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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131-140 订阅

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intelligent robots and computer vision IX: algorithms and techniques

Intelligent Robots and Computer Vision IX: Algorithms and Te...

引用

intelligent robots and computer vision IX: algorithms and techniques

This conference Proceedings contains 58 papers presented in 8 sessions dealing with: vision and robotics problems needing solutions;pattern recognition for computer vision;image processing;intelligent materials handling and vision;novel preprocessing algorithms and hardware;technology to support intelligent robots and automated systems;fuzzy logic in intelligent systems and computer vision;image segmentation techniques. The topics considered include the following, among others: learning procedure for the recognition of 3-D objects from 2-D images;flexible gray-level vision system based on multiple cell feature description and Hough transform;extraction of the foveal center and lesion boundary from fundus images;design and characterization of a space-variant CCD sensor;toward a general formula for analogical learning leading to more autonomous systems;image analysis using attributed fuzzy tournament matching algorithm;fuzzy logic for fault diagnosis;color segmentation using minimum description length (MDL) clustering;segmentation using range data and structured light;finding distinctive colored regions in images;multiresolution segmentation of forward-looking IP and SAR imagery using neural networks.

关键词： robots

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computer vision system for an autonomous mobile robot

Computer vision system for an autonomous mobile robot

引用

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

作者： Liao, XQ Cao, J Cao, M Samu, T Hall, E Univ Cincinnati Ctr Robot Res Cincinnati OH 45221 USA

ISBN: (纸本)0819438626

The purpose of this paper is to compare three methods for three-dimensional measurements of line position used for the vision guidance to navigate an autonomous mobile robot. A model is first developed to map three dimensional ground points into image points to be developed using homogeneous coordinates. Then using the ground plane constraint, the inverse transformation that maps image points into three dimensional ground points is determined. And then the system identification problem is solved using a calibration device. Calibration data is used to determine the model parameters by minimizing the mean square error between model and calibration points. A novel simplification is then presented which provides surprisingly accurate results. This method is called the magic matrix approach and uses only the calibration data. A more standard variation of this approach is also considered. The significance of this work is that it shows that three methods that are based on three-dimensional measurements may be used for mobile robot navigation and that a simple method can achieve accuracy to a fraction of an inch which is sufficient in some applications.

关键词： autonomous mobile robot calibration navigation magic matrix

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Motion control design of the BEARCAT II mobile robot

Motion control design of the BEARCAT II mobile robot

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

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

ISBN: (纸本)0819434302

Motion control is one of the most critical factors in the design of a robot. The purpose of this paper is to describe the research for applying motion control principles for a mobile robot systems design, which is on going at the University of Cincinnati Robotics Center. The mobile robot was constructed during the 1998-1999 academic year, and called BEARCAT II. Its design has inherited many features of its predecessor, BEARCAT I, such as vision guidance, sonar detection and digital control. In addition, BEARCAT II achieved many innovative motion control features as rotating sonar, zero turning radius (ZTR), current control loop, and multi-level controller design (conventional control and fuzzy logic control). This paper will focus on the motion control design, development and programming for the vehicle steering control and rotating sonar systems. The systems have been constructed and tested at the 1999 International Ground Robotics Competition with the Bearcat II running an obstacle course for 153.5 feet and finishing fourth in the competition. The significance of this work is in the increased understanding of robot control and the potential application of autonomous guided vehicle technology for industry, defense and medicine. Keywords: Motion control, motion behavior, compensation, mobile robots.

关键词： Control systems Motion controllers Amplifiers computer programming Mobile robots Robotics Safety Vehicle control Control systems design Fuzzy logic

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WAVELET TRANSFORM IN-DEPTH RECOVERY 12

WAVELET TRANSFORM IN-DEPTH RECOVERY

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

作者： HOR, MK CHEN, JYM CHEN, KS ACAD SINICA INST INFORMAT SCITAIPEI 115TAIWAN

ISBN: (纸本)0819413208

In this paper, a number of spatial/spatial-frequency image representations are reviewed. Wavelets have recently generated much interest, both in applied areas as well as in more theoretical ones. Wavelet transform relative to some basic wavelets provides a flexible time- frequency window which automatically narrows when observing high frequency phenomena and widens when studying low frequency environments. As a result, it is suitable for visual information representation. Applications in computer vision such as image compression and image enhancement are examined. method is presented, in which, a N X N subimage is divided into a lot of N X 7 or N X 9 narrow image regions perpendicular to local fringe direction, and then each region is segmented by a corresponding threshold curve. Because the threshold curves can follow fringe's extremum changes, it can avoid the effect of the inhomogeneous grey level distribution caused by diffraction halo and accurate segmen space, a projection operator is used in the spatial-variant deconvolution. Nevertheless, experimental results show that this approximation mechanism can generate the depth map of different images successfully.

关键词： Wavelets Wavelet transforms Cameras computer vision technology Machine vision Image processing Robot vision robots Deconvolution Space operations

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PROGRESS IN HIGH-LEVEL EXPLORATORY vision 12

PROGRESS IN HIGH-LEVEL EXPLORATORY VISION

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

作者： BRAND, M NORTHWESTERN UNIV INST LEARNING SCIEVANSTONIL 60201

ISBN: (纸本)0819413208

We have been exploring the hypothesis that vision is an explanatory process, in which causal and functional reasoning about potential motion plays an intimate role in mediating the activity of low-level visual processes. In particular, we have explored two of the consequences of this view for the construction of purposeful vision systems: Causal and design knowledge can be used to (1) drive focus of attention, and (2) choose between ambiguous image interpretations. An important result of visual understanding is an explanation of the scene's causal structure: How action is originated, constrained, and prevented, and what will happen in the immediate future. In everyday visual experience, most action takes the form of motion, and most causal analysis takes the form of dynamical analysis. This is even true of static scenes, where much of a scene's interest lies in how possible motions are arrested. This paper describes our progress in developing domain theories and visual processes for the understanding of various kinds of structured scenes, including structures built out of children's constructive toys and simple mechanical devices.

关键词： Visualization Visual analytics Buildings robots computer vision technology Machine vision Motion analysis Pathology Robot vision Visual process modeling

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intelligent robots and computer vision X: algorithms and techniques

Intelligent Robots and Computer Vision X: Algorithms and Tec...

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intelligent robots and computer vision X: algorithms and techniques

ISBN: (纸本)0819407445

The conference materials contain 69 papers grouped into twelve sessions dealing with different topics in computer vision. Pattern recognition;human face recognition algorithms and systems;image processing including feature spaces, edge and contour methods, optical character recognition and morphology;Packaging, materials handling, software and manipulation;fuzzy image processing and image understanding are the main topics covered.

关键词： computer vision

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Improved single-camera stereo system for mobile robotics

Improved single-camera stereo system for mobile robotics

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

作者： Lovegrove, William P. McGary, Patrick D. Austin, Kelly Bob Jones Univ Greenville SC 29614 USA

ISBN: (纸本)9780819479327

A single-camera stereo vision system offers a greatly simplified approach to image capture and analysis. In the original study by Lovegrove and Brame, they proposed a novel optical system that uses a single camera to capture two short, wide stereo images that can then be analyzed for real-time obstacle detection. In this paper, further analysis and refinement of the optical design results in two virtual cameras with perfectly parallel central axes. A new prototype camera design provides experimental verification of the analysis and also provides insight into practical construction. The experimental device showed that the virtual cameras' axes possessed a deviation from parallel of less than 12 minutes (or 0.2 degrees). The calculation of distances to objects from the two overlapping images all showed errors smaller than the pixel resolution limitation. In addition, a barrel lens correction was used in processing the image to allow parallax distance determination in the whole horizontal view of the images.

关键词： stereo vision single camera stereo pair mobile robot obstacle detection computer vision

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Matching shape descriptions of objects

Matching shape descriptions of objects

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

作者： Shrikhande, N Kulkarni, M Cent Michigan Univ Dept Comp Sci Mt Pleasant MI 48859 USA

ISBN: (纸本)081944300X

A model of an object is an image consisting of features of die object. The input is a gray scale image from which features are computed. In his doctoral thesis [7] J. L. Chen used a model based approach for object recognition. His method is based on Rosin's work [26] for extraction of parts. Both model and scene features are contour based properties. Properties of each part such as area, compactness, convexity etc. are computed and used to match the scene image to the model. This paper extends the algorithm in several directions. The contours are improved using two passes over the initial input image. The notion of internal part or base of an object is introduced and used to normalize the part areas. Insignificant parts are merged with neighboring parts to provide a better segmentation of the scene. Interpretation trees are used to match scene to object. The algorithm is tested on simple hand drawn images and also images of buildings obtained from architectural databases.

关键词： computer vision object recognition image processing

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Flexible inline low cost inspection station

Flexible inline low cost inspection station

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

作者： Sung, Chen-Ko Fraunhofer Inst Informat & Data Proc IITB D-76131 Karlsruhe Germany

ISBN: (纸本)9780819479327

A possibility to reduce the investment costs is an improved functionality of the inspection station in order to awaken investors' interest to buy. A new concept for 2-D and 3-D metric and logical quality monitoring with a more accurate, flexible, economical and efficient inspection station has been developed and tested at IITB. The inspection station uses short- and wide-range sensors, an intelligent grip system and a so-called "sensor magazine" which make the inspection process more flexible. The sensor magazine consists of various sensor ports with various task-specific, interchangeable sensors. With the sensor magazine and the improved measuring methods, the testing periods and therefore the costs in factory can be substantially decreased.

关键词： Multi sensors wide- and short-range sensors intelligent grip system sensor magazine learning-capable evaluation processes flexible inline quality monitoring robot dynamic and automatic path planning

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Learning from biotechnology;milestones in the prenatal engineering of an intelligent optical sensor: the human eye.

Learning from biotechnology;milestones in the prenatal engin...

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

作者： Lauinger, N CORRSYS-DATRON Sensorsysteme GmbH (Germany)

ISBN: (纸本)081944300X

The analysis of the prenatal engineering of the human brain and more specifically that of the human eye may encourage new interpretations and better understanding of 'cortical' processors and lead to better ideas about how to built optical sensors. What human vision at its first processing stages realizes is an adaptive transformation of physical parameters from an 'outer' 4D-spatiotemporal into an 'inner' psychological world or its reciprocal projection and construction of an illusionary (inner or outer) world. The description of some of the most remarkable steps in the development of the human eye before birth, very critical for the optical functionalities in vision, will illustrate the new interpretations.

关键词： Eye Retina Diffraction Brain Diffraction gratings Cones Crystals Rods Sensors Biotechnology

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