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检索条件"任意字段=Conference on Intelligent Robots and Computer Vision XXIX - Algorithms and Techniques"

共 373 条记录，以下是101-110 订阅

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Video flow active control by means of adaptive shifted foveal geometries

Video flow active control by means of adaptive shifted fovea...

引用

conference on intelligent robots and computer vision XIX: algorithms, techniques, and Active vision

作者： Urdiales, C Rodríguez, JA Bandera, A Sandoval, F Univ Malaga ETSI Telecommun Dept Elect Technol E-29071 Malaga Spain

ISBN: (纸本)0819438626

This paper presents a control mechanism for video transmission that relies on transmitting non-uniform resolution images depending on the delay of the communication channel. These images are built in an active way to keep the areas of interest of the image at the highest resolution available. In order to shift the area of high resolution over the image and to achieve a data structure easy to process by using conventional algorithms, a shifted fovea multiresolution geometry of adaptive size is used. Besides, if delays are nevertheless too high, the different areas of resolution of the image can be transmitted at different rates. A functional system has been developed for corridor surveillance with static cameras. Tests with real video images have proven that the method allows an almost constant rate of images per second as long as the channel is not collapsed.

关键词： active vision foveal images control flow motion detection

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GROUNDING LANGUAGE IN PERCEPTION 12

GROUNDING LANGUAGE IN PERCEPTION

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12th conference on intelligent robots and computer vision: algorithms and techniques

作者： SISKIND, JM UNIV PENN INST RES COGNIT SCIPHILADELPHIAPA 19104

ISBN: (纸本)0819413208

We describe an implemented computer program that recognizes the occurrence of simple spatial motion events in simulated video input. The program receives an animated line-drawing as input and produces as output a semantic representation of the events occurring in that movie. We suggest that the notions of support, contact, and attachment are crucial to specifying many simple spatial motion event types and present a logical notation for describing classes of events that incorporates such notions as primitives. We then suggest that the truth values of such primitives can be recovered from perceptual input by a process of counterfactual simulation, predicting the effect of hypothetical changes to the world on the immediate future. Finally, we suggest that such counterfactual simulation is performed using knowledge of naive physical constraints such as substantiality, continuity, gravity, and ground plane. We describe the algorithms that incorporate these ideas in the program and illustrate the operation of the program on sample input.

关键词： Image segmentation computer simulations computer vision technology Machine vision Robot vision robots Logic Kinematics Numerical integration Software

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Towards vision-Based Impedance Control for the Contact Inspection of Unknown Generically-Shaped Surfaces with a Fully-Actuated UAV

Towards Vision-Based Impedance Control for the Contact Inspe...

引用

IEEE/RSJ International conference on intelligent robots and Systems (IROS)

作者： Rashad, Ramy Bicego, Davide Jiao, Ran Sanchez-Escalonilla, Santiago Stramigioli, Stefano Univ Twente Robot & Mechatron Grp Enschede Netherlands Beihang Univ Sch Mech Engn & Automat Beijing Peoples R China ITMO Univ St Petersburg Russia

ISBN: (纸本)9781728162126

The integration of computer vision techniques for the accomplishment of autonomous interaction tasks represents a challenging research direction in the context of aerial robotics. In this paper, we consider the problem of contact-based inspection of a textured target of unknown geometry and pose. Exploiting state of the art techniques in computer graphics, tuned and improved for the task at hand, we designed a framework for the projection of a desired trajectory for the robot end-effector on a generically-shaped surface to be inspected. Combining these results with previous work on energy-based interaction control, we are laying the basis of what we call vision-based impedance control paradigm. To demonstrate the feasibility and the effectiveness of our methodology, we present the results of both realistic ROS/Gazebo simulations and preliminary experiments with a fully-actuated hexarotor interacting with heterogeneous curved surfaces whose geometric description is not available a priori, provided that enough visual features on the target are naturally or artificially available to allow the integration of localization and mapping algorithms.

关键词： vision-Based Impedance Control Aerial Physical Interaction Contact-Based Inspection Aerial Robotics

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intelligent robots and computer vision XIV: algorithms, techniques, Active vision, and Materials Handling

Intelligent Robots and Computer Vision XIV: Algorithms, Tech...

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intelligent robots and computer vision XIV: algorithms, techniques, Active vision, and Materials Handling

ISBN: (纸本)0819419524

This conference proceedings contain 70 papers. Topics covered include:Pattern recognition in intelligent robotics;Active vision and control;Color image processing;Systems and applications;Robotic navigation, path planning, and use of motion and image sequences;3D modeling and data processing for robotics and machine vision;Three dimensional pattern recognition for intelligent robots;Neural nets for pattern recognition and machine vision;Feature extraction;and;Detection and segmentation in machine vision.

关键词： computer vision

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Micro-assembly cell with dual optical/computer vision control for electrostatic gripping of MEMS

Micro-assembly cell with dual optical/computer vision contro...

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conference on intelligent robots and computer vision XXI

作者： Enikov, ET Clark, S Minkov, L Univ Arizona Dept Aeronaut & Mech Engn Tucson AZ 85721 USA

ISBN: (纸本)081945155X

This paper describes the development of a miniature assembly cell for microsystems. The cell utilizes a transparent electrostatic gripper all-owing the use of computer vision for part alignment with respect to the gripper. Part to assembly alignment is achieved via optical triangulation using a fiber-coupled laser and a position sensitive detector (PSD). The system layout, principle of operation and design are described along with the visual and optical control algorithms and their implementation. Experimental measurements of the performance of the stage indicate normal and tangential gripping forces in the range of 0.03-2.5 mN and 1.-9. mN respectively. The visual search algorithm limits the feature tracking speed to 111ms /search. The alignment accuracy of the visual and optical proportional position feedback controls were determined to be +/-7 mum and +/-10 mum respectively.

关键词： electrostatic clamp visual servoing disparate sensing modalities optical feedback

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REAL-TIME MODEL-BASED vision FOR INDUSTRIAL DOMAINS 12

REAL-TIME MODEL-BASED VISION FOR INDUSTRIAL DOMAINS

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12th conference on intelligent robots and computer vision: algorithms and techniques

作者： SEIDA, S MAGEE, M SW RES INST DIV AUTOMAT & DATA SYST 05SAN ANTONIOTX 78228

ISBN: (纸本)0819413208

This paper describes a model based vision system that has been developed which is able to perform model based reasoning at real-time (or near real-time) rates and for which both the hardware and prototyping costs are low. The basic approach taken is to extract a set of useful features from observed models using a library of feature primitive operators. Scale and orientation invariant combinations of these features are used as indices into a hardware lookup table to establish initial correspondence between similar combinations that will be encountered when examining unknown objects. When performing initial recognition of an unknown object, evidence for an object in a particular spatial pose is accumulated, giving rise to an initial set of hypotheses. The strongest hypotheses are then refined by iteratively hypothesizing new (previously uninstantiated) model/object feature matches and computing a confidence measure associated with the current instantiation set. If confidence increases the newly hypothesized instantiation is retained, otherwise it is discarded.

关键词： Visual process modeling Feature extraction Systems modeling computer vision technology Machine vision Computing systems Image processing Robot vision robots 3D modeling

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Engineering Robust intelligent robots

Engineering Robust Intelligent Robots

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27th conference on intelligent robots and computer vision: algorithms and techniques

作者： Hall, E. L. Ali, S. M. Alhaj Ghaffari, M. Liao, X. Cao, M. Univ Cincinnati Ctr Robot Res Cincinnati OH 45221 USA Hashemite Univ Jordanstown North Ireland

ISBN: (纸本)9780819479327

The purpose of this paper is to discuss the challenge of engineering robust intelligent robots. Robust intelligent robots may be considered as ones that not only work in one environment but rather in all types of situations and conditions. Our past work has described sensors for intelligent robots that permit adaptation to changes in the environment. We have also described the combination of these sensors with a "creative controller" that permits adaptive critic, neural network learning, and a dynamic database that permits task selection and criteria adjustment. However, the emphasis of this paper is on engineering solutions which are designed for robust operations and worst case situations such as day night cameras or rain and snow solutions. This ideal model may be compared to various approaches that have been implemented on "production vehicles and equipment" using Ethernet, CAN Bus and JAUS architectures and to modern, embedded, mobile computing architectures. Many prototype intelligent robots have been developed and demonstrated in terms of scientific feasibility but few have reached the stage of a robust engineering solution. Continual innovation and improvement are still required. The significance of this comparison is that it provides some insights that may be useful in designing future robots for various manufacturing, medical, and defense applications where robust and reliable performance is essential.

关键词： intelligent robots robust engineering eclecticism creative control reinforcement learning adaptive critic

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Fast and efficient indexing approach for object recognition

Fast and efficient indexing approach for object recognition

引用

conference on intelligent robots and computer vision XVIII - algorithms, techniques, and Active vision

作者： Hefnawy, A Mashali, S Rashwan, M Fikri, M Elect Res Inst Cairo Egypt

ISBN: (纸本)0819434302

This paper introduces a fast and efficient indexing approach for both 2D & 3D model-based object recognition in the presence of rotation, translation, and scale Variations of objects. The indexing entries are computed after preprocessing the data by Haar wavelet decomposition. The scheme is based on a unified image feature detection approach based on Zernike moments. A set of low level features, e.g. high precision edges, gray level corners, are estimated by a set of orthogonal Zernike moments, calculated locally around every image point. A high dimensional, highly descriptive indexing entries are then calculated based on the correlation of these local features and employed for fast access to the model database to generate hypotheses. A Bst of the most candidate models is then presented by evaluating the hypotheses. Experimental results are included to demonstrate the effectiveness of the proposed indexing approach.

关键词： computer vision multidimensional indexing object recognition wavelet transform

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Fuzzy logic control for an automated guided vehicle

Fuzzy logic control for an automated guided vehicle

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conference on intelligent robots and computer vision XVII - algorithms, techniques, and Active vision

作者： Cao, M Hall, E Univ Cincinnati Ctr Robot Res Cincinnati OH 45221 USA

ISBN: (纸本)081942983X

This paper describes the use of fuzzy logic control for the high level control systems of a mobile robot. The advantages of the fuzzy logic system are that multiple types of input such as that from vision and sonar sensors as well as stored map information can be cased to guide the robot. Sensor fusion can be accomplished between real time sensed information and stored information in a manner similar to a human decision maker. vision guidance is accomplished with a CCD camera with a zoom lens. The data is collected through a commercial tracking device, communicating to the computer the X,Y coordinates of a lane marker. Testing of these systems yielded positive results by showing that at five miles per hour, the vehicle can follow a line and avoid obstacles. The obstacle detection uses information from Polaroid sonar detection system. The motor control system uses a programmable Galil motion control system. This design, in its modularity, creates a portable autonomous controller that could be used for any mobile vehicle with only minor adaptations.

关键词： fuzzy logic vision guidance mobile robots motion control

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Quality classification of wooden surfaces using Gabor filters and genetic feature optimization

Quality classification of wooden surfaces using Gabor filter...

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conference on intelligent robots and computer vision XVIII - algorithms, techniques, and Active vision

作者： Pölzleitner, W Schwingskakl, G Graz Tech Univ A-8010 Graz Austria

ISBN: (纸本)0819434302

We apply a model of texture segmentation using multiple spatially and spectrally localized filters, known as Gabor filters, to the analysis of texture and defect regions found on wooden boards. Specifically we present a method to find an optimal set of parameters for a given two-dimensional object detection method. The method uses banks of Gabor filters to limit the range of spatial frequencies, where mutually distinct textures differ significantly in their dominant characterizing frequencies. By encoding images into multiple narrow spatial frequency and orientation channels a local classification of texture regions can be achieved. Unlike other methods applying Gabor filters, we do not use a full Gabor transform, but use feature selection techniques to maximize discrimination. The selection method uses a genetic algorithm to optimize various parameters of the system including Gabor weights, and the parameters of morphological pre-processing. We demonstrate the applicability of the method to the task of classifying wooden textures, and report experimental results using the proposed method.

关键词： computer vision

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