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

共 688 条记录，以下是91-100 订阅

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Training industrial robots with gesture recognition techniques

Training industrial robots with gesture recognition techniqu...

引用

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

作者： Piane, Jennifer Raicu, Daniela Furst, Jacob Yaskawa Amer Inc Waukegan IL 60085 USA Depaul Univ Chicago IL 60604 USA

ISBN: (纸本)9780819494351

In this paper we propose to use gesture recognition approaches to track a human hand in 3D space and, without the use of special clothing or markers, be able to accurately generate code for training an industrial robot to perform the same motion. The proposed hand tracking component includes three methods: a color-thresholding model, naive Bayes analysis and Support Vector Machine (SVM) to detect the human hand. Next, it performs stereo matching on the region where the hand was detected to find relative 3D coordinates. The list of coordinates returned is expectedly noisy due to the way the human hand can alter its apparent shape while moving, the inconsistencies in human motion and detection failures in the cluttered environment. Therefore, the system analyzes the list of coordinates to determine a path for the robot to move, by smoothing the data to reduce noise and looking for significant points used to determine the path the robot will ultimately take. The proposed system was applied to pairs of videos recording the motion of a human hand in a, real. environment to move the end-affector of a SCARA robot along the same path as the hand of the person in the video. The correctness of the robot motion was determined by observers indicating that motion of the robot appeared to match the motion of the video.

关键词： Naive Bayes Support Vector Machine Stereo matching Gesture recognition Industrial Robot

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Optimizing feature selection strategy for adaptive object identification in a noisy environment

Optimizing feature selection strategy for adaptive object id...

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

作者： Pandya, Sagar Lu, Thomas Chao, Tien-Hsin Univ Southern Calif Los Angeles CA 90089 USA CALTECH Jet Prop Lab Pasadena CA 91125 USA

ISBN: (纸本)9780819494351

We present the development of a multi-stage automatic target recognition (MS-ATR) system for computer vision in robotics. This paper discusses our work in optimizing the feature selection strategies of the MS-ATR system. Past implementations have utilized Optimum Trade-off Maximum Average Correlation Height (OT-MACH) filtering as an initial feature selection method, and principal component analysis (PCA) as a feature extraction strategy before the classification stage. Recent work has been done in the implementation of a modified saliency algorithm as a feature selection method. Saliency is typically implemented as a "bottom-up" search process using visual sensory information such as color, intensity, and orientation to detect salient points in the imagery. It is a general saliency mapping algorithm that receives no input from the user on what is considered salient. We discuss here a modified saliency algorithm that accepts the guidance of target features in locating regions of interest (ROI). By introducing target related input parameters, saliency becomes more focused and task oriented. It is used as an initial stage for the fast ROI detection method. The ROIs are passed to the later stages for feature extraction and target identification process.

关键词： optimization target detection saliency vision

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GPU based real-time trinocular stereovision

GPU based real-time trinocular stereovision

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intelligent robots and computer vision XXX: algorithms and techniques

作者： Yao, Yuanbin Linton, R.J. Padir, Taskin Robotics Engineering Program Electrical and Computer Engineering Department Worcester Polytechnic Institute 100 Institute Road Worcester MA 01609 United States

ISBN: (纸本)9780819494351

Most stereovision applications are binocular which uses information from a 2-camera array to perform stereo matching and compute the depth image. Trinocular stereovision with a 3-camera array has been proved to provide higher accuracy in stereo matching which could benefit applications like distance finding, object recognition, and detection. This paper presents a real-time stereovision algorithm implemented on a GPGPU (General-purpose graphics processing unit) using a trinocular stereovision camera array. Algorithm employs a winner-take-all method applied to perform fusion of disparities in different directions following various image processing techniques to obtain the depth information. The goal of the algorithm is to achieve real-time processing speed with the help of a GPGPU involving the use of Open Source computer vision Library (OpenCV) in C++ and NVidia CUDA GPGPU Solution. The results are compared in accuracy and speed to verify the improvement. © 2013 SPIE-IS&T.

关键词： Graphics processing unit

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Relating Vanishing Points to Catadioptric Camera Calibration

Relating Vanishing Points to Catadioptric Camera Calibration

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

作者： Duan, Wenting Zhang, Hui Allinson, Nigel M. Lincoln Univ Lab Vis Engn Brayford Pool LN6 7TS Lincoln England United Int Coll Dept Comp Sci Zhuhai Guangdong Peoples R China PKU HKUST Shenzhen Hong Kong Institut Shenzhen Key Lab Intelligent Media & Speech Shenzhen Peoples R China

ISBN: (纸本)9780819494351

This paper presents the analysis and derivation of the geometric relation between vanishing points and camera parameters of central catadioptric camera systems. These vanishing points correspond to the three mutually orthogonal directions of 3D real world coordinate system (i.e. X, Y and Z axes). Compared to vanishing points (VPs) in the perspective projection, the advantages of VPs under central catadioptric projection are that there are normally two vanishing points for each set of parallel lines, since lines are projected to conics in the catadioptric image plane. Also, their vanishing points are usually located inside the image frame. We show that knowledge of the VPs corresponding to XYZ axes from a single image can lead to simple derivation of both intrinsic and extrinsic parameters of the central catadioptric system. This derived novel theory is demonstrated and tested on both synthetic and real data with respect to noise sensitivity.

关键词： Vanishing points catadioptric camera calibration projection geometry

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Finger Tracking for Hand-held Device Interface Using Profile-matching Stereo vision

Finger Tracking for Hand-held Device Interface Using Profile...

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

作者： Chang, Yung-Ping Lee, Dah-Jye Moore, Jason Desai, Alok Tippetts, Beau Brigham Young Univ Dept Elect & Comp Engn Provo UT 84602 USA

ISBN: (纸本)9780819494351

Hundreds of millions of people use hand-held devices frequently and control them by touching the screen with their fingers. If this method of operation is being used by people who are driving, the probability of deaths and accidents occurring substantially increases. With a non-contact control interface, people do not need to touch the screen. As a result, people will not need to pay as much attention to their phones and thus drive more safely than they would otherwise. This interface can be achieved with real-time stereovision. A novel Intensity Profile Shape-Matching Algorithm is able to obtain 3-D information from a pair of stereo images in real time. While this algorithm does have a trade-off between accuracy and processing speed, the result of this algorithm proves the accuracy is sufficient for the practical use of recognizing human poses and finger movement tracking. By choosing an interval of disparity, an object at a certain distance range can be segmented. In other words, we detect the object by its distance to the cameras. The advantage of this profile shape-matching algorithm is that detection of correspondences relies on the shape of profile and not on intensity values, which are subjected to lighting variations. Based on the resulting 3-D information, the movement of fingers in space from a specific distance can be determined. Finger location and movement can then be analyzed for non-contact control of hand-held devices.

关键词： stereo vision hand-held device interface non-contact control finger tracking

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Visual homing with a pan-tilt based stereo camera

Visual homing with a pan-tilt based stereo camera

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

作者： Nirmal, Paramesh Lyons, Damian M. Fordham Univ Dept Comp Sci Bronx NY 10458 USA

ISBN: (纸本)9780819494351

Visual homing is a navigation method based on comparing a stored image of the goal location and the current image (current view) to determine how to navigate to the goal location. It is theorized that insects, such as ants and bees, employ visual homing methods to return to their nest [1]. Visual homing has been applied to autonomous robot platforms using two main approaches: holistic and feature-based. Both methods aim at determining distance and direction to the goal location. Navigational algorithms using Scale Invariant Feature Transforms (SIFT) have gained great popularity in the recent years due to the robustness of the feature operator. Churchill and Vardy [2] have developed a visual homing method using scale change information (Homing in Scale Space, HiSS) from SIFT. HiSS uses SIFT feature scale change information to determine distance between the robot and the goal location. Since the scale component is discrete with a small range of values [3], the result is a rough measurement with limited accuracy. We have developed a method that uses stereo data, resulting in better homing performance. Our approach utilizes a pan-tilt based stereo camera, which is used to build composite wide-field images. We use the wide-field images combined with stereo-data obtained from the stereo camera to extend the keypoint vector described in [3] to include a new parameter, depth (z). Using this info, our algorithm determines the distance and orientation from the robot to the goal location. We compare our method with HiSS in a set of indoor trials using a Pioneer 3-AT robot equipped with a BumbleBee2 stereo camera. We evaluate the performance of both methods using a set of performance measures described in this paper.

关键词： visual homing visual navigation stereovision mobile robots

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Designing and Making the Intelligence Assistant Robot and controlling it by the fuzzy procedure

Designing and Making the Intelligence Assistant Robot and co...

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10th International Conference on Electronics, computer and Computation (ICECCO)

作者： Zabbah, Iman Foolad, Shima Chaharaqran, Bahram Mazlooman, Reza Islamic Azad Univ Torbat E Heydarieh Branch Dept Comp Tehran Iran Semnan Univ Dept Comp Semnan Iran Maraghen Sanati Univ Dept Comp Maragheh Iran Natl Iranian Oil Prod Distribut Co Torbat Heydarieh Branch Torbat Heydarieh Iran

ISBN: (纸本)9781479933433

Mobile robots are those with the capability of moving in an environment. The controller of these robots needs to have the ability to do intelligent behaviours in an uncertain environment. Today fuzzy control of mobile robots in non-structured environments is increasing. Many represented algorithms for mobile robot navigation don't manifest appropriate performance in dynamic environments. This article aims at designing and making an intelligence robot. This robot is able to detect a specified target and track it. Velocity and steering of this robot is controlled by the fuzzy logic. Robot velocity is adjusted according to its distance from the target. This article is expressed the features of this mobile robot including different mechanical and electronic infrastructures, fuzzy navigation and vision controller. Navigation system of this robot makes its fuzzy decisions only based on the machine vision techniques and unlike many robots, it doesn't depend on sensor. It is concluded that robot with fuzzy navigation have 60% time saving than the non-fuzzy. The results obtained indicate its appropriate performance in order to navigate a target-oriented mobile robot in an undetermined and dynamic environment.

关键词： Mobile robot navigation Machine vision Robot fuzzy control Target tracking Intelligence robot

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Proceedings of SPIE-IS and T Electronic Imaging - intelligent robots and computer vision XXVIII: algorithms and techniques

Proceedings of SPIE-IS and T Electronic Imaging - Intelligen...

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intelligent robots and computer vision XXVIII: algorithms and techniques

ISBN: (纸本)9780819484154

The proceedings contain 32 papers. The topics discussed include: software framework for nano- and microscale measurement applications;a traffic situation analysis system;stereo matching based on two cameras and one 3D image sensor;linear stereo vision based objects detection and tracking using spectral clustering;real-time car detection system;real-time people and vehicle detection from UAV imagery;real-time pose invariant logo and pattern detection;study of temporal modified-RANSAC based method for the extraction and 3D shape reconstruction of moving objects from dynamic stereo images and for estimating the camera pose;a multiple feature based particle filter using mutual information maximization;high precision object segmentation and tracking for use in super resolution video reconstruction;robust pedestrian detection and tracking from a moving vehicle;and a target detection method in multimodal images with complex backgrounds and different views.

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Design and Realization of an intelligent Ground Vehicle with Modular Payloads

Design and Realization of an Intelligent Ground Vehicle with...

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Conference on intelligent robots and computer vision xxix - algorithms and techniques

作者： Akmanalp, Mehmet A. Doherty, Ryan M. Gorges, Jeffrey Kalauskas, Peter Peterson, Ellen Polido, Felipe Nestinger, Stephen S. Padir, Taskin Worcester Polytech Inst Robot Engn Program Worcester MA 01609 USA

ISBN: (纸本)9780819489487

In June 2011, Worcester Polytechnic Institute's (WPI) unmanned ground vehicle Prometheus participated in the 8th Annual Robotic Lawnmower and 19th Annual intelligent Ground Vehicle Competitions back-to-back. This paper details the two-year design and development cycle for WPI's intelligent ground vehicle, Prometheus. The on-board intelligence algorithms include lane detection, obstacle avoidance, path planning, world representation and waypoint navigation. The authors present experimental results and discuss practical implementations of the intelligence algorithms used on the robot.

关键词： Autonomous ground vehicle modular payloads path planning

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Hierarchical Loop Detection for Mobile Outdoor robots

Hierarchical Loop Detection for Mobile Outdoor Robots

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Conference on intelligent robots and computer vision xxix - algorithms and techniques

作者： Lang, Dagmar Winkens, Christian Haeselich, Marcel Paulus, Dietrich Univ Koblenz Landau AGAS Robot Act Vis Grp D-56070 Koblenz Germany

ISBN: (纸本)9780819489487

Loop closing is a fundamental part of 3D simultaneous localization and mapping (SLAM) that can greatly enhance the quality of long-term mapping. It is essential for the creation of globally consistent maps. Conceptually, loop closing is divided into detection and optimization. Recent approaches depend on a single sensor to recognize previously visited places in the loop detection stage. In this study, we combine data of multiple sensors such as GPS, vision, and laser range data to enhance detection results in repetitively changing environments that are not sufficiently explained by a single sensor. We present a fast and robust hierarchical loop detection algorithm for outdoor robots to achieve a reliable environment representation even if one or more sensors fail.

关键词： ring closing Detection algorithms Loops Robot Sensors Outdoors simultaneous localization and mapping Hierarchical Range of a function

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