• Title/Summary/Keyword: Range Detection

Search Result 3,045, Processing Time 0.031 seconds

Visual tracking based Discriminative Correlation Filter Using Target Separation and Detection

  • Lee, Jun-Haeng
    • Journal of the Korea Society of Computer and Information
    • /
    • v.22 no.12
    • /
    • pp.55-61
    • /
    • 2017
  • In this paper, we propose a novel tracking method using target separation and detection that are based on discriminative correlation filter (DCF), which is studied a lot recently. 'Retainability' is one of the most important factor of tracking. There are some factors making retainability of tracking worse. Especially, fast movement and occlusion of a target frequently occur in image data, and when it happens, it would make target lost. As a result, the tracking cannot be retained. For maintaining a robust tracking, in this paper, separation of a target is used so that normal tracking is maintained even though some part of a target is occluded. The detection algorithm is executed and find new location of the target when the target gets out of tracking range due to occlusion of whole part of a target or fast movement speed of a target. A variety of experiments with various image data sets are conducted. The algorithm proposed in this paper showed better performance than other conventional algorithms when fast movement and occlusion of a target occur.

Characterization and RT-PCR Detection of Turnip Mosaic Virus Isolated from Chinese Cabbage in Korea (배추에서 분리한 순무 모자이크 바이러스의 특성 및 역전사 중합효소 연쇄반응법(RT-PCR)을 이용한 검정)

  • 박원목;최설란;김수중;최승국;류기현
    • Korean Journal Plant Pathology
    • /
    • v.14 no.3
    • /
    • pp.223-228
    • /
    • 1998
  • Turnip mosaic virus)TuMV-Ca) was isolated from a Chinese cabbage showing severe mosaic and black necrotic spots symptoms in Korea. The virus was identified as a strain of TuMV by its host range test, particle morphology, serology, double stranded RNA analysis. For detection of the virus, reverse transcription and polymerase chain reaction(RT-PCR) was performed with a set of 18-mer TuMV-specific primers to amplify a 876 bp DNA fragment The virus was rapidly detected from total nucleic acids of virus infected tissues as well as native viral RNA of purified virion particles by RT-PCR. Detection limit of the viral RNA by RT-PCR was 10 fg.

  • PDF

Development of a Zero Velocity Detectable Sensor Algorithm with Dual Incremental Encoders (정지 속도 검출 가능한 이중 증분 엔코더 센서 알고리즘 개발)

  • Lee, Se-Han;Kim, Byoung-Chang
    • Journal of Institute of Control, Robotics and Systems
    • /
    • v.15 no.1
    • /
    • pp.82-88
    • /
    • 2009
  • The output of the encoder is a digital pulse, which is also easy to be connected to a digital controller. There are various angular velocity detecting methods of M, T, and M/T. Each of them has its own properties. There is a common limitation that the angular velocity detection period is strongly dependent on the destination velocity magnitude in case of ultimate low range. They have ultimately long detection period or cannot even detect angular velocity at near zero velocity. This paper proposes a zero velocity detectable sensor algorithm with the dual encoder system. The sensor algorithm is able to keep detection period moderately at near zero velocity and even detect zero velocity within nominal period. It is useful for detecting velocity in case of changing rotational direction at which there occurs zero velocity. In this paper, various experimental results are shown for the algorithm validity.

3D Convolutional Neural Networks based Fall Detection with Thermal Camera (열화상 카메라를 이용한 3D 컨볼루션 신경망 기반 낙상 인식)

  • Kim, Dae-Eon;Jeon, BongKyu;Kwon, Dong-Soo
    • The Journal of Korea Robotics Society
    • /
    • v.13 no.1
    • /
    • pp.45-54
    • /
    • 2018
  • This paper presents a vision-based fall detection system to automatically monitor and detect people's fall accidents, particularly those of elderly people or patients. For video analysis, the system should be able to extract both spatial and temporal features so that the model captures appearance and motion information simultaneously. Our approach is based on 3-dimensional convolutional neural networks, which can learn spatiotemporal features. In addition, we adopts a thermal camera in order to handle several issues regarding usability, day and night surveillance and privacy concerns. We design a pan-tilt camera with two actuators to extend the range of view. Performance is evaluated on our thermal dataset: TCL Fall Detection Dataset. The proposed model achieves 90.2% average clip accuracy which is better than other approaches.

Signal Detection and Control of Hemispherical Resonator Gyroscopes (반구형 공진 자이로스코프의 신호 검출 및 제어)

  • Hyun, Chul;Kang, Tae-Sam
    • Journal of Sensor Science and Technology
    • /
    • v.21 no.3
    • /
    • pp.204-210
    • /
    • 2012
  • In this paper, signal detection and control circuits for hemispherical resonator gyroscope(HRG) are designed, simulated and tested. HRG is one of the coriolis vibratory gyroscope(CVG) which has very stable quartz hemispherical resonator and shows very precise performance. HRG signals are usually modulated at the several kHz of resonant frequency. So the general control scheme cannot be applied directly because general control schemes mainly focused at low frequency range. Using demodulated and modulated PI control scheme with the signal detection which is presented in this paper, performance of manufactured HRG has tested.

Impulse Noise Detection Using Self-Organizing Neural Network and Its Application to Selective Median Filtering (Self-Organizing Neural Network를 이용한 임펄스 노이즈 검출과 선택적 미디언 필터 적용)

  • Lee Chong Ho;Dong Sung Soo;Wee Jae Woo;Song Seung Min
    • The Transactions of the Korean Institute of Electrical Engineers D
    • /
    • v.54 no.3
    • /
    • pp.166-173
    • /
    • 2005
  • Preserving image features, edges and details in the process of impulsive noise filtering is an important problem. To avoid image blurring, only corrupted pixels must be filtered. In this paper, we propose an effective impulse noise detection method using Self-Organizing Neural Network(SONN) which applies median filter selectively for removing random-valued impulse noises while preserving image features, edges and details. Using a $3\times3$ window, we obtain useful local features with which impulse noise patterns are classified. SONN is trained with sample image patterns and each pixel pattern is classified by its local information in the image. The results of the experiments with various images which are the noise range of $5-15\%$ show that our method performs better than other methods which use multiple threshold values for impulse noise detection.

Determination of Glyphosate in Whole Blood by HPLC-fluorescence Detection (HPLC 형광검출법에 의한 Glyphosate의 혈중농도 측정)

  • 이상기;김기욱;양자열;인상환;이수연
    • YAKHAK HOEJI
    • /
    • v.45 no.4
    • /
    • pp.347-351
    • /
    • 2001
  • A rapid and sensitive method for the determination of glyphosate, a phosphated amino acid herbicide, in whole blood is presented. After removal of protein, the whale blood was purified by using the anion exchange resin (Dowex 1), and derivatized with 9-fluorenylmethyl chloroformate (FMCL). Derivatized glyphosate from blood sample was injected onto a Whatman partisil 10SAX column and separated with 0.1M phosphate buffer (pH 2.5) and acetonitrile (ratio=3:1). The high performance liquid chromatography-fluorescence detection gave the detection limit of 86pg and linearity of 0.9999 in the range of 0.25 $\mu$g/ml and 25 $\mu$g/ml. The recoveries of glyphosate added to the blood samples were ranged from 75.3% to 100.4% compared to the samples prepared in water. The derivatized glyphosate was stable at various acidity and temperature. This method has been successfully applied to the blood samples of lethal intoxication with the herbicide glyphosate.

  • PDF

Face Detection Based On Multi-Scale Retinex (멀티 스케일 레티넥스 기반의 얼굴 인식)

  • Park, Sung-Hyun;Lee, June-Hwan;Rhee, Sang-Burm
    • Proceedings of the IEEK Conference
    • /
    • 2006.06a
    • /
    • pp.733-734
    • /
    • 2006
  • The Face Area Detection has an extensive error range of abstraction probabilities by image illuminations and background conditions. In this paper, to reduce error ranges of abstraction probabilities by factors such as illuminations and backgrounds, we made use of Retinex and the Face Area Detection algorithm together. In comparison with other previous methods[4], our proposed algorithm showed stabler and elevated detection rate.

  • PDF

On the use of numerical models for validation of high frequency based damage detection methodologies

  • Aguirre, Diego A.;Montejo, Luis A.
    • Structural Monitoring and Maintenance
    • /
    • v.2 no.4
    • /
    • pp.383-397
    • /
    • 2015
  • This article identifies and addresses current limitations on the use of numerical models for validation and/or calibration of damage detection methodologies that are based on the analysis of the high frequency response of the structure to identify the occurrence of abrupt anomalies. Distributed-plasticity non-linear fiber-based models in combination with experimental data from a full-scale reinforced concrete column test are used to point out current modeling techniques limitations. It was found that the numerical model was capable of reproducing the global and local response of the structure at a wide range of inelastic demands, including the occurrences of rebar ruptures. However, when abrupt sudden damage occurs, like rebar fracture, a high frequency pulse is detected in the accelerations recorded in the structure that the numerical model is incapable of reproducing. Since the occurrence of such pulse is fundamental on the detection of damage, it is proposed to add this effect to the simulated response before it is used for validation purposes.

Space-based Ocean Surveillance and Support Capability: with a Focus on Marine Safety and Security (영해관리를 위한 인공위성 원격탐사기술)

  • Yang, Chan-Su
    • Proceedings of KOSOMES biannual meeting
    • /
    • 2007.05a
    • /
    • pp.127-132
    • /
    • 2007
  • From the 1978 Seasat synthetic aperture radar(SAR) to present systems, spaceborne SAR has demonstrated the capability to image the Earth's ocean and land features over broad areas, day and night, and under most weather conditions. The application of SAR for surveillance of commercial fishing grounds can aid in the detection of illegal fishing activities and provides more efficient use of limited aircraft or patrol craft resources. In the area of vessel traffic monitoring for commercial vessels, Vessel Traffic Service (VTS) which uses the ground-based radar system has some difficulties in detecting moving ships due to the limited detection range of about 10 miles. This paper introduces the field testing results of ship detection by RADARSAT SAR imagery, and proposes a new approach for a Vessel Monitoring System(VMS), including VTS, and SAR combination service.

  • PDF