• 한국인터넷방송통신학회논문지
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• 제9권1호
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• pp.53-59
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• 2009

다시점 비디오는 데이터 양이 매우 많아서 이를 효과적으로 저장하고 전송하기 위해서는 새로운 압축 부호화의 기술 개발이 필수적이다. 계층적 깊이 영상은 다시점 비디오를 효과적으로 부호화할 수 있는 방법으로 여러 시점의 컬러와 깊이 영상을 합성하여 하나의 데이터 구조로 만든 것이다. 본 논문에서는 실제 거리비교, 오버랩 문제해결, 보간법을 이용한 효율적인 계층적 깊이 영상 표현을 통해서 다시점 영상에 대한 압축 효율을 향상시키는 방법을 제안 하였다. 실험 결과를 통해서 압축 성능 향상을 얻을 수 있었다.

• KIEAE Journal
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• 제10권2호
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• pp.25-30
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• 2010

The daylited space can improve visual comfort and occupant's well-being. However discomfort glare from the daylight is a common problem in indoor environments and in general, the window is the main glare sources. Some formulas have been proposed for predicting glare from the daylight, however, they do not consider the effect on glare of the view through a window and some studies proved that they are inadequate in real daylight situation. This research aims to identify the relationship between view and discomfort glare considering the subjective impressions. As a preliminary experiment, this paper sets up the experimental protocol to reveal relationships between views from a window and visual perception in a controlled laboratory experiment. $1.2m{\times}1.2m$ artificial window was developed and $0.9m{\times}0.9m$ view image was placed on the window. Discomfort glare and impression evaluation was carried out under four different views and one blank view as a reference condition. The results showed that the subjects evaluated discomfort glare differently with the views even under the same luminance conditions and tended to feel less glare with distance views compared to near views.

• 한국통신학회논문지
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• 제34권2C호
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• pp.186-193
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• 2009

다시점 비디오는 데이터 양이 매우 많아서 이를 효과적으로 저장하고 전송하기 위해서는 새로운 압축 부호화의 기술 개발이 필수적이다. 계층적 깊이 영상은 다시점 비디오를 효과적으로 부호화할 수 있는 방법으로 여러 시점의 컬러와 깊이 영상을 합성하여 하나의 데이터 구조로 만든 것이다. 본 논문에서는 실제 거리비교, 오버랩 문제해결, YCrCb 컬러변환을 이용한 효율적인 계층적 깊이 영상 표현을 통해서 다시점 영상에 대한 압축 효율을 향상시키는 방법을 제안하였다. 실험 결과를 통해서 압축성능 향상과 우수한 복원 성능을 얻을 수 있었다.

• ETRI Journal
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• 제45권2호
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• pp.291-303
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• 2023

Selfies are a popular form of photography. However, due to physical constraints, the compositions of selfies are limited. We present algorithms for creating virtual portraits with interesting compositions from a set of selfies. The selfies are taken at the same location while the user spins around. The scene is analyzed using multiple selfies to determine the locations of the camera, subject, and background. Then, a view from a virtual camera is synthesized. We present two use cases. After rearranging the distances between the camera, subject, and background, we render a virtual view from a camera with a longer focal length. Following that, changes in perspective and lens characteristics caused by new compositions and focal lengths are simulated. Second, a virtual panoramic view with a larger field of view is rendered, with the user's image placed in a preferred location. In our experiments, virtual portraits with a wide range of focal lengths were obtained using a device equipped with a lens that has only one focal length. The rendered portraits included compositions that would be photographed with actual lenses. Our proposed algorithms can provide new use cases in which selfie compositions are not limited by a camera's focal length or distance from the camera.

• 한국주거학회논문집
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• 제12권4호
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• pp.163-171
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• 2001

The purpose of this study was to analyze the view of housing of Korean and Japanese female university students. The view of housing was investigated in four stages-housing consciousness, resident opinion, ideal housing and housing needs-in this study. The data was collected through the self-entry questionnaire designed for this study and the sample of 400 in total, 200 cases form Korea and 200 cases form Japan. The results are as follows : The major findings of the housing consciousness were that Japanese female university students preferred the detached in the future. The resident opinion of Korean and Japanese female university students showed that the group space was more important than the private space. In the ideal image, they wanted psychological and physical comfort from their houses. In the housing needs, Korean have considered the distance of friend and family and been satisfied with interior design, whereas Japanese have considered the expression of social level and been satisfied with outdoor design.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2007년도 하계학술대회 논문집
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• pp.473-475
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• 2007

This paper shows a monitoring program, and this Exploiting monitoring program is a program for real-time monitoring the current and voltage which is produced by wind generators. And this program helps to check efficiency and situation of the wind generator; therefore, it uses LabVIEW for this real-time monitoring program. It is expensive that the specific network is needed in the common LD (long distance) data transmission. So in this paper, it shows the transmission method which use ezTCP/LAN (Serial-port${\leftarrow}{\rightarrow}$LAN-port converter) and combine with the TCP/IP based on LabVIEW. And in this method the specific network is not needed for using the Internet network to transmit the data, which can reduce the application cost of the system.

• ETRI Journal
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• 제41권1호
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• pp.42-51
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• 2019

The rainbow hologram provides views of reconstruction with rainbow color within a large viewing zone. In our recent paper, a Fourier rainbow holographic display using diffraction grating and a white-light LED source was introduced. In this technique, the rainbow effect is realized by the dispersion of white-light source on diffraction grating, while the slit is implemented numerically by reducing the demands of the space-bandwidth product of the display. This paper presents a novel analysis on the visual perception of the Fourier rainbow holographic display using Wigner distribution. The view-dependent appearance of the image, including multispectral field of view and viewing zone, is investigated considering the observer and the display parameters. The resolution of the holographic view is also investigated. For this, a new quantitative assessment for image blur is introduced using Wigner distribution analysis. The analysis is supported with numerical simulations and experimentally captured optical reconstructions for the holograms of the computer model and real object generated with different slit size, reconstruction distance, and different observation conditions.

• 한국동물학회:학술대회논문집
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• 한국동물학회 1999년도 한국생물과학협회 학술발표대회
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• pp.154.1-154
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• 1999

No Abstract, See Full Text

• 한국통신학회논문지
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• 제34권11B호
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• pp.1320-1327
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• 2009

카메라 간격, 정렬 방법 그리고 검출기의 분해능은 관찰자가 재생된 입체영상의 깊이감을 인지할 시 발생하는 깊이감 왜곡의 주된 요인들이다. 스테레오 카메라를 사용하여 시차영상을 획득할 시 고려해야 할 요소는 물체거리의 변화에 따른 상거리의 변화이다. 상거리의 변화는 시차영상 내 시차량 변화를 야기하며, 재생시 관찰자에게 왜곡된 깊이감을 제공한다. 본 논문은 상거리 변화에 따른 시차영상 내 시차량 변화 및 이로부터 야기되는 깊이감 왜곡을 정량적으로 분석하여, 상거리 변화가 깊이감 왜곡을 발생시키는 또 다른 주된 요인이 될 수 있음을 증명 하는데 연구의 초점을 두었다.

• 대한임베디드공학회논문지
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• 제13권2호
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• pp.83-91
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• 2018

With the development of IT (Information Technology) technology, embedded system and network technology are combined and used in various environments such as military environment as well as everyday life. In this paper, we propose a new airdropped distributed mobility model (ADMM) modeling the dispersion falling of the direct shot of a cluster bomb, and we compare and analyze some representative MANET routing protocols in ADMM in ns-3 simulator. As a result of the analysis, we show OLSR routing protocol is promising in ADMM environment in the view points of packet delivery ratio (PDR), end to end delay, and jitter. In addition, we propose a new adaptation scheme for OLSR, AND-OLSR (Average Node Distance based adaptive-OLSR) to improve the original OLSR in ADMM environment. The new protocol calculates the average node distance, adapts the period of the control message based on the average node distance increasing rate. Through the simulation study, we show that the proposed AND-OLSR outperforms the original OLSR in PDR and control message overhead.