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

作者： FORTE, P BROWN, G BARNWELL, P MALYAN, R NETHERWOOD, P KINGSTON UNIV SCH COMP SCI & ELECTR SYSTKINGSTON THAMES KT1 2EESURREYENGLAND

An approach to image analysis is described consisting of five stages: edge detection, thresholding, linking, shape description and shape abstraction. The approach is illustrated by applying the steps to the problem of... 详细信息

ISBN: (纸本)0819413208

关键词： Inspection computer vision technology Machine vision Edge detection Robot vision robots Image analysis Image segmentation Shape analysis Telecommunications

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Color Image Processing for Date Quality Evaluation

Color Image Processing for Date Quality Evaluation

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

作者： Lee, Dah-Jye Archibald, James K. Brigham Young Univ Provo UT 84602 USA

ISBN: (纸本)9780819479327

Many agricultural non-contact visual inspection applications use color image processing techniques because color is often a good indicator of product quality. Color evaluation is an essential step in the processing and inventory control of fruits and vegetables that directly affects profitability. Most color spaces such as RGB and HSV represent colors with three-dimensional data, which makes using color image processing a challenging task. Since most agricultural applications only require analysis on a predefined set or range of colors, mapping these relevant colors to a small number of indexes allows simple and efficient color image processing for quality evaluation. This paper presents a simple but efficient color mapping and image processing technique that is designed specifically for real-time quality evaluation of Medjool dates. In contrast with more complex color image processing techniques, the proposed color mapping method makes it easy for a human operator to specify and adjust color-preference settings for different color groups representing distinct quality levels. Using this color mapping technique, the color image is first converted to a color map that has one color index represents a color value for each pixel. Fruit maturity level is evaluated based on these color indices. A skin lamination threshold is then determined based on the fruit surface characteristics. This adaptive threshold is used to detect delaminated fruit skin and hence determine the fruit quality. The performance of this robust color grading technique has been used for real-time Medjool date grading.

关键词： machine vision color mapping color grading Medjool date non-contact visual inspection

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LOCATING FACIAL FEATURES FOR AGE CLASSIFICATION 12

LOCATING FACIAL FEATURES FOR AGE CLASSIFICATION

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

作者： KWON, YH LOBO, ND UNIV CENT FLORIDA DEPT COMP SCIORLANDOFL 32816

ISBN: (纸本)0819413208

In this paper, we outline computations for visual age classification from facial images. For now, input images can only be classified into one of three age-groups: babies, adults, and senior adults. The computations are based on cranio-facial development theory, and wrinkle analysis. In the implementation, first primary features of the face are found, followed by secondary feature analyses. Preliminary results with real data are presented.

关键词： Mouth Eye Nose Iris computer vision technology Head Machine vision robots Robot vision Image classification

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Prototype system for automated sorting and removal of bags of hazardous waste

Proceedings of SPIE - The International Society for Optical ...

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Proceedings of SPIE - The International Society for Optical Engineering 1996年 2904卷 271-277页

作者： Howard, Ayanna M. Bekey, George A. Univ. of Southern California Pasadena CA USA

ISBN: (纸本)0819423068;9780819423061

In this paper, we present a low-cost vision based system for handling of hazardous waste in an unstructured environment. The prototype system described shows the feasibility of sorting and removal of randomly mixed and oriented flexible objects from a bin using inexpensive and widely available hardware. Our experiments show that the utilization of even the simplest constructs is sufficient for the manipulation of flexible objects.

关键词： computer vision

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Scatterometry for machine vision

Proceedings of SPIE - The International Society for Optical ...

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Proceedings of SPIE - The International Society for Optical Engineering 1996年 2904卷 505-516页

作者： Volcy, Jerry Dickerson, Stephen L. Georgia Inst. of Technology Atlanta GA USA

ISBN: (纸本)0819423068;9780819423061

Specifications and design are provided for a low-cost scatterometer build to study the relationship between optical scatter and image formation. Design principles and considerations are discussed as they relate to digital imaging. Specifications and instrument limitations both mechanical and optical are examined and certain design choices are explained. The process of calibrating the instrument is considered and methods of noise suppression both electronic and optical are discussed. Finally, some measured data is presented.

关键词： computer vision

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ACQUISITION OF RANGE IMAGES IN AN INTEGRATED vision SYSTEM ENVIRONMENT 12

ACQUISITION OF RANGE IMAGES IN AN INTEGRATED VISION SYSTEM E...

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

作者： WANI, MA BATCHELOR, BG UNIV WALES COLL CARDIFF COLL CARDIFFCARDIFF CF1 3NSS GLAMWALES

ISBN: (纸本)0819413208

The paper presents a simple laser based triangulation system to acquire range images. The problems of high speed serpentine/raster scanning and sensor-output bottle-neck are addressed here by using a thin plane fan of laser light, and a linear variable neutral density filter. It also proposes a Prolog based integrated vision system environment for acquisition, processing, and understanding of range images.

关键词： Image processing System integration Sensors Cameras Fluctuations and noise Machine vision Optical filtering computer vision technology Data acquisition robots

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INCORPORATING COLOR AND SPATIOTEMPORAL STEREOvision techniques FOR ROAD FOLLOWING

INCORPORATING COLOR AND SPATIOTEMPORAL STEREOVISION TECHNIQU...

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11TH CONF ON intelligent robots AND computer vision : algorithms, techniques, AND ACTIVE vision

作者： SUNG, E MYINT, T Nanyang Technological Univ. (Singapore)

ISBN: (纸本)0819410268

This paper proposes a method of implementing stereovision in existing mobile robot perception systems without having to solve the classical stereo correspondence problem. The proposed method makes use of the fact that tracking of features is an easier task than performing stereo correspondence. A two-view motion stereo system is implemented in which the correspondence between two cameras is found by temporal stereo tracking. The algorithm assumes an initial stereo match of homologous features seen in the two cameras but subsequently the algorithm reliably tracks each feature by use of accurate odometric information, and accurate 3-D information can be derived from each matched feature. The derived set of 3-D data (of points, lines, and regions) are then fed to a fast surface reconstruction algorithm for later stage interpretation. The proposed scheme can be added to existing mobile robot road following systems at little added cost.

关键词： Cameras Roads Image segmentation Detection and tracking algorithms robots Calibration Mobile robots computer vision technology Machine vision Robot vision

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MULTIRESOLUTION SEGMENTATION OF RANGE IMAGES BASED ON BAYESIAN DECISION-THEORY

MULTIRESOLUTION SEGMENTATION OF RANGE IMAGES BASED ON BAYESI...

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11TH CONF ON intelligent robots AND computer vision : algorithms, techniques, AND ACTIVE vision

作者： BOULANGER, P GODIN, G National Research Council Canada (Canada)

ISBN: (纸本)0819410268

This paper describes recent work on hierarchical segmentation of range images. The algorithm starts with an initial partition of small planar regions using a robust fitting method constrained by the detection of depth and orientation discontinuities. From this initial partition represented by an adjacency graph structure, we optimally group these regions into larger and larger regions until an approximation limit is reached. The algorithm uses Bayesian decision theory to determine the local optimal grouping and the geometrical complexity of the approximation surface. This algorithm produces a hierarchical structure that can be used to represent objects with a varying level of detail by scanning through the hierarchical structure generated. Experimental results are presented.

关键词： Image segmentation Image processing algorithms and systems Data modeling computer vision technology Error analysis Machine vision Robot vision robots Detection and tracking algorithms Signal to noise ratio

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Efficient discrimination of active lighting in machine vision

Efficient discrimination of active lighting in machine visio...

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

作者： Viitanen, J VTT Automation (Finland)

ISBN: (纸本)081944300X

A new optical arrangement is introduced for such applications of machine vision that need to discriminate structured laser lighting from stray ambient lighting. Instead of using transmissive filters that usually have high attenuation, a double reflective filter arrangement is presented. A combination of dielectric and metallic mirrors achieves steep stopband attenuation especially in the near infrared region where Si detectors are sensitive and common blackbody-like radiators have high spectral density. An additional advantage follows from the compact size of such a Maksutov-type mirror telescope. Compared to a corresponding refractive design, the length is reduced to less than half.

关键词： Light sources and illumination Machine vision Lithium Mirrors Optical filters Signal attenuation Active vision computer vision technology Robot vision robots

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Navigation by cooperating mobile robots

Navigation by cooperating mobile robots

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Conference on intelligent robots and computer vision XXII - algorithms, techniques and Active vision

作者： Schilling, KJ Julius Maximilians Univ Wurzburg Wurzburg Germany

ISBN: (纸本)081945561X

Cooperation between several mobile robots enables to address more complex tasks or to provide more robust performance. Navigation and localisation forms the basis for the coordination and autonomous behaviours of teams of mobile robots. Therefore analyses of the kinematics and of the sensor field of view for the different vehicles are summarized in order to characterize robust formations during movements. In this approach optimized robot formations with respect to the given sensor configurations are maintained by the control system during the joint motion towards the target. The application of this method for guidance by a navigator and for cooperative manipulation tasks is discussed and tested with mobile robot hardware.

关键词： navigation mobile robots robot cooperation sensor data fusion path planning control ranging sensors

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