• Title, Summary, Keyword: unique marker

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Vision-based remote 6-DOF structural displacement monitoring system using a unique marker

  • Jeon, Haemin;Kim, Youngjae;Lee, Donghwa;Myung, Hyun
    • Smart Structures and Systems
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    • v.13 no.6
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    • pp.927-942
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    • 2014
  • Structural displacement is an important indicator for assessing structural safety. For structural displacement monitoring, vision-based displacement measurement systems have been widely developed; however, most systems estimate only 1 or 2-DOF translational displacement. To monitor the 6-DOF structural displacement with high accuracy, a vision-based displacement measurement system with a uniquely designed marker is proposed in this paper. The system is composed of a uniquely designed marker and a camera with a zooming capability, and relative translational and rotational displacement between the marker and the camera is estimated by finding a homography transformation. The novel marker is designed to make the system robust to measurement noise based on a sensitivity analysis of the conventional marker and it has been verified through Monte Carlo simulation results. The performance of the displacement estimation has been verified through two kinds of experimental tests; using a shaking table and a motorized stage. The results show that the system estimates the structural 6-DOF displacement, especially the translational displacement in Z-axis, with high accuracy in real time and is robust to measurement noise.

CEM Contextual Data Creation and Extraction Technology based on OOK of Augmented Reality (증강현실에서 OOK 기반의 CEM 맥락 데이터 생성 및 추출 기술)

  • Lee, Hye-Mi;Ryu, Nam-Hoon;Kim, Eung-Kon
    • The Journal of the Korea Contents Association
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    • v.12 no.4
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    • pp.20-30
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    • 2012
  • The biggest advantage of AR is that it allows unique experience in the real world through a virtual object. However, there is a limit in the marker techniques to do registration for the virtual object. Therefore, it is possible for a complication that only allows restrictive interaction to come up. This paper provides marker technique of the next generation which can supplement limitations of existing marker technique. Such marker is a combination of IR LED's, and is a convergence of LED VCL concepts of M2M. Environment where the user belongs to and their unique choice will be expressed into one context. Also, the context will be delivered to the system through OOK IR LED marker algorithm. Marker can be operated on the spot to change virtual objects according to the user's taste, registration can be done at the same time for several virtual objects, and control become possible.

Maker Tracking System Using Infrared Camera and Web Camera (적외선 카메라와 웹 카메라를 이용한 마커 트래킹 시스템)

  • Ko, Young-Woong;Kim, Byung-Ki;Song, Chang-Geun;Jang, Jae-Hyuck
    • Journal of KIISE:Computing Practices and Letters
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    • v.16 no.7
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    • pp.753-758
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    • 2010
  • In this paper we propose an efficient marker tracking system that exploits IR and web cameras. The proposed method solves the marker swap problem and allows for fast and responsive marker tracking. We use color information gathered from the IR reflector to assign a unique identification to each marker. We can locate each marker withthe IR camera and also identify the marker uniquely by using color information provided by the web camera. The experiment results show that marker swapping can be eliminated effectively. Furthermore, our approach allows for faster and more responsive marker tracking.

Molecular Identification of Fecal Pollution Sources in Water Supplies by Host-Specific Fecal DNA Markers and Terminal Restriction Fragment Length Polymorphism Profiles of 16S rRNA Gene

  • Jeong, Ju-Yong;Gil, Kyung-Ik;Lee, Kyong-Hee;Ka, Jong-Ok
    • Journal of Microbiology
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    • v.46 no.6
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    • pp.599-607
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    • 2008
  • Specific fecal DNA markers were investigated for major pollution sources, cow, human, and pig, and occurrence of the identified markers was analyzed in river waters using Terminal Restriction Fragment Length Polymorphism (T-RFLP) techniques and sequencing of 16S rDNA of Bacteroides-Prevotella. The unique and specific DNA markers for cow and human were identified as a 222 bp and 60 bp peak in HaeIII T-RFLP profiles, respectively, and the pig-specific marker was not identified but the unique T-RFLP profile of pig could be used as a substitution. Human-specific marker was detected in most of the river waters tested (92.1%) and T-RFLP profiles of river waters were shown to be similar to those of human feces. Cluster analysis of T-RFLP data showed that the fecal sources were multiple (human plus cow and human plus dairy cow) in most of the river waters. The phylogenetic analysis for the clones recovered from the fecal and water samples showed that the clones from cow formed a discreet cluster from those of other sources. The other clones from human, pig, and river water formed two groups all together. The results of this study could be used to identify and control the fecal pollution source in the bodies of water in Korea.

ISSR marker-assisted selection of male and female plants in a promising dioecious crop: jojoba (Simmondsia chinensis)

  • Sharma, Kuldeep;Agrawal, Veena;Gupta, Sarika;Kumar, Ravindra;Prasad, Manoj
    • Plant Biotechnology Reports
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    • v.2 no.4
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    • pp.239-243
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    • 2008
  • Simmondsia chinensis (Link) Schneider, a multipurpose and monogeneric dioecious shrub from arid zones, has emerged as a cash crop all over the globe. Its seed propagation poses severe problems due to its male-biased population: the male:female ratio is 5:1. Investigations have been carried out to generate a sex-specific Inter-simple sequence repeat (ISSR) marker for the early detection of male and female plants. Of the 42 primers analysed with a bulk sample of pooled male DNA and a bulk sample of pooled female DNA, only one primer, UBC-807, produced a unique ~1,200 base-pair fragment in the male DNA. To validate this observation, this primer was re-tested with individual male and female samples from eight cultivars. A similar unique ~1,200 bp fragment was present in the male individuals of all eight cultivars and completely absent in the female individuals tested. This is the first report of the use of ISSR markers to ascertain sex in physiologically mature S. chinensis plants.

Purity Test of Radish Hybrid Seeds Using Randomly amplified Polymorphic DNA Marker

  • Oh, Sei-myoung;Soontae Kwon
    • Journal of Life Science
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    • v.11 no.1
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    • pp.65-67
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    • 2001
  • In order to develop a rapid and simple method for testing the purity of radish hybrid seeds using a procedure based on the PCR(Polymerase chain reaction), eighty random primers were screened with the genomic DNA extracted from five day old seedlings of inbred parent lines and their F1 hybrids. Two primers, HRM-02 (5'-GAGACCAGAC-3') and HRM-19(5'-TGAGGCGTGT-3'), generate reproducible unique PCR patterns which can identify each parent lines as well as their hybrids. In actual test of randomly selected hybrid seeds using the two marker primers, the purity tested by one primer was exactly same as that of other primer. It suggests that one marker primer selected in this experiment is enough for the purity test of radish hybrid seeds. We demonstrates the use of RAPD(randomly amplified polymorphic DNAs) markers to identify each of inbred parent lines and hybrids by rapid and simple method.

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The Molecular Biological Marker in Bombyx mori and Spodoptera frugiperda Cells (Bombyx mori세포주와 Spodoptera frugiperda세포주의 분자생물학적 표식자)

  • Jin, Byeong-Rae;Je, Yeon-Ho;Gang, Seok-Gwon
    • Journal of Sericultural and Entomological Science
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    • v.38 no.1
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    • pp.53-56
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    • 1996
  • To investigate the molecular biological marker in insect cells, BmN-4 and Sf-0 cells were analysed by SDS-PAGE and random amplification of polymorphic DNA. The results showed that the patterns of total cell protein and random amplification of polymorphic DNA were distinguished between BmN-4 and Sf-9 cells, suggesting that the unique major bands were useful as molecular biological marker in BmN-4 and Sf-9 cells.

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Detection of DNA Fragment to Differentiate Korean Cattle

  • Yeo, J.S.;Kim, J.W.;Chang, T.K.;Nam, D.H.;Han, J.Y.;Choi, C.B.
    • Asian-Australasian Journal of Animal Sciences
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    • v.15 no.8
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    • pp.1071-1075
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    • 2002
  • In order to identify and develop the specific DNA marker for the identification of Hanwoo (Korean Cattle) from other breeds, a specific DNA marker of 519 bp was identified and sequenced from polymorphic analysis using RAPD-PCR for 6 cattle breeds. Two different repetitive sequences, $(AAC)_5$ and $(GAAGA)_2$, were selected and designed to use specific probe to develop a DNA marker for Hanwoo specific. When the $(AAC)_5$ probe was applied, the 10 kb specific DNA marker showed in the DNA fingerprinting from 237 of 281 Hanwoo individuals. This novel Hanwoo specific DNA probe is useful to perform the marker-assisted selection for screening Hanwoo purity as an unique genetic source.

TCP Throughput Guarantee using Packet Buffering (패킷 버퍼링을 이용한 TCP 처리율 보장 방법)

  • Choi, Sun-Woong;Kim, Chung-Kwon
    • Journal of KIISE:Information Networking
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    • v.28 no.2
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    • pp.242-250
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    • 2001
  • This paper deals with the TCP bandwidth guarantee problem in a differentiated serviccs(Diffserv) network. The Diffserv assured s<:rvice differentiates packet drop probabilities to guarantee the promised bandwidth even under network congestion. However a token buffer marker fails to show adequate performance because TCI' generates packets according to the unique Tel' congestion control mechanism. We propose a marker that uses a data buffer as well as a token buffer. The marker with a data buffer works well with the assured service mechanism because it smooths Tel' traffic. We showed that the marker with a data buffer achieves the target throughput better than a marker with a token buffer only. We also showed that the optimal buffer size is proportional to reserved throughput and HTT.

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Indoor Single Camera SLAM using Fiducial Markers (한 대의 카메라와 Fiducial 마커를 이용한 SLAM)

  • Lim, Hyon;Yang, Ji-Hyuck;Lee, Young-Sam;Kim, Jin-Geol
    • Journal of Institute of Control, Robotics and Systems
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    • v.15 no.4
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    • pp.353-364
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    • 2009
  • In this paper, a SLAM (Simultaneous Localization and Mapping) method using a single camera and planar fiducial markers is proposed. Fiducial markers are planar patterns that are mounted on the ceiling or wall. Each fiducial marker has a unique hi-tonal identification pattern with square outlines. It can be printed on paper to reduce cost or it can be painted using retro-reflective paint in order to make invisible and prevent undesirable visual effects. Existing localization methods using artificial landmarks have the disadvantage that landmark locations must be known a priori. In contrast, the proposed method can build a map and estimate robot location even if landmark locations are not known a priori. Hence, it reduces installation time and setup cost. The proposed method works good even when only one fiducial marker is seen at a scene. We perform computer simulation to evaluate proposed method.