• Title/Summary/Keyword: 실시간 매핑 시스템

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Ship Detection Based on Video Using Background Estimation (배경 추정을 이용한 영상기반 선박검출)

  • Kim, Hyun-Tae;Lee, Keun-Hu;Park, Jang-Sik;Yu, Yun-Sik
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2010.10a
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    • pp.271-273
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    • 2010
  • In this paper, we propose ship detection system which is co-operated with AIS by using background estimation based on image processing for on the sea or harbor image extracted from camera. We experiment with on the sea or harbor image extracted from real-time input image from camera. By computer simulation and real world test, the proposed system show more effective to ship monitoring.

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A Implementation of Real-Time IP Address-Location Mapping System for LBS on High-Speed Internet (초고속 인터넷상에서 위치기반 서비스를 위한 실시간 IP/위치 매핑 시스템 구현)

  • Kim, Min-Kyung;Baek, Gyu-Tae
    • 한국정보통신설비학회:학술대회논문집
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    • 2005.08a
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    • pp.10-15
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    • 2005
  • In the area of mobile communication, Location Based Services (LBS) using the location of mobile terminal to provide their services are rapidly spreading as communication network and terminal evolves. Despite the LBS are highly demanded in high speed internet area, the services are very rare due to the difficulty locating terminals. In this paper, we propose the method to locate terminals in real time and describe its implementation system. The proposed system is designed to collect the information in real time for more than a terminal connecting internet. And, the system shows high performancecollecting and generating location information through simulation tests.

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A Multi-Stream Buffering System for Efficient Transmission Transfer (효율적 멀티미디어 전송을 위한 다중 스트림 버퍼링 시스템)

  • 김현태;김형진;이경근;나인호
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 1998.05a
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    • pp.233-237
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    • 1998
  • 다중의 연속 미디어 데이타를 출력 마감시간(playout deadline)전에 검색 및 전송하여 자연스럽게 처리하기 위한 가장 효율적인 처리방안은 메모리 버퍼를 이용하는 것이다. 본 논문에서는 다중 스트림의 데이타 전송 요구 및 해제시의 버퍼 상태를 파악하여 버퍼를 동적으로 할당하고 물리작인 버퍼를 윈도우 크기의 논리버퍼로 분할하여 동적으로 관리하는 매핑관리자를 설계하여 버퍼이용률을 높일 수 있는 방안을 제시하였다. 또한, 서로 다른 소비율로 발생된 여분의 버퍼 공간을 활용할 수 있는 지능적인 선반입 기법과 마감시간을 고려한 전송 스케줄링 기법을 통해 실시간에 동기식으로 다중 미디어 스트림을 전송할 수 있는 동적 버퍼 관리 기법을 제안하였다. 마지막으로, 버퍼의 이용율을 높이기 위해 입출력 주기에 따라 버퍼 공간을 여러 스트림들이 파이프라이닝 방식으로 버퍼를 공유하는 기법과 잔여 버퍼공간의 할당 여부를 결정하기 위한 수락제어 기법을 적용하였다.

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Detection of Direction Indicators on Road Surfaces Using Inverse Perspective Mapping and NN (원근투영법과 신경망을 이용한 도로노면 방향지시기호 검출 연구)

  • Kim, Jong Bae
    • KIPS Transactions on Software and Data Engineering
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    • v.4 no.4
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    • pp.201-208
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    • 2015
  • This paper proposes a method for detecting the direction indicator shown in the road surface efficiently from the black box system installed on the vehicle. In the proposed method, the direction indicators are detected by inverse perspective mapping(IPM) and bag of visual features(BOF)-based NN classifier. In order to apply the proposed method to real-time environments, the candidated regions of direction indicator in an image only performs IPM, and BOF-based NN is used for the classification of feature information from direction indicators. The results of applying the proposed method to the road surface direction indicators detection and recognition, the detection accuracy was presented at least about 89%, and the method presents a relatively high detection rate in the various road conditions. Thus it can be seen that the proposed method is applied to safe driving support systems available.

Emotional Palette: Mapping Affective User experience Elements based on Trend (Emotional Palette: Trend에 따른 감성적 사용자 경험 요소 매핑)

  • Jeon, Myoung-Hoon;Lee, Ju-Hwan;Yang, Jung-Min;Heo, U-Beom;Lim, Tae-Hoon;Ahn, Jung-Hee;Kim, Jin
    • 한국HCI학회:학술대회논문집
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    • 2008.02b
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    • pp.451-455
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    • 2008
  • Emotional design gets more and more important. However, the systematical approaches to integration of user experience elements in product design have been rarely tried. This study consists of three parts. We extracted affective words fitting to design direction based on trend analysis. Then, user experience elements were matched with affective words. Finally, a prototype system was made to guide designing affective factors in electronic products. In the present study, user experience elements were defined as color, material & finishing, and sound. Through various documents analysis and trend analysis, trend analysis experts and user experience designers extracted 31 affective keywords which could fully reflect current trend. After paired-comparison of selected keywords, 2 sensibility dimensions were obtained by multidimensional scaling. Trend affective keywords could be explained by 2 dimensions of human-centered' vs. 'techno-centered' and 'warm vs. cool'. Next, user experience elements stimuli were matched with each keyword by user direct positioning on the 2 dimensions affective map. Based on the result of the experiment, the prototype system was developed for the product designers. The results of the current study could guide designers to design emotionally satisfactory products.

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High Performance Reflection Effect Processing for Moving Pictures in 3 Dimensional Graphics (3차원 그래픽스의 동영상에 대한 반사 효과의 고속처리)

  • Lee, Seung-Hee;Lee, Keon-Myung
    • Journal of the Korean Institute of Intelligent Systems
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    • v.19 no.3
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    • pp.444-449
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    • 2009
  • With the advance of high performance computing hardware, many applications have been emerging which exploit real-time computer graphics capabilities. This paper is concerned with an effective realization method for reflection effect for the situations in which moving pictures are played in 3D computer graphics modeling world. The method determines in an geometric way the locations of the projection plan into which the playing areas of moving pictures are mapped, and then realizes the reflection effect with texture mapping. Compared with the traditional stencil buffer-based reflection method, the processing time of the proposed method does not significantly deteriorate for the models with moving pictures and reflection surfaces, and its throughput was improved by 30% at minimum and 127% at maximum for the models used in the comparative studies.

Design and Implementation of a Linux-based Message Processor to Minimize the Response-time Delay of Non-real-time Messages in Multi-core Environments (멀티코어 환경에서 비실시간 메시지의 응답시간 지연을 최소화하는 리눅스 기반 메시지 처리기의 설계 및 구현)

  • Wang, Sangho;Park, Younghun;Park, Sungyong;Kim, Seungchun;Kim, Cheolhoe;Kim, Sangjun;Jin, Cheol
    • Journal of KIISE
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    • v.44 no.2
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    • pp.115-123
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    • 2017
  • A message processor is server software that receives non-realtime messages as well as realtime messages from clients that need to be processed within a deadline. With the recent advances of micro-processor technologies and Linux, the message processor is often implemented in Linux-based multi-core servers and it is important to use cores efficiently to maximize the performance of system in multi-core environments. Numerous research efforts on a real-time scheduler for the efficient utilization of the multi-core environments have been conducted. Typically, though, they have been conducted theoretically or via simulation, making a subsequent real-system application difficult. Moreover, many Linux-based real-time schedulers can only be used in a specific Linux version, or the Linux source code needs to be modified. This paper presents the design of a Linux-based message processor for multi-core environments that maps the threads to the cores at user level. The message processor is implemented through a modification of the traditional RM algorithm that consolidates the real-time messages into certain cores using a first-fit-based bin-packing algorithm; this minimizes the response-time delay of the non-real-time messages, while guaranteeing the violation rate of the real-time messages. To compare the performances, the message processor was implemented using the two multi-core-scheduling algorithms GSN-EDF and P-FP, which are provided by the LITMUS framework. The benchmarking results show that the response-time delay of non-real-time messages in the proposed system was improved up to a maximum of 17% to 18%.

Mixed Reality Extension System Using Beam Projectors : Beyond the Sight (빔 프로젝터를 이용한 혼합현실 확장 시스템 : Beyond the Sight)

  • Kim, Jongyong;Song, J.H;Park, J.H.;Nam, J.;Yoon, Seung-Hyun;Park, Sanghun
    • Journal of the Korea Computer Graphics Society
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    • v.25 no.3
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    • pp.65-73
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    • 2019
  • Recently commercial mixed-reality devices have be launched and a variety of mixed-reality content has produced, but narrow field of view, which appear to be hardware technical limitations, are mentioned as an important issue for hindering immersion and limiting the scope of use. We propose a new innovative system that cooperate multiple beam projectors and a number of mixed reality devices. Using this technology, users can maximize immersion and minimize frustration of narrow viewing angles through 3D object rendering on background of large 2D screens. This system, named BtS (Beyond the Sight), is implemented on a client-server basis and includes the ability to calibrate between devices, share spatial coordinate systems, and synchronize real-time renderings as core modules. In this paper, each configuration module is described in detail and the possibility of its performance and application is shown through the introduction of mixed reality content case created using BtS system.

A Study on the Construction of Near-Real Time Drone Image Preprocessing System to use Drone Data in Disaster Monitoring (재난재해 분야 드론 자료 활용을 위한 준 실시간 드론 영상 전처리 시스템 구축에 관한 연구)

  • Joo, Young-Do
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.18 no.3
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    • pp.143-149
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    • 2018
  • Recently, due to the large-scale damage of natural disasters caused by global climate change, a monitoring system applying remote sensing technology is being constructed in disaster areas. Among remote sensing platforms, the drone has been actively used in the private sector due to recent technological developments, and has been applied in the disaster areas owing to advantages such as timeliness and economical efficiency. This paper deals with the development of a preprocessing system that can map the drone image data in a near-real time manner as a basis for constructing the disaster monitoring system using the drones. For the research purpose, our system is based on the SURF algorithm which is one of the computer vision technologies. This system aims to performs the desired correction through the feature point matching technique between reference images and shot images. The study area is selected as the lower part of the Gahwa River and the Daecheong dam basin. The former area has many characteristic points for matching whereas the latter area has a relatively low number of difference, so it is possible to effectively test whether the system can be applied in various environments. The results show that the accuracy of the geometric correction is 0.6m and 1.7m respectively, in both areas, and the processing time is about 30 seconds per 1 scene. This indicates that the applicability of this study may be high in disaster areas requiring timeliness. However, in case of no reference image or low-level accuracy, the results entail the limit of the decreased calibration.

Object VR-based 2.5D Virtual Textile Wearing System : Viewpoint Vector Estimation and Textile Texture Mapping (오브젝트 VR 기반 2.5D 가상 직물 착의 시스템 : 시점 벡터 추정 및 직물 텍스쳐 매핑)

  • Lee, Eun-Hwan;Kwak, No-Yoon
    • 한국HCI학회:학술대회논문집
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    • 2008.02a
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    • pp.19-26
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    • 2008
  • This paper is related to a new technology allowing a user to have a 360 degree viewpoint of the virtual wearing object, and to an object VR(Virtual Reality)-based 2D virtual textile wearing system using viewpoint vector estimation and textile texture mapping. The proposed system is characterized as capable of virtually wearing a new textile pattern selected by the user to the clothing shape section segmented from multiview 2D images of clothes model for object VR, and three-dimensionally viewing its virtual wearing appearance at a 360 degree viewpoint of the object. Regardless of color or intensity of model clothes, the proposed system is possible to virtually change the textile pattern with holding the illumination and shading properties of the selected clothing shape section, and also to quickly and easily simulate, compare, and select multiple textile pattern combinations for individual styles or entire outfits. The proposed system can provide higher practicality and easy-to-use interface, as it makes real-time processing possible in various digital environment, and creates comparatively natural and realistic virtual wearing styles, and also makes semi -automatic processing possible to reduce the manual works to a minimum. According to the proposed system, it can motivate the creative activity of the designers with simulation results on the effect of textile pattern design on the appearance of clothes without manufacturing physical clothes and, as it can help the purchasers for decision-making with them, promote B2B or B2C e-commerce.

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