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

共 664 条记录，以下是521-530 订阅

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VERTICES AND CORNERS - NORMALIZED AVERAGE DETECTION 12

VERTICES AND CORNERS - NORMALIZED AVERAGE DETECTION

引用

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

作者： MALIK, R REN, H STEVENS INST TECHNOL DEPT ELECT ENGN & COMP SCIHOBOKENNJ 07030

ISBN: (纸本)0819413208

Most of the information regarding the shape of polyhedral objects is preserved in the edges and the vertices of these objects. Gray level images of scenes containing such objects are often processed to extract edge and vertex information to produce equivalent line sketches. An accurate line sketch of a scene serves as an effective input to high level vision systems concerned with scene understanding or object recognition. The performance of these systems is therefore greatly dependent on the accuracy of the line sketch. The work reported in this paper addresses the issues associated with generating accurate line sketches from gray level images. The methods described here have been implemented and tested with real and synthetic images and are compared to other vertex or corner detection techniques. The performance of the vertex detector is assessed using simulation runs on images with varied signal-to-noise ratios. The computational performance of this algorithm is evaluated and assessed by operating directly on the gray-scale image.

关键词： computer vision technology Machine vision Robot vision robots Image segmentation Edge detection Corner detection Signal to noise ratio Image processing Feature extraction

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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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BEYOND PURE STATIC SHAPE IN FUNCTION-BASED OBJECT RECOGNITION 12

BEYOND PURE STATIC SHAPE IN FUNCTION-BASED OBJECT RECOGNITIO...

引用

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

作者： BOWYER, KW STARK, L UNIV S FLORIDA TAMPAFL 33620

ISBN: (纸本)0819413208

There has recently been growing interest in exploiting the concept of reasoning about function for object recognition. In a function-based approach to object recognition, recognition of an object means labeling it as belonging to some category of objects according to the function that it could serve. The few function-based recognition systems which have so far been described in the literature have all assumed that the input to the problem is a pure static shape description. By `pure' shape we mean that the only object property that the systems have reasoned about is their abstract shape. By `static' shape we mean that the systems have reasoned about an object from only a single (assumed rigid) abstract shape instance. This paper discusses some of the issues which must be addressed in extending the function-based approach to handle non-shape properties (such as material properties) and dynamic shape descriptions.

关键词： computer vision technology Machine vision Object recognition 3D modeling Visual process modeling Robot vision robots Aluminum Computing systems Shape analysis

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A REAL-TIME vision SYSTEM FOR A MOBILE ROBOT USING CHEAP HARDWARE 12

A REAL-TIME VISION SYSTEM FOR A MOBILE ROBOT USING CHEAP HAR...

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

作者： HORSWILL, I MIT AI LABCAMBRIDGEMA 02139

ISBN: (纸本)0819413208

In this paper I will describe work in progress on a low cost vision-based robot designed to give primitive tours. The system is very simple, robust and efficient, and runs on a hardware platform which could be duplicated for less than $10K. Much of the system's efficiency is due to its implicit knowledge about the structure and appearance of its environment. This knowledge is not represented explicitly but rather is encoded in the structure of the system. I will give an overview of the system, discuss the properties of its environment, and show how they can be used to simplify the design of the system. © 1993 SPIE.

关键词： Robot vision

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DESIGN AND IMPLEMENTATION OF A FUZZY-LOGIC YAW CONTROLLER 12

DESIGN AND IMPLEMENTATION OF A FUZZY-LOGIC YAW CONTROLLER

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

作者： WU, KC SWIFT, AHP CRAVER, WL CHANG, YC UNIV TEXAS DEPT MECH & IND ENGNEL PASOTX 79968

ISBN: (纸本)0819413208

This paper describes a fuzzy logic controller (FLC) designed and implemented to control the yaw angle of a 10 kW fixed speed teetered-rotor wind turbine presently being commissioned at the University of Texas at El Paso. The technical challenge of this project is that the wind turbine represents a highly stochastic nonlinear system. The problems associated with the wind turbine yaw control are of a similar nature as those experienced with position control of high inertia equipment like tracking antenna, gun turrets, and overhead cranes. Furthermore, the wind turbine yaw controller must be extremely cost-effective and highly reliable in order to be economically viable compared to the fossil fueled power generators.

关键词： Fuzzy logic Wind turbine technology Control systems Fuzzy systems robots computer vision technology Electroluminescence Machine vision Robot vision Complex systems

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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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SEQUENTIAL computer algorithms FOR PRINTED-CIRCUIT BOARD INSPECTION 12

SEQUENTIAL COMPUTER ALGORITHMS FOR PRINTED-CIRCUIT BOARD INS...

引用

12TH CONF ON intelligent robots AND computer vision : ACTIVE vision AND 3D METHODS

作者： HERNANDEZ, ME VILLALOBOS, JR JOHNSON, WC Univ. of Texas/El Paso (United States)

ISBN: (纸本)0819413216

Surface mounted technology (SMT) in automated assembly facilities requires the use of automatic surface-mount-device (SMD) placement machines. One of the problems involved in the electronic printed circuit board (PCB) assembly process is the verification of the SMD placement operation within tight tolerances. The high throughput of modern manufacturing lines along with the required accuracy demand the use of automatic inspection systems to verify SMD placement. Image complexity of the board makes the use of machine vision for the inspection process a difficult task. This is complicated by the fact that misclassification errors should be kept to a minimum. Additionally, it is desirable that the inspection results provide enough information to be used for statistical process control (SPC). The strategy adopted to solve this problem was to simplify the complexity of the image by means of special illumination devices. The simplified image was then suitable for analysis by simple processing, segmentation, and detection algorithms that, sequentially applied to the image, met the required repeatability and accuracy specifications for the inspection system. The scope of this paper is to describe the techniques explored by the authors to solve the SMD inspection problem in order to develop a working industrial SMD inspection system.

关键词： Inspection Machine vision Image segmentation Image processing computer vision technology Robot vision robots Light emitting diodes Detection and tracking algorithms Image processing algorithms and systems

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ESTABLISHING IDENTITY AND POSE OF OBJECTS FROM A LIBRARY USING RECIPROCAL BASIS-SET AND DIRECTION-OF-ARRIVAL techniques 12

ESTABLISHING IDENTITY AND POSE OF OBJECTS FROM A LIBRARY USI...

引用

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

作者： WRIGHT, CR VAZ, RF CYGANSKI, D WORCESTER POLYTECH INST DEPT ELECT & COMP ENGNMACHINE VIS LABWORCESTERMA 01609

ISBN: (纸本)0819413208

In many object recognition problems, the object to be identified is one of a fixed set (library) of objects. The problem of identifying which object is present then shares characteristics of the signal detection and parameter estimation problem: which signal is present and what are its parameters? The Reciprocal Basis Set/Direction of Arrival (RBS/DOA) technique is a recently developed technique for object pose determination. It uses a single, comprehensive analytic object model representing a suite of views of an object. Object orientation can be directly established from single 2-D views of the object, without a costly search of the pose parameter space, and without need for the views to be related by a geometric image transformation. This paper describes how one can construct reciprocal basis sets to simultaneously determine object identity and pose from a single 2-D image. Results are presented which demonstrate this ability for a single unknown pose parameter using synthetic and camera-acquired images.

关键词： Visual process modeling Machine vision computer vision technology Robot vision robots Wavefronts Error analysis Image processing Object recognition Signal detection

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IMAGE-CODING AND IMAGE ACTIVITY MEASUREMENT 12

IMAGE-CODING AND IMAGE ACTIVITY MEASUREMENT

引用

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

作者： KEISSARIAN, F IBRAHIM, MK DAEMI, MF UNIV NOTTINGHAM DEPT COMP SCIRECOGNIT ENGN GRPNOTTINGHAM NG7 2RDENGLAND

ISBN: (纸本)0819413208

In this paper, a novel image analysis technique is proposed, which may be performed prior to coding in order to decide what is the most significant information to encode. In the proposed system, the image to be coded is first partitioned into a large number of sub-blocks of N*N pixels. The blocks can then be stored into two major classes according to the level of the visual activity present. The classification is based on analyzing the local histogram within each sub-block. In this paper, we initially analyze the image blocks to separate uniform blocks from those that can be classified as non-uniform blocks. Adjacent uniform blocks with the same statistics are merged to form large blocks. These blocks can then be coded by their mean values. It is also shown that the non-uniform blocks may also be classified into three categories with different levels of activity.

关键词： Image compression Image quality Image analysis computer vision technology Machine vision Robot vision robots Image processing Statistical analysis Image transmission

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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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