• Title/Summary/Keyword: 근거리 인식

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Secure Authentication Scheme Using GPS and IDS in Beacon Environment (비콘 환경에서 GPS 기술과 IDS 기술을 이용한 안전한 인증 기법)

  • Park, GeunIl;Kim, Eun-Hwan;Lee, HeeJun;Jun, Moon-Soeg
    • Proceedings of the Korea Information Processing Society Conference
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    • 2015.10a
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    • pp.829-831
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    • 2015
  • 현재 유비쿼더스(Ubiquitous)시대의 환경에 걸맞게 무선통신 기술이 빠르게 발달 하면서 모바일 결제나 많은 서비스들을 보다 빠르고 쉽게 제공받을 수 있는 환경에 접어들었다. 이러한 환경을 제공해주는 무선 근거리 통신 기술 중 비콘은 가까운 범위 안에 있는 사용자의 위치를 찾아 광고서비스, 상황인식서비스, 결제서비스 등 많은 서비스를 제공 받을 때 비콘과 스마트폰은 간단한 인증절차를 밟는데 있어 취약하다는 문제점이 야기되고 있다. 본 논문에서는 보안이 취약한 부분을 GPS 기술과 IDS 기술을 이용하여 보다 안전한 인증을 제안한다.

Using the Beacon Tourist reminder (Beacon을 이용한 관광 알리미)

  • Bae, SeYeong;No, GyeongA;Kim, GaYeong;Choi, Jongmyung
    • Proceedings of the Korea Information Processing Society Conference
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    • 2015.10a
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    • pp.520-522
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    • 2015
  • 저전력 블루투스(BLE, Bluetooth Low Energy)를 이용해 사람이나 사물의 위치를 파악하는 근거리 무선 통신 기술을 제공한다. 과거에는 GPS로 건물 밖의 이동 데이터만 확인 가능 했다면, Beacon은 실내에서의 객체 이동 위치 데이터와 이동 경로를 측정 할 수 있는 기술이다. 본 애플리케이션에서는 BLE를 통한 비콘셀이 항시 ID를 주변으로 뿌리고, 이를 인식한 단말기가 수신한 ID를 통해 Beacon 서비스 서버에 접속하여 정보를 받는 방식으로, Beacon이 설치된 장소에서 특정 범위 안에 있는 단말기기는 Beacon 서버를 통하여 관광지의 정보 서비스를 제공한다.

3D Augmented Reality Control using Camera Device (카메라를 이용한 3D 증강현실 제어)

  • Choi, Han-Yong;Kim, Byung-Ki;Ko, Young-Woong
    • Proceedings of the Korea Information Processing Society Conference
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    • 2009.04a
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    • pp.897-900
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    • 2009
  • 증강 현실 기술이 발전함에 따라서 사용자의 편의성을 위한 객체의 제어 방식에 대한 요구 사항이 증가하고 있다. 본 논문에서는 마커가 붙어 있는 손가락의 움직임의 특징을 카메라로 포착하여 그 동작과 맞는 적절한 이벤트를 실행함으로 증강 현실 시스템을 보조해주는 기술을 제안하고 있다. 제안하는 방식의 가장 큰 장점은 카메라가 인식할 수 있는 정도까지의 근거리에서 3D 객체나 웹 화면을 사용자가 원하는 대로 제어하는 작업을 수행할 수 있도록 한 것이다. 핵심적인 프로토타입을 구현하여 손가락 움직임에 대하여 객체 제어가 되는지 실험을 하였으며 저속으로 움직이는 경우에 대부분 처리가 가능함을 알 수 있었다. 손가락의 모양이 빠르게 변화하는 경우에는 이벤트 처리에 오류가 많이 발생하였다.

Lifetime test of batteries for BLE modules for site identification of vessel's crews and passengers (SIVCP) (SIVCP용 BLE 모듈의 배터리 수명시험)

  • Kwon, Hyuk-joo;Kim, Min-Gwon;Kim, Yoon-Sik;Lee, Sung-Geun
    • Journal of Advanced Marine Engineering and Technology
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    • v.39 no.7
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    • pp.754-759
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    • 2015
  • Nowadays, short distance communication systems with low power energy (LPE) are developed for identification and monitoring of site identification of vessel crews and passengers (SIVCP). LPE communication modules, such as Bluetooth low energy (BLE) and Zigbee, are used for short distance communications with LPE. These modules enable 1:N communications and their popularity is growing since the modules can be mounted on movable objects, such as mobile devices and human body. When these modules are used, the important factor that affects their operation time and design are the capacity and size of battery. Therefore, they must be made as small as possible, and the battery should be selected to be slightly smaller than the module. In this study, we calculate the theoretical life of batteries used in SIVCP BLE modules using data sheet and discharge characteristic graph under the condition of a 1/250 transmission-ratio (TR). We thus calculate experimental life by measuring transmission current for the same TR, and low speed mode current for a 1/5000 TR and measure long-term experimental life using 1/25 TR for days. Through these experiments, we verify experimental methods for the prediction and extension of battery life that would enable us to select appropriate sizes of batteries based on vessel usage and passenger types. The selections of the module TR and battery size are important factors affecting the cost reduction of module design, the battery maintenance, and passenger convenience.

A Research of Factors Affecting LiDAR's Detection on Road Signs: Focus on Shape and Height of Road Sign (도로표지에 대한 LiDAR 검지영향요인 연구: 도로표지의 모양과 높이를 중심으로)

  • Kim, Ji yoon;Park, Bum jin
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.21 no.4
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    • pp.190-211
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    • 2022
  • This study investigated the effect of the shape and height of road signs on detection performance when detecting road signs with LiDAR, which is recognized as an essential sensor for autonomous vehicles. For the study, four types of road signs with the same area and material and different shapes were produced, and a road driving test was performed by installing a 32Ch rotating LiDAR on the upper part of the vehicle. As a result of comparing the shape of the point cloud and the NPC according to the shape of the road sign, It is expected that a distance of less than 40m is required to recognize the overall shape of a road sign using 32Ch LiDAR, and shapes such as triangles and rectangles are more advantageous than squares in securing the maximum point cloud from a long distance. As a result of the study according to the height of the road sign, At short distances (within 20m), if the height of the sign is raised to more than 2m, it deviates from the vertical viewing angle of the LiDAR and cannot express the complete point cloud shape. However, it showed a negligible effect compared to the near-field height change. These research results are expected to be utilized in the development of road facilities dedicated to LiDAR for the commercialization of autonomous cooperative driving technology.

Improvement of Indoor Positioning Accuracy using Smart LED System Implementation (스마트 LED 시스템을 이용한 실내위치인식 정밀도 개선)

  • Lee, Dong Su;Huh, Hyeong Seok
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.22 no.1
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    • pp.786-791
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    • 2021
  • In this paper, in order to minimize limitations such as signal interference and positioning errors in existing indoor positioning systems, a smart LED-based positioning system for excellent line-of-sight radio environments and precise location tracking is proposed to improve accuracy. An IEEE 802.4 Zigbee module is mounted on the SMPS board of a smart LED; RSSI and LQI signals are received from a moving tag, and the system is configured to transmit the measured data to the positioning server through a gateway. For the experiment, the necessary hardware, such as the gateway and the smart LED module, were separately designed, and the experiment was conducted after configuring the system in an external field office. The positioning error was within 70cm as a result of performing complex calculations in the positioning server after transmitting a vector value of the moving object obtained from the direction sensor, together with a signal from the moving object received by the smart LED. The result is a significantly improved positioning error, compared to an existing short-range wireless communications-based system, and shows the level at which commercial products can be implemented.

Evaluating and Categorizing Brand Assets of Full-Service Carriers and Low-Cost Carriers (대형항공사와 저비용항공사의 브랜드 자산 평가와 유형화)

  • Jeong, Seung-Hwa
    • The Journal of the Korea Contents Association
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    • v.21 no.8
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    • pp.442-454
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    • 2021
  • Many domestic and international airlines that experienced dramatic recession due to COVID-19 pandemic are carefully being ready to normalise operations as a number of governments has begun to vaccinate for COVID-19. So with the same market share from domestic to short distant international services, the competition between Full Service Carriers (FSC) and low cost carriers (LCC) is anticipated to be more intensive. To explore the concepts such as the perception, value, attitude and faith of the object, this study implements Q methodology proposed to complement the limitations of quantitative and qualitative research methodology. As a result, the consumers of airlines' brand are divided into three types - the type of utility seeking, value-oriented and task-related. Using Q samples which consist of 25 statements, this study specifically approached the traits of each type by observing the subjectivity with the comparative P sample group that is made up for 20 participants. By discovering the type of FSC and LCC's brand asset and comparing the recognition of consumers, not only does this study evoke the need for a strategic direction of the effective management of Airlines' Brand asset but also have a signification in the way that especially provide hypotheses for follow up studies.

Tracking and Detection of Face Region in Long Distance Image (실시간 원거리 얼굴영역 검출 및 추적)

  • Park, Sung-Jin;Han, Sang-Il;Cha, Hyung-Tai
    • Proceedings of the Korea Institute of Convergence Signal Processing
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    • 2005.11a
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    • pp.201-204
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    • 2005
  • 동영상에서 얼굴을 인식하는 기술은 Eigen-Face를 이용하는 방법, 템플릿을 이용하는 방법 등과 같이 다양한 방법이 연구되어지고 있다. 하지만 이들 기법들이 모두 동영상에서 얼굴영역을 검출했을지는 모르지만 얼굴영역이 영상에서 차지하는 위치와 크기를 일정하게 제한하고 있다. 그 중에서 입력되는 영상이 촬영 도구로부터 제한된 거리에서 촬영되어 얻어 지거나 실험을 통해 얻어진 영상을 이용하여 얼굴영역을 검출한다. 하지만 실제 다양한 응용분야에서 얼굴영역 검출 기술을 이용하기 위해서는 이러한 제한된 입력 영상뿐만이 아니라 어떠한 환경에서의 입력 영상에서도 얼굴영역을 검출할 수 있어야 한다. 본 논문은 근거리뿐만이 아니라 원거리에서 획득한 영상에서도 얼굴영역을 검출할 수 있으며, 얼굴의 특징 추출과 예측기법을 통하여 보다 향상된 얼굴영역 검출을 할 수 있다. 움직임 정보와 얼굴색상정보를 이용하여 8x8블록을 만들고 이런 블록 정보들을 특정한 규칙에 적용함으로써 얼굴영역을 후보를 검출하게 된다. 그리고 후보 얼굴영역의 고유한 특징들을 추출하고 칼만 필터를 적용한 예측기법을 통하여 얼굴영역 판단하게 된다.

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Tourism Information System using Geofencing and NFC Technology (지오펜싱과 NFC 기술을 이용한 관광 안내 시스템)

  • Park, Yang-Jae
    • Journal of Digital Convergence
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    • v.12 no.8
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    • pp.211-217
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    • 2014
  • In this paper, by using geofencing technology to set the area you want to move tourists. Geofence set of tourists in the region enters the smartphone by sending e-mail or SMS alarm to display a detailed map of the area to visit assistance. When you arrive at the destination of the museum exhibits or exhibits to the NFC tag attached to each corresponding to a web server for a detailed description of the exhibits from the get-down. Multimedia content using an existing exhibits described. Media of exhibition space and the interaction between the visitors tour guide system capable was built.

The Design of Underground Utilities Management System based on Mobile Augmented Reality Technology (모바일 증강현실 기술을 이용한 지하 사회 기반 시설 관리 시스템 설계)

  • Baek, Jang-Mi;Hong, In-Sik
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.13 no.1
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    • pp.41-47
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    • 2013
  • A great number of people all over the world are using smart phones. Researchers develop innovative technology of App. It's make rapid progress now that the country's infrastructure is computerized, we expect IT Technological Convergence. In this paper, designs underground utilities management system based on mobile augmented reality technology, and architecture configuration, interface development. Proposal system minimizes overhead of smart devices belonging to engineer's representative using wireless personal area networks. Center Server technology manages transmitted data from engineer's representative, it monitors client data path. And it provies information processing capacity for event generation module. Such event has connotations of instability and uncertainty.