 언어와 컴퓨터 그래픽스의 기술 언어라는 각자의 언어를 사용한 커뮤니케이션으로 인해 제작과정의 많은 시행착오를 겪게 된다. 이 연구에서는 감독과 비주얼 이펙트 제작자의 원활한 커뮤니케이션을 돕기 위한 자료검색 시스템을 제안 하고자 한다. 제안된 시스템은 내러티브와 비주얼 이펙트 사용의 적절함을 인정받은 영화 14편에서 비주얼 이펙트가 사용된 장면을 찾아 내러티브와 비주얼 이펙트를 유형별로 분석하고, 사용된 컴퓨터 그래픽스 기술을 데이터베이스화하여 그 장면을 검색 할 수 있도록 만든 어플리케이션이다. 감독과 비주얼 이펙트 제작자는 이 어플리케이션을 통해 원하는 비주얼 이펙트 장면을 찾아 빠르게 장면에 대한 합의에 도달하여 합리적인 제작 파이프라인을 구축할 수 있도록 도울 것이다.

• Journal of Korean Biological Nursing Science
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• 제16권4호
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• pp.342-348
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• 2014

Purpose: The purpose of this study was to examine the effects of pressure ulcer classification system education on hospital nurses' knowledge and visual discrimination ability of pressure ulcer classification system and incontinence-associated dermatitis. Methods: One group pre- and post-test was used. A convenience sample of 96 nurses participating in pressure ulcer classification system education, were enrolled in single institute. The education program was composed of a 50-minute lecture on pressure ulcer classification system and case-studies. The pressure ulcer classification system and incontinence-associated dermatitis knowledge test and visual discrimination tool, consisting of 21 photographs including clinical information were used. Paired t-test was performed using SPSS/WIN 18.0. Results: The overall mean difference of pressure ulcer classification system knowledge (t=4.67, p<.001) and visual discrimination ability (t=10.58, p<.001) were statistically and significantly increased after pressure ulcer classification system education. Conclusion: Overall understanding of pressure ulcer classification system and incontinence-associated dermatitis after pressure ulcer classification system education was increased, but tended to have lack of visual discrimination ability regarding stage III, suspected deep tissue injury. Differentiated continuing education based on clinical practice is needed to improve knowledge and visual discrimination ability for pressure ulcer classification system, and comparison experiment research is required to evaluate its effects.

• 디자인학연구
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• 제12권4호
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• pp.273-282
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• 1999

타이포그라피는 그래픽 디자인에 있어서 가장 기본적이며 중요한 주제이다. 이러한 타이포그라피를 교육하고 학습함에 있어서 감성적인 교육에 앞서 체계적이고 논리적인 그리고 전체론적인 교육이 필요하다. 특히 전체론적 관점은 디지털 매체를 이용한 타이포그라피 디자인이나 교육에서 더욱 강조되어야한다. 디지털 매체에 익숙해져 있는 학습자들은 새로운 테크날로지란 디자인의 새로운 가능성을 모두 대체할 수 있는 것이 아님을 알아야 한다. 비주얼시스템은 학습자가 객관적으로 사고하고 방법을 찾는 능력을 배양시켜주는 학습 방식이다. 이 학습을 통해서 학습자는 문제 해결을 위해서 논리와 감성을 함께 사용하는 방법을 배운다. 이 논문은 시스템이란 무엇이고 이 개념을 어떻게 타이포그라피 교육을 위한 비주얼 시스템으로 계발할 수 있는지를 교육사례를 들어 연구한 것이다. 그리고 비주얼시스템의 타이포그레피 교육에 대한 요용성과 가능성을 연구한 것이다.

• 지능정보연구
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• 제13권4호
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• pp.79-90
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• 2007

영상의 품질을 측정하는 것은 영상처리에서 매우 중요한 문제이다. 지금까지 영상 품질을 측정하기 위한 다양한 방법들이 제시되었고, 이들은 수학적인 관점에서 영상의 품질을 적절히 표현해주고 있다. 그러나, 수학적인 측정과 인간의 시각에 의해서 측정되는 품질은 서로 다를 수 있고 영상이 전달되는 최종 대상체는 인간의 시각이기 때문에 이를 고려한 영상품질 측정 방법이 필요하다. 본 논문에서는 사람의 시각적 특성을 고려하여 영상 품질을 측정할 수 있는 통계적 방법을 제시하였다. 사람의 시각은 영상의 전체적인 품질을 판단하면서도 국부적인 위치에서의 품질을 판단하며, 전체적인 영상의 품질보다는 국부적인 위치에서의 품질이 시각적인 영상품질 판단에 미치는 영향이 크다. 본 논문에서는 영상을 세그먼트화하고 각 세그먼트화된 영상에서 얻어진 영상 품질 값에 스코어링을 하는 통계적 기법을 사용하여 시각에 의한 판단과 유사한 결과를 얻었다.

• KIEAE Journal
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• 제3권2호
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• pp.25-32
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• 2003

This study deals with the investigation of recognition structure on architectural environment and reconstruction of it by artificial intelligence. To test the possibility of the reconstruction, recognition structure on architectural environment is analysed and each steps of the structure are matched with computational methods. Edge Detection and Neural Network were selected as matching methods to each steps of recognition process. Visual perception system established by selected methods is trained and tested, and the result of the system is compared with that of experiment of human. Assuming that the artificial system resembles the process of human recognition on architectural environment, does the system give similar response of human? The result shows that it is possible to establish artificial visual perception system giving similar response with that of human when it models after the recognition structure and process of human.

• 한국멀티미디어학회논문지
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• 제22권4호
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• pp.417-423
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• 2019

This paper presents an evaluation system to determine the completeness of a space map obtained by a visual SLAM(Simultaneous Localization And Mapping) algorithm. The proposed system consists of three parts. First, the proposed system detects the occurrence of loop closing to confirm that users acquired the information from all directions. Thereafter, the acquired map is divided with regular intervals and is verified whether each area has enough map points to successfully estimate users' position. Finally, to check the effectiveness of each map point, the system checks whether the map points are identifiable even at the location where there is a large distance difference from the acquisition position. Experimental results show that space maps whose completeness is proven by the proposed system has higher stability and accuracy in terms of position estimation than other maps that are not proven.

• 반도체디스플레이기술학회지
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• 제20권4호
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• pp.96-101
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• 2021

The SLAM market is growing rapidly with advances in Machine Learning, Drones, Augmented Reality technologies. However, due to the absence of an open source-based SLAM library for developing AR content, most SLAM researchers are required to conduct their own research and development to customize SLAM. In this paper, we propose an opensource-based Mobile Markerless AR System by building our own pipeline based on Visual SLAM. To implement the Mobile AR System of this paper, it uses ORB-SLAM3 and Unity Engine and We experimented with running our system in a real environment and confirming it in the Unity Engine's Mobile Viewer. Through this experimentation, we can verify that the Unity Engine and the SLAM System are tightly integrated and communicate smoothly. Also, we expect to accelerate the growth of SLAM technology through this research.

• 대한인간공학회지
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• 제34권3호
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• pp.235-245
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• 2015

Objective: The purpose of this study is to develop visual complexity metrics based on theoretical bases. Background: With the development of IT technologies, drivers process a large amount of information caused by automotive human-machine interface (HMI), such as a cluster, a head-up display, and a center-fascia. In other words, these systems are becoming more complex and dynamic than traditional driving systems. Especially, these changes can lead to the increase of visual demands. Thus, a concept and tool is required to evaluate the complicated systems. Method: We reviewed prior studies in order to analyze the visual complexity. Based on complexity studies and human perceptual characteristics, the dimensions characterizing the visual complexity were determined and defined. Results: Based on a framework and complexity dimensions, a set of metrics for quantifying the visual complexity was developed. Conclusion: We suggest metrics in terms of perceived visual complexity that can evaluate the in-vehicle displays. Application: This study can provide the theoretical bases in order to evaluate complicated systems. In addition, it can quantitatively measure the visual complexity of In-vehicle information system and be helpful to design in terms of preventing risks, such as human error and distraction.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.1771-1772
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• 2007

The purpose of this project is to develop the visual servoing system with 5d.o.f robot manipulator. For this, we developed robot manipulator by using 5 serial RC motors and the visual system is also developed by using low cost USB CCD camera. RISC MPU ATMEGA128 is main controller MPU for the robot manipulator. To control the manipulator Kinematics was analyzed and GUI, API for vision system also were developed.