• Title/Summary/Keyword: Visual navigation

Search Result 280, Processing Time 0.025 seconds

A Survey of Research on Human-Vehicle Interaction in Defense Area (국방 분야의 인간-차량 인터랙션 연구)

  • Yang, Ji Hyun;Lee, Sang Hun
    • Korean Journal of Computational Design and Engineering
    • /
    • v.18 no.3
    • /
    • pp.155-166
    • /
    • 2013
  • We present recent human-vehicle interaction (HVI) research conducted in the area of defense and military application. Research topics discussed in this paper include: training simulation for overland navigation tasks; expertise effects in overland navigation performance and scan patterns; pilot's perception and confidence on an overland navigation task; effects of UAV (Unmanned Aerial Vehicle) supervisory control on F-18 formation flight performance in a simulator environment; autonomy balancing in a manned-unmanned teaming (MUT) swarm attack, enabling visual detection of IED (Improvised Explosive Device) indicators through Perceptual Learning Assessment and Training; usability test on DaViTo (Data Visualization Tool); and modeling peripheral vision for moving target search and detection. Diverse and leading HVI study in the defense domain suggests future research direction in other HVI emerging areas such as automotive industry and aviation domain.

Development of GPS Simulation Tool Kit for Personal Computer (PC를 이용한 GPS Simulation System 개발)

  • 양원재;전승환;박계각
    • Journal of the Korean Institute of Navigation
    • /
    • v.24 no.4
    • /
    • pp.219-226
    • /
    • 2000
  • Ship's position data obtaining method is one of the very important factor in navigation. Nowadays, GPS(Global Positioning System) using the earth orbiting satellites are equipped and operated for the position finding. Because it provides more precise position information than other equipments and is very convenient for navigator. In this study, it is designed to develop the GPS simulator for everybody being able to practise the GPS operating skill like as navigation planning, navigation calculating etc. And also, it can be operated with personal computer without real GPS receiver. This simulation system is based on the real GPS receiver and built by the visual basic 5.0 program. And it displays the ship's position and navigating information and plots the ship's moving track on the screen in real time according as initial setup data-main engine's rpm, rudder angle, departure position and waypoint.

  • PDF

Onboard dynamic RGB-D simultaneous localization and mapping for mobile robot navigation

  • Canovas, Bruce;Negre, Amaury;Rombaut, Michele
    • ETRI Journal
    • /
    • v.43 no.4
    • /
    • pp.617-629
    • /
    • 2021
  • Although the actual visual simultaneous localization and mapping (SLAM) algorithms provide highly accurate tracking and mapping, most algorithms are too heavy to run live on embedded devices. In addition, the maps they produce are often unsuitable for path planning. To mitigate these issues, we propose a completely closed-loop online dense RGB-D SLAM algorithm targeting autonomous indoor mobile robot navigation tasks. The proposed algorithm runs live on an NVIDIA Jetson board embedded on a two-wheel differential-drive robot. It exhibits lightweight three-dimensional mapping, room-scale consistency, accurate pose tracking, and robustness to moving objects. Further, we introduce a navigation strategy based on the proposed algorithm. Experimental results demonstrate the robustness of the proposed SLAM algorithm, its computational efficiency, and its benefits for on-the-fly navigation while mapping.

Simultaneous Localization and Mobile Robot Navigation using a Sensor Network

  • Jin Tae-Seok;Bashimoto Hideki
    • International Journal of Fuzzy Logic and Intelligent Systems
    • /
    • v.6 no.2
    • /
    • pp.161-166
    • /
    • 2006
  • Localization of mobile agent within a sensing network is a fundamental requirement for many applications, using networked navigating systems such as the sonar-sensing system or the visual-sensing system. To fully utilize the strengths of both the sonar and visual sensing systems, This paper describes a networked sensor-based navigation method in an indoor environment for an autonomous mobile robot which can navigate and avoid obstacle. In this method, the self-localization of the robot is done with a model-based vision system using networked sensors, and nonstop navigation is realized by a Kalman filter-based STSF(Space and Time Sensor Fusion) method. Stationary obstacles and moving obstacles are avoided with networked sensor data such as CCD camera and sonar ring. We will report on experiments in a hallway using the Pioneer-DX robot. In addition to that, the localization has inevitable uncertainties in the features and in the robot position estimation. Kalman filter scheme is used for the estimation of the mobile robot localization. And Extensive experiments with a robot and a sensor network confirm the validity of the approach.

3D Stereoscopic Navigation of Buildings Considering Visual Perception (시각적 인지를 고려한 건축물의 3D 스테레오 내비게이션)

  • Shin, Il-Kyu;Yoon, Yeo-Jin;Choi, Jin-Won;Choi, Soo-Mi
    • Journal of the Korea Computer Graphics Society
    • /
    • v.18 no.2
    • /
    • pp.63-72
    • /
    • 2012
  • As BIM(Building Information Modeling) is widely used in the construction process the need for exploring building models realistically is also growing. In this paper, we present a 3D stereoscopic navigation method for virtual buildings considering virtual perception. We first find out factors that may cause virtual discomfort while navigating stereoscopic building models, and then develop a method for automatically adjusting the range of virtual camera separation. In addition, we measure each user's JND(Just Noticeable Difference) in depth to adjust virtual camera separation and movement. The presented method can be used for various architectural applications by creating user-customized 3D stereoscopic contents.

Image Analysis using Transform domain-based Human Visual Parameter (변환영역 기반의 시각특성 파라미터를 이용한 영상 분석)

  • Kim, Yoon-Ho
    • Journal of Advanced Navigation Technology
    • /
    • v.12 no.4
    • /
    • pp.378-383
    • /
    • 2008
  • This paper presents a method of image analysis based on discrete cosine transform (DCT) and fuzzy inference(Fl). It concentrated not only on the design of fuzzy inference algorithm but also on incorporating human visual parameter(HVP) into transform coefficients. In the first, HVP such as entropy, texture degree are calculated from the coefficients matrix of DCT. Secondly, using these parameters, fuzzy input variables are generated. Mamdani's operator as well as ${\alpha}$-cut function are involved to simulate the proposed approach, and consequently, experimental results are presented to testify the performance and applicability of the proposed scheme.

  • PDF

Image Contour Extraction Method base on Gestalt Theory (형태 이론에 기반한 이미지 윤곽선 추출 방법)

  • Ha, Chu-Ja;Kim, Cheol-Won
    • Journal of Advanced Navigation Technology
    • /
    • v.13 no.2
    • /
    • pp.257-261
    • /
    • 2009
  • This paper propose a new method using Gestalt theory to extract image contour. The proposed method use Gestalt theory based on proximity, similarity and continuation for grouping objects from image segmentation. It use downward feedback and perception to materialize one visual level in image from heterogeneity visual levels in image. The experimental result show that the proposed method achieves better performance than other methods.

  • PDF

Robust Control of Robot Manipulators using Vision Systems

  • Lee, Young-Chan;Jie, Min-Seok;Lee, Kang-Woong
    • Journal of Advanced Navigation Technology
    • /
    • v.7 no.2
    • /
    • pp.162-170
    • /
    • 2003
  • In this paper, we propose a robust controller for trajectory control of n-link robot manipulators using feature based on visual feedback. In order to reduce tracking error of the robot manipulator due to parametric uncertainties, integral action is included in the dynamic control part of the inner control loop. The desired trajectory for tracking is generated from feature extraction by the camera mounted on the end effector. The stability of the robust state feedback control system is shown by the Lyapunov method. Simulation and experimental results on a 5-link robot manipulator with two degree of freedom show that the proposed method has good tracking performance.

  • PDF

Human Sensibility Ergonomics Evaluation of the Car Navigation System Digital Map (자동차 항법장치 도로지도의 감성공학적 평가에 관한 연구)

  • Cha, Doo-Won;Paek, Seung-Reu;Park, Peom
    • Journal of Korean Society of Industrial and Systems Engineering
    • /
    • v.21 no.48
    • /
    • pp.101-111
    • /
    • 1998
  • CNS (Car Navigation System) is the most compatible candidate among various in-vehicle information systems as a provider of ITS (Intelligence Transport Systems) information. It generally consists of remote controller, display, CD-changer, GPS receiver and so on. Among them, display is the most important and critical element of the HMI (Human-Machine Interface) suggesting the digital map to the driver. Therefore, it is certain that the display gives cognitive, physical, mental and visual workloads to the driver which are directly related with the driver's and road safety with the success of ITS. Until now, various human factors techniques have been developed and applied to estimate the driver's workload and to collect the driver's requirements of the CNS digital map, for example, mental workload assessment, visual activity analysis, cognitive analysis and so on. In addition to these kinds of techniques, this research performed the human sensibility ergonomics approach to directly investigate and evaluate the driver's requirements and sensibilities of the real products.

  • PDF

Human Visual System Based Adaptive Watermarking in Frequency Domain (HVS 기반 주파수 공간에서의 적응적인 워터마킹)

  • Park, Ki-Hong;Yoon, Byung-Min;Kim, Yoon-Ho
    • Journal of Advanced Navigation Technology
    • /
    • v.9 no.2
    • /
    • pp.170-176
    • /
    • 2005
  • In this paper, we proposed watermarking algorithm based on wavelet transform. Discrete wavelet transform is involved to calculate additive energy strength. Considering imperceptibility, after computing contrast and texture sensitivity in gray-level image, we inserted watermark with variable weight due to the feature of coefficient block. Consequently, applying human visual system, the experimental results showed that the proposed algorithm satisfied the properties of robustness and imperceptibility that are the major conditions of watermarking.

  • PDF