• Title/Summary/Keyword: Viewing distance

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Electrical Properties of Polyaniline Blends (폴리아닐린 블랜드의 전기적 특성)

  • Kim, Won-Jung;Kim, Yun-Sang;Kim, Tae-Young;Kim, Jong-Eun;Suh, Kwang-S.
    • Proceedings of the KIEE Conference
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    • 2003.10a
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    • pp.95-97
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    • 2003
  • This paper describes electrical properties such as electrical conduction characteristics and space charge distributions of polyaniline/polystyrene conducting blends. It is interesting to note that the charging current decreased as the temperature was elevated when DC voltage was applied, and also the hopping distance decreased with the increase of temperature for the PANI/HIPS blends, while generally, the hopping distance decreases as the charging current increases. It is exposed that this result is opposed to widely known phenomenon. It could be examined viewing space charge distributions by a pulsed electroacoustic (PEA) method.

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A study on compensation of distorted 3D depth in the triple fresnel lenses floating image system

  • Lee, Kwnag-Hoon;Kim, Soo-Ho;Yoon, Young-Soo;Kim, Sung-Kyu
    • 한국정보디스플레이학회:학술대회논문집
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    • 2007.08b
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    • pp.1490-1493
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    • 2007
  • We proposed the method to take 3D image having correct depths to the front and rear directions when the stereogram was displayed to an observer through an optical system. Since the magnified stereogram by lenses was not given correct depth to an observer despite having the same magnified disparity. Consequently, we achieved our goal by relations of compensated disparities to both directions with magnification of lenses, viewing distance and base distance of viewer in AFIS.

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The Elderly's Error Characteristics in Some Human Interactions (자극에 대한 상호작용 관점에서의 노인의 오류 특성)

  • Jung, Kwang-Tae
    • Journal of the Ergonomics Society of Korea
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    • v.30 no.1
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    • pp.109-115
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    • 2011
  • In this research, three topics were studied for the elderly. The first was the elderly's error characteristics for tracing task and the second was for depth perception. The characteristics were compared with the young's. Twenty two old people and twenty two young people participated in the tracing experiment, respectively. In the depth perception experiment, twenty three old people and twenty two young people participated. A depth perception apparatus and a tracing one were used in the experiment. In the depth perception error, a significant difference was not detected on gender. However significant differences were detected with age and viewing distance. In the tracing error, significant difference was detected with age, also. The third experiment was push-button operation and fifteen old people participated in the experiment. As the result, operation time error was increased with the button size and the moving distance. The result of this study will be able to be considered in its user interface design to reduce the elderly's error while using a product.

A study on the analysis technique of visual information by GIS (GIS를 이용한 가시권정보 분석기법에 관한 연구 -제주 산방산 지역 사례연구-)

  • 최기만;이춘석;임승빈
    • Journal of the Korean Institute of Landscape Architecture
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    • v.25 no.2
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    • pp.31-42
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    • 1997
  • Visibility has been used for Visual Impact Assessment and Buildingheight Control. The purpose of this study is to elaborate visibility analysis technique in GIS, and to design a visual information system baed on this technique for diverse application. The results of this study are as follows : 1) By classifying visibility analysis techniques into two groups, Each one's merits and demerits were investigated. Practically GIS visibility analysis by DTM model using contour map and investigating it by means of site-observation can be the most effective method. 2) A visibility analysis techniquwe for V.I.A. and B.H.C. was presented by studying GIS visibility analysis by means of DTM model using contour map. There were 5 problems. 3) Adequate analysis techniques were presented according to the landscape factor-road, ship-route, port, mountain, etc. 4) Viewing distance from road and ship-route in visual corridor, landma가 visibility and distance, the angle of incidence and invisible region's depth are helpful for land scape management or land use planning.

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Estimating Location in Real-world of a Observer for Adaptive Parallax Barrier (적응적 패럴랙스 베리어를 위한 사용자 위치 추적 방법)

  • Kang, Seok-Hoon
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.23 no.12
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    • pp.1492-1499
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    • 2019
  • This paper propose how to track the position of the observer to control the viewing zone using an adaptive parallax barrier. The pose is estimated using a Constrained Local Model based on the shape model and Landmark for robust eye-distance measurement in the face pose. Camera's correlation converts distance and horizontal location to centimeter. The pixel pitch of the adaptive parallax barrier is adjusted according to the position of the observer's eyes, and the barrier is moved to adjust the viewing area. This paper propose a method for tracking the observer in the range of 60cm to 490cm, and measure the error, measurable range, and fps according to the resolution of the camera image. As a result, the observer can be measured within the absolute error range of 3.1642cm on average, and it was able to measure about 278cm at 320×240, about 488cm at 640×480, and about 493cm at 1280×960 depending on the resolution of the image.

Implementation of Integrated Player System based on Free-Viewpoint Video Service according to User Selection (사용자 선택에 따른 자유 시점 비디오 서비스 기반의 통합 플레이어 시스템 구현)

  • Yang, Ji-hee;Song, Min-ki;Park, Gooman
    • Journal of Broadcast Engineering
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    • v.25 no.2
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    • pp.265-274
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    • 2020
  • Free-viewpoint video service is a technology that allows users to watch at any angle, location and distance through interaction. In this paper, the free-viewpoint video services are defined in four viewing modes: Inward view, outward view, 3D object view and first person view. And we developed and implemented a new integrated program that plays all the suggested views. In the contents of girl band performances and basketball games, multi-view cameras suitable for each viewing mode are installed to acquire media, and data stored on the server is streamed over the network, making it available for viewing. Users can freely choose four viewing modes, space location, angle and so on, and the media data such as images and sounds are provided to them by rendering appropriately for the selected the viewpoint. Our system is expected to be a scalable free-viewpoint video service player as well as provide users with immersion and presence by combining various viewing modes.

Feasibility Study on Ultrasonic Waveguide Sensor for Under-Sodium Viewing of Reactor Internals in Sodium-Cooled Fast Reactor (소듐냉각고속로 원자로 내부구조물의 소듐내부가시화를 위한 웨이브가이드 초음파센서의 적용 가능성 연구)

  • Joo, Young-Sang;Lim, Sa-Hoe;Park, Chang-Gyu;Lee, Jae-Han
    • Journal of the Korean Society for Nondestructive Testing
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    • v.28 no.4
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    • pp.364-371
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    • 2008
  • Ultrasonic waveguide sensor has been developed for under-sodium viewing of reactor internal structures of a sodium-cooled fast reactor (SFR). The structure design concept of a waveguide sensor assembly was suggested and evaluated for the application in SFR. A 10 m long ultrasonic waveguide sensor assembly has been manufactured and the experimental feasibility tests were carried out. The 10 m long distance propagation performance of zero-order antisymmetric $A_0$ Lamb wave has been verified. The feasibility of ultrasonic waveguide sensor has been demonstrated by the C-scanning resolution performance test.

Personalized Recommendation System for IPTV using Ontology and K-medoids (IPTV환경에서 온톨로지와 k-medoids기법을 이용한 개인화 시스템)

  • Yun, Byeong-Dae;Kim, Jong-Woo;Cho, Yong-Seok;Kang, Sang-Gil
    • Journal of Intelligence and Information Systems
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    • v.16 no.3
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    • pp.147-161
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    • 2010
  • As broadcasting and communication are converged recently, communication is jointed to TV. TV viewing has brought about many changes. The IPTV (Internet Protocol Television) provides information service, movie contents, broadcast, etc. through internet with live programs + VOD (Video on demand) jointed. Using communication network, it becomes an issue of new business. In addition, new technical issues have been created by imaging technology for the service, networking technology without video cuts, security technologies to protect copyright, etc. Through this IPTV network, users can watch their desired programs when they want. However, IPTV has difficulties in search approach, menu approach, or finding programs. Menu approach spends a lot of time in approaching programs desired. Search approach can't be found when title, genre, name of actors, etc. are not known. In addition, inserting letters through remote control have problems. However, the bigger problem is that many times users are not usually ware of the services they use. Thus, to resolve difficulties when selecting VOD service in IPTV, a personalized service is recommended, which enhance users' satisfaction and use your time, efficiently. This paper provides appropriate programs which are fit to individuals not to save time in order to solve IPTV's shortcomings through filtering and recommendation-related system. The proposed recommendation system collects TV program information, the user's preferred program genres and detailed genre, channel, watching program, and information on viewing time based on individual records of watching IPTV. To look for these kinds of similarities, similarities can be compared by using ontology for TV programs. The reason to use these is because the distance of program can be measured by the similarity comparison. TV program ontology we are using is one extracted from TV-Anytime metadata which represents semantic nature. Also, ontology expresses the contents and features in figures. Through world net, vocabulary similarity is determined. All the words described on the programs are expanded into upper and lower classes for word similarity decision. The average of described key words was measured. The criterion of distance calculated ties similar programs through K-medoids dividing method. K-medoids dividing method is a dividing way to divide classified groups into ones with similar characteristics. This K-medoids method sets K-unit representative objects. Here, distance from representative object sets temporary distance and colonize it. Through algorithm, when the initial n-unit objects are tried to be divided into K-units. The optimal object must be found through repeated trials after selecting representative object temporarily. Through this course, similar programs must be colonized. Selecting programs through group analysis, weight should be given to the recommendation. The way to provide weight with recommendation is as the follows. When each group recommends programs, similar programs near representative objects will be recommended to users. The formula to calculate the distance is same as measure similar distance. It will be a basic figure which determines the rankings of recommended programs. Weight is used to calculate the number of watching lists. As the more programs are, the higher weight will be loaded. This is defined as cluster weight. Through this, sub-TV programs which are representative of the groups must be selected. The final TV programs ranks must be determined. However, the group-representative TV programs include errors. Therefore, weights must be added to TV program viewing preference. They must determine the finalranks.Based on this, our customers prefer proposed to recommend contents. So, based on the proposed method this paper suggested, experiment was carried out in controlled environment. Through experiment, the superiority of the proposed method is shown, compared to existing ways.

Analysis on the Surface Luminance of Outdoor Lighting by Viewing Distance (경관조명의 시점거리별 표면휘도 특성분식)

  • Choi, Yoon-Seok;Jeong, In-Young;Ahn, Hyun-Tae;Kim, Jeong-Tai
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.20 no.6
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    • pp.18-25
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    • 2006
  • Existing outdoor lighting evaluation methods for the city beautification at night, the measurements are limited by one point to analyze the photometric data. However, this methods could not represent the diversity of photometric result from the distance. This study aims to propose the new outdoor lighting evaluation method of structure surface luminance in accordance with the measuring distance. For the purpose, the field measurement and simulation of an illuminated structure were conducted by CS-100, Digital Photometry Instrument ProMetric 1400, and the Lightscape v 3.2 from the distance of 100[m], 300[m], 500[m]. The result shows that evaluation of the surface luminance by the distance should be measured from about 100[m] of an illuminated object for getting the familiar result from computer simulation.

Analysis of Effects of Rational and Emotional Advertising Appeals on Products from a View of Psychological Distance : Focusing on the Eye-Tracking Method (제품에 대한 심리적 거리감에 따른 이성적, 감성적 광고소구의 효과분석: 아이트래킹 방법을 중심으로)

  • Kang, Chang Min;Lee, Kun Chang
    • Journal of Digital Convergence
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    • v.17 no.11
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    • pp.97-104
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    • 2019
  • Consumers possess their own psychological distance towards products. Based on the construal-level theory, this study aims to analyze which type of advertising appeal is more effective according to psychological distance. Also this study conducts neurophysiology experiment through eye-tracker. By using eye-tracking methods, participants' responses to products was measured and analyzed accordingly. Results revealed that consumers prefer rational appeals when the psychological distance is perceived near, while emotional appeals are preferred when the psychological distance is perceived far. In addition, eye movements measured in Visit Count(VC), Fixation Count(FC), and Total Fixation Duration(TFD) showed significant difference when participants are viewing preferred and non-preferred appeals.