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共 474 条记录，以下是361-370 订阅

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Stereo Analysis of Archaelogical Scenes Using Monogenic Signal Representation

Stereo Analysis of Archaelogical Scenes Using Monogenic Sign...

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4th International conference on computer Graphics theory and Applications

作者： Alifragis, Manthos Tzafestas, Costas S. Natl Tech Univ Athens Sch Elect & Comp Engn Div Signals Control & Robot GR-15773 Athens Greece

ISBN: (纸本)9783642118395

this paper presents the results of an experimental study regarding the application of recent stereo analysis theories in the frequency domain, particularly the phase congruency and monogenic filtering methods. the initial approach to the stereo matching problem employed feature based correlation methods. However, the requirement for more dense depth-map output led us to the development of disparity map estimation methods, minimizing a matching cost function between image regions or pixels. the cost function consists of a newly proposed similarity measure function, based on the geometrical properties of the monogenic signal. Our goal was to examine the performance of these methods in a stereo matching problem setting, on photos of complicated scenes. Two objects were used for this purpose: (i) a scene from an ancient Greek temple of Acropolis and (ii) the outside scene of the gate of an ancient theatre. Due to the complex structure of the photographed objects, classic techniques used for stereo matching give poor results. On the contrary, the three-dimensional models and disparity map of the scene computed when applying the proposed method, are much more detailed and consistent.

关键词： Monogenic signal Phase domain Phase congruency 3D reconstruction Disparity map Graph cuts

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Autonomous robot control with DSP and video camera using MATLAB State-Flow chart

Autonomous robot control with DSP and video camera using MAT...

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European DSP Education and Research conference (EDERC)

作者： Aviv Lichtigstein Roy Or-El Arie Nakhmani Control and Robotics Laboratory Department of Electrical Engineering Technion-Israel Institute of Technology Israel

this paper presents an embedded system for autonomous control of irobot Create that consists of real time target tracking and robot navigation. Tracking and navigation algorithms were implemented using the TI DM6437 EVM board. the robot's performance demonstrates that a visual tracking and navigation can be efficiently and robustly implemented, and TI DSP is suitable for running both algorithms simultaneously due to its low power consumption and high-speed performance. the proposed tools have a steep learning curve, and they can be used as a platform for the further development.

关键词： computer languages Tracking Navigation robot vision systems MATLAB Instruments

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Monocular-vision-based study on moving object detection and tracking

Monocular-vision-based study on moving object detection and ...

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International conference on New Trends in Information and Service Science, NISS

作者： Liu Dong Xi Lin College of Automatic Control Beijing Union University Beijing China Department of Computer Science and Technology Beijing University of Chemical and Technology Beijing China

ISBN: (纸本)9781424469826;9788988678183

In this paper, we present an approach for recognizing and tracking a moving color object which break into the robot's camera vision in the mobile robot. In order to obtain input feature for moving-object recognition, we perform image processing of the video sequence by background substraction method. Given the images of video sequence provided by a fixed camera on mobile robot, disparity images in different time are integrated into a tracking framework in order to find the HSV space based color features of the moving object. Based on the color object's moving and background substraction method, an color classifier based on the HS thresholds is trained to detect moving object. We show experimentally that the moving-object recognition performance can be improved significantly by using information about object's edge as an additional feature. through the recognition, we can find the center of the moving object and control the mobile robot's angle and rate to realize the vision-tracking of moving object. Our system aims at applications in the field of robot intelligence,where it is important to do run-on recognition in real-time, to allow for robot sel-learning and not to rely on appointed features.

关键词： Object detection Mobile robots robot vision systems Intelligent robots Cameras Video sequences Image recognition Image processing robot control Real time systems

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Research on Intelligent Glue-coating robot Based on Visual Servo

Research on Intelligent Glue-coating Robot Based on Visual S...

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2010 4th International conference on Intelligent Information Technology Application (IITA2010)

作者： Zhigang Yang,Yi An School of computer and Automation Engineering,Hebei Polytechnic University,Tangshan,Hebei,063009,China Yanbin Sun,Jingchun Zhang School of Information,Hebei Polytechnic University,Tangshan,Hebei,063009,China

At present,Glue-coating machines have some shortages,such as unintelligence,complexity of setting glue path for new *** this paper,real-time image capture was achieved by using digital camera technology and image processing *** captured image is converted into a character *** model is determined through comparing with the standard library and the *** image of workpiece was vectored through frame extracting and *** NC(Numerical Control) code generation technology,the NC code is automatically generated for sprinkler nozzle walking *** Appling visual servo and embedding the vision system into feedback loop of the robot,the system achieves high-precision robot *** extracting the glue line curve from image,thinning glue curve by morphological method,and extracting the frame information,the closure and quality of the glue curve can be *** of test show that the effect is satisfactory and the method is effective.

关键词： Visual Servo Glue-coating robot Glue Curve Quality Detecting DM642

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the Design of DSP-Based Corner Detection for Power Line Inspection robot

The Design of DSP-Based Corner Detection for Power Line Insp...

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4th International conference on computer Science and Education

作者： Zuo, Qi Guo, Zijian Sun, Dehui Xu, De North China Univ Technol Field Bus Tech & Automat Key Lab Beijing Peoples R China Chinese Acad Sci Inst Automat Lab Comp Syst Intelligence Sci Beijing Peoples R China

ISBN: (纸本)9781424435197

Aiming at the requirement of power line inspection robot, this paper develops and builds a vision system depending upon the TMS320DM642 as the core, which can realize the image collection and display, implement the image features extraction. through the extended UART interfaces, this system can communicate with the control unit of Power Line Inspection robot. Corner coordinates obtained from the algorithm of this system can be used for extraction and matching of the image feature points, motion estimation, three-dimensional reconstruction, etc. Compared to the traditional vision system based on image capturing cards and PC platforms, it has the advantages of small size, favourable real-time properties, low power consumption, etc. Experiment results indicate that the precision and speed of corner extraction are both better than those of the traditional PC platforms.

关键词： Corner defector harris algorithm DM642 power line inspection robot

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ATTENTION MODELS FOR VERGENCE MOVEMENTS BASED ON thE JAMF FRAMEWORK AND thE POPEYE robot

ATTENTION MODELS FOR VERGENCE MOVEMENTS BASED ON THE JAMF FR...

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4th International conference on computer vision theory and Applications

作者： Wilming, Niklas Wolfsteller, Felix Koenig, Peter Caseiro, Rui Xavier, Joao Araujo, Helder Univ Osnabruck Inst Cognit Sci Osnabruck Germany Univ Coimbra Inst Syst & Robot ISR Coimbra Portugal

ISBN: (纸本)9789898111692

In this work we describe a novel setup for implementation and development of stereo vision attention models in a realistic embodied setting. We introduce a stereo vision robot head, called POPEYE, that provides degrees of freedom comparable to a human head. We describe the geometry of the robot as well as the characteristics that make it a good candidate for studying models of visual attention. Attentional robot control is implemented with JAMF, a graphical modeling framework which allows to easily implement current state-of-the-art saliency models. We give a brief overview over JAMF and show implementations of four exemplary attention models that can control the robot head.

关键词： Stereo vision Visual attention Active vision

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A YARP-BASED ARCHITECTURAL FRAMEWORK FOR robotIC vision APPLICATIONS

A YARP-BASED ARCHITECTURAL FRAMEWORK FOR ROBOTIC VISION APPL...

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4th International conference on computer vision theory and Applications

作者： Stefansson, Stefan Freyr Jonsson, Bjorn Por thorisson, Kristinn R. Reykjavik Univ Database Lab Kringlan 1 IS-103 Reykjavik Iceland Reykjavik Univ Sch Comp Sci IS-103 Reykjavik Iceland Reykjavik Univ CADIA IS-103 Reykjavik Iceland

ISBN: (纸本)9789898111692

the complexity of advanced robot vision systems calls for an architectural framework with great flexibility with regards to sensory, hardware, processing, and communications requirements. We are currently developing a system that uses time-of-flight and a regular video stream for mobile robot vision applications. We present an architectural framework based on YARP, and evaluate its efficiency. Overall, we have found YARP to be easy to use, and our experiments show that the overhead is a reasonable tradeoff for the convenience.

关键词： YARP computer vision Architecture Performance evaluation

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Appearance-based and active 3D object recognition using vision

Appearance-based and active 3D object recognition using visi...

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4th International conference on computer vision theory and Applications, VISAPP 2009

作者： Trujillo-Romero, F. Devy, M. CNRS LAAS 7 avenue du Colonel Roche 31077 Toulouse France Université de Toulouse UPS INSA INPT ISAE LAAS Toulouse France

ISBN: (纸本)9789898111692

this paper concerns 3D object recognition from vision. In our robotics context an object must be recognized and localized in order to be grasped by a mobile robot equipped with a manipulator arm: several cameras are mounted on this robot, on a static mast or on the wrist of the arm. the use of such a robot for object recognition, makes possible active strategies for object recognition. this system must be able to place the sensor in different positions around the object in order to learn discriminant features on every object to be recognized in a first step, and then to recognize these objects before a grasping task. Our method exploits the Mutual Information to actively acquire visual data until the recognition, like it was proposed in works presented in (Denzler and Brown, 2000) and (Denzler et al., 2001): color histogram, shape context, shape signature, Harris or Sift points descriptors are learnt from different viewpoint around every object in order to make the system more robust and efficient.

关键词： Object recognition

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A Framework for Multi robot Guidance Control

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4th International conference on Industrial Application of Holonic and Multi-Agent Systems

作者： Keskin, Onur Uyar, Erol Dokuz Eylul Univ Mechatron Engn Dept TR-35100 Bornova Turkey

ISBN: (纸本)9783642036668

In this paper we present a framework for path planning and path finding for multiple mobile robots with global vision. Our framework model considers the agents' dynamic status and their environment with obstacles to perform given tasks. the global vision system provides feedback to main controller computer and mobile robots are directed towards to their tasks with avoiding obstacles and without any collision. Different kinds of scenario are prepared to simulate manipulating tasks and non-collision behavior with our framework. Experiment results with Lego Mindstorms NXT shows that our framework can be used where a multi robot system is needed with minimum resources.

关键词： multi-agent systems mobile robot global vision path finding

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A VIRTUAL REALITY SIMULATOR FOR ACTIVE STEREO vision SYSTEMS

A VIRTUAL REALITY SIMULATOR FOR ACTIVE STEREO VISION SYSTEMS

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4th International conference on computer vision theory and Applications

作者： Chessa, Manuela Solari, Fabio Sabatini, Silvio P. Univ Genoa Dept Biophys & Elect Engn I-16145 Genoa Italy

ISBN: (纸本)9789898111692

the virtual reality is a powerful tool to simulate the behavior of the physical systems. the visual system of a robot and its interplay with the 3D environment can be modeled and simulated through the geometrical relationships between the virtual stereo cameras and the virtual 3D world. the novelty of our approach is related to the use of the virtual reality as a tool to simulate the behavior of active vision systems. In the standard way, the virtual reality is used for the perceptual rendering of the visual information exploitable by a human user. In the proposed approach, a virtual world is rendered to simulate the actual projections on the cameras of a robotic system, thus the mechanisms of the active vision are quantitatively validated by using the available ground truth data.

关键词： Binocular vision Active fixation Virtual reality Ground truth data

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