• Title/Summary/Keyword: 공간 영상

Search Result 5,093, Processing Time 0.026 seconds

Head Tracker System Using Two Infrared Cameras (두 대의 적외선 카메라를 이용한 헤드 트랙커 시스템)

  • 홍석기;박찬국
    • Journal of the Korean Society for Aeronautical & Space Sciences
    • /
    • v.34 no.5
    • /
    • pp.81-87
    • /
    • 2006
  • In this paper, an experimental optical head tracker system is designed and constructed. The system is composed of the infrared LEDs and two infrared CCD cameras to filter out the interference of another light in the limited environment like the cockpit. Then the optical head tracker algorithm is designed by using the feature detection algorithm and the 3D motion estimation algorithm. The feature detection algorithm, used to obtain the 2D position coordinates of the features on the image plane, is implemented by using the thresholding and the masking techniques. The 3D motion estimation algorithm which estimates the motion of a pilot's head is implemented by using the extended Kalman filter (EKF). Also, we used the precise rate table to verify the performance of the experimental optical head tracker system and compared the rotational performance of this system with the inertial sensor.

Bubble Popping Augmented Reality System Using a Vibro-Tactile Haptic Mouse (진동촉각 햅틱 마우스 기반 버블포핑 증강현실 시스템)

  • Jung, Da-Un;Lee, Woo-Keun;Jang, Seong-Eun;Kim, Man-Bae
    • Journal of Broadcast Engineering
    • /
    • v.15 no.6
    • /
    • pp.715-722
    • /
    • 2010
  • As one of applications in augmented realities, this paper presents a bubble popping system utilizing a haptic vibro-tactile mouse. In this system, virtual bubbles randomly float in the 3D space. By using the vibro-tactile mouse grabbed by a user, the bubbles are popped when they are touched by the mouse in the 3D space. Then a bubble popping effect with addition mouse vibration is delivered to the user's hand through the mouse. The proposed system is developed on ARToolkit environment. Therefore, basic components such as a camera and a marker pattern are required. The systems is composed of a vibro-haptic mouse, a webcam, a marker pattern, a graphic bubble object, and graphic mouse. Mouse vibration as well as bubble fade-out effect is delivered. Therefore, the combination of visual and tactile bubble popping effects outperforms the usage of a single effect in the experience of augmented reality.

Perceptual Quality-based Video Coding with Foveated Contrast Sensitivity (Foveated Contrast Sensitivity를 이용한 인지품질 기반 비디오 코딩)

  • Ryu, Jiwoo;Sim, Donggyu
    • Journal of Broadcast Engineering
    • /
    • v.19 no.4
    • /
    • pp.468-477
    • /
    • 2014
  • This paper proposes a novel perceptual quality-based (PQ-based) video coding method with foveated contrast sensitivity (FCS). Conventional methods on PQ-based video coding with FCS achieve minimum loss on perceptual quality of compressed video by exploiting the property of human visual system (HVS), that is, its sensitivity differs by the spatial frequency of visual stimuli. On the other hand, PQ-based video coding with foveated masking (FM) exploits the difference of the sensitivity of the HVS between the central vision and the peripheral vision. In this study, a novel FCS model is proposed which considers both the conventional DCT-based JND model and the FM model. Psychological study is conducted to construct the proposed FCS model, and the proposed model is applied to PQ-based video coding algorithm implemented on HM10.0 reference software. Experimental results show that the proposed method decreases bitrate by the average of 10% without loss on the perceptual quality.

Entrepreneur Speech and User Comments: Focusing on YouTube Contents (기업가 연설문의 주제와 시청자 댓글 간의 관계 분석: 유튜브 콘텐츠를 중심으로)

  • Kim, Sungbum;Lee, Junghwan
    • The Journal of the Korea Contents Association
    • /
    • v.20 no.5
    • /
    • pp.513-524
    • /
    • 2020
  • Recently, YouTube's growth started drawing attention. YouTube is not only a content-consumption channel but also provides a space for consumers to express their intention. Consumers share their opinions on YouTube through comments. The study focuses on the text of global entrepreneurs' speeches and the comments in response to those speeches on YouTube. A content analysis was conducted for each speech and comment using the text mining software Leximancer. We analyzed the theme of each entrepreneurial speech and derived topics related to the propensity and characteristics of individual entrepreneurs. In the comments, we found the theme of money, work and need to be common regardless of the content of each speech. Talking into account the different lengths of text, we additionally performed a Prominence Index analysis. We derived time, future, better, best, change, life, business, and need as common keywords for speech contents and viewer comments. Users who watched an entrepreneur's speech on YouTube responded equally to the topics of life, time, future, customer needs, and positive change.

A Web-based Microcontroller Remote Laboratory for Sharing Resources (자원공유를 위한 웹기반 마이크로콘트롤러 원격 실험실)

  • Moon, Il-Hyeon;Han, Sae-Ron;Cho, Kwan-Sun;Ahn, Dal;Lim, Jong-Sik;Jeon, Heung-Gu
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.9 no.5
    • /
    • pp.1184-1192
    • /
    • 2008
  • There have been a large number of trials of the experimental education in engineering using virtual laboratories implemented in virtual space, namely on the Web. Although virtual education is regarded as an effective educational means that overcomes the limit of time and space and bring high teaming effects, the problem of lack of reality must be solved. The present study proposed and implemented a real-time remote laboratory as a solution for the problem of lack of reality in virtual education. The remote laboratory provides functions with which learners can perform experiments by remote-controlling circuits and equipment related to experiments and practices on the Web and gets data and image information, so through it learners can make realistic experiments at any time and in any place. The remote laboratory module based on Internet open sources such as JAVA Web start technology, FTP technology and Telnet technology in server-client environment can be implemented at low cost, and is effectively applicable to engineering experiment education in various areas related to real-time hardware control.

Development of Emotion Evaluation Techniques on Kindergarten Education Contents Using Head Movement Analysis (머리중심점 움직임 분석을 통한 유치원교육콘텐츠의 감성유발 평가기술 개발)

  • Kim, Jonghwa;Kim, Songyi;Cha, Yesool;Kang, Eunhye;Kim, Jinman;Choi, Yujeong;Park, Byoungha;Kim, Yongsung;Kim, Seong-Dong;Park, Youngchoong
    • Proceedings of the Korea Contents Association Conference
    • /
    • 2015.05a
    • /
    • pp.317-318
    • /
    • 2015
  • 다감각 자극을 사용한 유치원 교육콘텐츠 서비스를 제공하기 위해 머리중심적 움직임 분석을 사용한 감성인식 기술을 개발하였다. 유치원 교육콘텐츠는 청각/후각/시각 등의 다감각 자극을 통해 교육서비스의 효과를 극대화하기 위한 목적으로 제작되었다. 본 연구에서는 다감각 자극동안 유치원생들의 감성유발을 측정하여 교육서비스 효과를 검증하는 것을 목적으로 인식기술을 개발하였다. 개발한 인식기술은 카메라를 사용하여 상단영상을 측정하고, 머리중심점 움직임을 지속적으로 측정하여 분석함으로써 유발된 감성을 인식한다. 또한 감성인식 결과는 다감각 자극을 제어하는 시스템에 전달되어 다감각 자극을 제시하기 위한 정보로 활용된다. 본 연구의 결과로 교육콘텐츠의 감성유발 결과를 평가할 수 있으며, 효과를 극대화 하기 위한 도구로써 활용가능하였다. 더욱이, 교육콘텐츠 뿐만 아니라 다양한 콘텐츠 서비스 공간에 적용하여 효과 검증 및 서비스 효과 증가에 활용될 수 있는 기술로써 가치가 있을 것으로 예상된다.

  • PDF

Gesture Interaction of Digital Frame for Visual Image Content (영상콘텐츠용 디지털액자의 제스처 인터랙션 방식)

  • Choe, Jong-Hoon
    • The Journal of the Korea Contents Association
    • /
    • v.10 no.10
    • /
    • pp.120-127
    • /
    • 2010
  • Today we always can take a picture and enjoy it anywhere and anytime with a propagation of digital camera and camera phone. Even though the amount of digital picture content produced in every day life has been increasing, the way of enjoying it was just with phones or PC monitors. A small size screen of a cell phone and a desktop monitor are not suitable environment for enjoying digital picture, so the new market for digital photo frame has been opened. Until now, various kind of digital photo frames of many manufactures have been released for several years, but they have similar interaction way each other due to the limitation of their hardware specification so don't fill the intuitive mental model that users have about the product called a photo frame. Thus, this research aims to suggest an interaction way of digital photo frame providing with better usability and emotional satisfaction according to the spatial environment that it's located and users' behaviors.

Gesture Interface for Controlling Intelligent Humanoid Robot (지능형 로봇 제어를 위한 제스처 인터페이스)

  • Bae Ki Tae;Kim Man Jin;Lee Chil Woo;Oh Jae Yong
    • Journal of Korea Multimedia Society
    • /
    • v.8 no.10
    • /
    • pp.1337-1346
    • /
    • 2005
  • In this paper, we describe an algorithm which can automatically recognize human gesture for Human-Robot interaction. In early works, many systems for recognizing human gestures work under many restricted conditions. To eliminate these restrictions, we have proposed the method that can represent 3D and 2D gesture information simultaneously, APM. This method is less sensitive to noise or appearance characteristic. First, the feature vectors are extracted using APM. The next step is constructing a gesture space by analyzing the statistical information of training images with PCA. And then, input images are compared to the model and individually symbolized to one portion of the model space. In the last step, the symbolized images are recognized with HMM as one of model gestures. The experimental results indicate that the proposed algorithm is efficient on gesture recognition, and it is very convenient to apply to humanoid robot or intelligent interface systems.

  • PDF

Application of the GPS & EDM System for 3D Orthophoto in Small Area (소규모지역에서 3차원 정사사진 구현을 위한 GPS와 EDM의 적용)

  • Choi, Hyun;Choo, Tae-Ho
    • Proceedings of the Korea Contents Association Conference
    • /
    • 2006.05a
    • /
    • pp.545-548
    • /
    • 2006
  • It's very difficult to acquire the accurate GCP(Ground Control Point) in the urban center and forest aerial photo because of occurring of irregular multi-path error. Thr purpose of this study is to apply the GPS and the EDM system for 3D orthophoto in the small areas. GCPs surveyed by accuracy triangulation from EDM after from triangulation points to a fiducial point at study area used to GPS. And I have a comment on how to use areal orthophoto for future 3D-GIS after 3D-Modelling using areal orthophoto. As the results, EDM surveying could resolve multi-path error according to GPS surveying and It is possible for using aerial orthophoto on the basis of the 3D-GIS database.

  • PDF

Surveillance System Using Person Tracking in Mobile Platform (모바일 플랫폼 기반의 사람 추적 감시시스템)

  • Lee, Kyoung-Mi;Lee, Youn-Mi
    • The Journal of the Korea Contents Association
    • /
    • v.7 no.8
    • /
    • pp.94-101
    • /
    • 2007
  • In this paper, we propose a surveillance system using multi-person tracking in a WIPI based mobile system, which is the standard wireless internet platform. The proposed system consists of two subsystems: the person tracking system and the mobile information transmission system. The person tracking system tracks persons who invade security and the mobile information transmission system sends the tracking results from the person tracking system to the user's mobile phone. In this paper, the person tracking system tracks persons who appear on many cameras with non-overlapping views in order to achieve a wider view. The mobile information transmission system saves automatically tracked data to the owner's web server and transmits the saved data to the user's WIPI mobile phone. Therefore, whenever the user wishes to view tracked data later, the mobile system can provide the user with the tracking results by either the user selecting particular cameras or the time on the owner's mobile phone. The proposed system is a new surveillance system that transfers tracked data among cameras to the user's mobile phone in order to overcome space limitations in tracking areas and monitoring areas and spatial limitations in monitoring hours.