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

共 372 条记录，以下是101-110 订阅

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Loop Closure Detection Using Local Zernike Moment Patterns

Loop Closure Detection Using Local Zernike Moment Patterns

引用

conference on intelligent robots and computer vision XXX - algorithms and techniques

作者： Sariyanidi, Evangelos Sencan, Onur Temeltas, Hakan Istanbul Tech Univ Control & Automat Engn Dept TR-34469 Istanbul Turkey

ISBN: (纸本)9780819494351

This paper introduces a novel image description technique that aims at appearance based loop closure detection for mobile robotics applications. This technique relies on the local evaluation of the Zernike Moments. Binary patterns, which are referred to as Local Zernike Moment (LZM) patterns, are extracted from images, and these binary patterns are coded using histograms. Each image is represented with a set of histograms, and loop closure is achieved by simply comparing the most recent image with the images in the past trajectory. The technique has been tested on the New College dataset, and as far as we know, it outperforms the other methods in terms of computation efficiency and loop closure precision.

关键词： Loop closure mobile robotics image processing SLAM computer vision

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Predictive vision from stereo video: Robust object detection for autonomous navigation using the Unscented Kalman Filter on streaming stereo images

Predictive vision from stereo video: Robust object detection...

引用

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

作者： Rosselot, Donald Aull, Mark Hall, Ernest L. Univ Cincinnati Sch Dynam Syst Ctr Robot Res Cincinnati OH 45221 USA

ISBN: (纸本)9780819479327

A predictive object detection algorithm was developed to investigate the practicality of using advanced filtering on stereo vision object detection algorithms such as the X-H Map. Obstacle detection with stereo vision is inherently noisy and non linear. This paper describes the X-H Map algorithm and details a method of improving the accuracy with the Unscented Kalman Filter (UKF). The significance of this work is that it details a method of stereo vision object detection and concludes that the UKF is a relevant method of filtering that improves the robustness of obstacle detection given noisy inputs. This method of integrating the UKF for use in stereo vision is suitable for any standard stereo vision algorithm that is based on pixel matching (stereo correspondence) from disparity maps.

关键词： Autonomous navigation Unscented Kalman Filter stereo vision XH-map algorithm Disparity Map

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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...

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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

引用

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...

引用

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...

引用

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

引用

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

引用

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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