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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21-30 订阅

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An Effective Trace-Guided Wave-front Navigation and Map Building Approach for Autonomous Mobile robots

An Effective Trace-Guided Wave-front Navigation and Map Buil...

引用

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

作者： Luo, Chaomin Krishnan, Mohan Paulik, Mark Jan, Gene Eu Univ Detroit Mercy Dept Elect & Comp Engn Detroit MI 48221 USA Natl Taipei Univ Inst Elect Engn Taipei Taiwan

ISBN: (纸本)9780819499424

This paper aims to address a trace- guided real-time navigation and map building approach of an autonomous mobile robot. Wave-front based global path planner is developed to generate a global trajectory for an autonomous mobile robot. Modified Vector Field Histogram (M-VFH) is employed based on the LIDAR sensor information to guide the robot locally to be autonomously traversed with obstacle avoidance by following traces provided by the global path planner. A local map composed of square grids is created through the local navigator while the robot traverses with limited LIDAR sensory information. From the measured sensory information, a map of the robot's immediate limited surroundings is dynamically built for the robot navigation. The real-time wave-front based navigation and map building methodology has been successfully demonstrated in a Player/Stage simulation environment. With the wave-front-based global path planner and M-VFH local navigator, a safe, short, and reasonable trajectory is successfully planned in a majority of situations without any templates, without explicitly optimizing any global cost functions, and without any learning procedures. Its effectiveness, feasibility, efficiency and simplicity of the proposed real-time navigation and map building of an autonomous mobile robot have been successfully validated by simulation and comparison studies. Comparison studies of the proposed approach with the other path planning approaches demonstrate that the proposed method is capable of planning more reasonable and shorter collision-free trajectories autonomously.

关键词： Wave-front path planning trace-guided navigation map building global path panning LIDAR-based navigator

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CONVEX SHAPE REFINEMENT USING DYNAMIC-PROGRAMMING FOR SURFACE DEFECT CLASSIFICATION ON WOODEN MATERIALS 12

CONVEX SHAPE REFINEMENT USING DYNAMIC-PROGRAMMING FOR SURFAC...

引用

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

作者： POLZLEITNER, W JOANNEUM RES A-8010 GRAZAUSTRIA

This paper deals with a two-step segmentation algorithm for 2-D convex objects. First the objects are approximated by an elliptic shape description, and then the boundary of the object is refined using dynamic program... 详细信息

ISBN: (纸本)0819413208

关键词： computer programming Evolutionary algorithms computer vision technology Machine vision Robot vision robots Fuzzy logic Information operations Inspection Pattern recognition

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Using Short-wave Infrared Imaging for Fruit Quality Evaluation

Using Short-wave Infrared Imaging for Fruit Quality Evaluati...

引用

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

作者： Zhang, Dong Lee, Dah-Jye Desai, Alok Sun Yat Sen Univ Sch Informat Sci & Technol Guangzhou 510006 Guangdong Peoples R China Brigham Young Univ Dept Elect & Comp Engn Provo UT 84602 USA

ISBN: (纸本)9780819499424

Quality evaluation of agricultural and food products is important for processing, inventory control, and marketing. Fruit size and surface quality are two important quality factors for high-quality fruit such as Medjool dates. Fruit size is usually measured by length that can be done easily by simple image processing techniques. Surface quality evaluation on the other hand requires more complicated design, both in image acquisition and image processing. Skin delamination is considered a major factor that affects fruit quality and its value. This paper presents an efficient histogram analysis and image processing technique that is designed specifically for real-time surface quality evaluation of Medjool dates. This approach, based on short-wave infrared imaging, provides excellent image contrast between the fruit surface and delaminated skin, which allows significant simplification of image processing algorithm and reduction of computational power requirements. The proposed quality grading method requires very simple training procedure to obtain a gray scale image histogram for each quality level. Using histogram comparison, each date is assigned to one of the four quality levels and an optimal threshold is calculated for segmenting skin delamination areas from the fruit surface. The percentage of the fruit surface that has skin delamination can then be calculated for quality evaluation. This method has been implemented and used for commercial production and proven to be efficient and accurate.

关键词： Machine vision histogram analysis fruit grading Medjool date non-contact visual inspection short-wave infrared imaging

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Color Back Projection for Fruit Maturity Evaluation

Color Back Projection for Fruit Maturity Evaluation

引用

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

作者： Zhang, Dong Lee, Dah-Jye Desai, Alok Sun Yat Sen Univ Sch Informat Sci & Technol Guangzhou 510006 Guangdong Peoples R China Brigham Young Univ Dept Elect & Comp Engn Provo UT 84602 USA

ISBN: (纸本)9780819499424

In general, fruits and vegetables such as tomatoes and dates are harvested before they fully ripen. After harvesting, they continue to ripen and their color changes. Color is a good indicator of fruit maturity. For example, tomatoes change color from dark green to light green and then pink, light red, and dark red. Assessing tomato maturity helps maximize its shelf life. Color is used to determine the length of time the tomatoes can be transported. Medjool dates change color from green to yellow, and the orange, light red and dark red. Assessing date maturity helps determine the length of drying process to help ripen the dates. Color evaluation is an important step in the processing and inventory control of fruits and vegetables that directly affects profitability. This paper presents an efficient color back projection and image processing technique that is designed specifically for real-time maturity evaluation of fruits. This color processing method requires very simple training procedure to obtain the frequencies of colors that appear in each maturity stage. This color statistics is used to back project colors to predefined color indexes. Fruit maturity is then evaluated by analyzing the reprojected color indexes. This method has been implemented and used for commercial production.

关键词： Machine vision color back projection color grading tomatoes non-contact visual inspection

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Splinter detection of half-cut peaches

Splinter detection of half-cut peaches

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conference on intelligent robots and computer vision XVI - algorithms, techniques, Active vision, and Materials Handling

作者： Vizmanos, JG Fuentes, LM Gutierrez, JA Univ. de Valladolid (Spain) SIFISA (Spain)

A machine vision system has been developed to separate half cut peaches with small splinters from clean ones. The system uses the different spectral profile of both together with an ad hoc illuminating system. The sys... 详细信息

ISBN: (纸本)0819426407

关键词： machine vision real time processing peaches food industry

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Diffractive 3D phase gratings will qualify optical sensors and image processing technologies for reaching performances of human vision

Diffractive 3D phase gratings will qualify optical sensors a...

引用

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

作者： Lauinger, N CORRSYS DATRON Sensorsyst GMBH D-35578 Wetzlar Germany

Diffractive 2D and 3D grating optics as enabling technologies are on a good way to technically realize specific features well known in human vision. How does the human eye do its job in visual information processing?

ISBN: (纸本)0819438626

关键词： Diffraction gratings 3D image processing Diffraction RGB color model Human vision and color perception Eye 3D vision Cones Visualization Retina

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NEW ENTROPY OPERATOR FOR EDGE ABSTRACTION 12

NEW ENTROPY OPERATOR FOR EDGE ABSTRACTION

引用

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

作者： XIE, XH TIAN, XQ LUO, LM SOUTHEAST UNIV DEPT BIOMED ENGNNANJING 210018PEOPLES R CHINA

ISBN: (纸本)0819413208

This paper presents a new exponential behavior based entropy operator for extracting image edges. Edges can be detected by computing the entropy of brightness or hue in a local region of a picture. The entropy depends not only on the rate of change of brightness or hue, but also on the average brightness or hue. The experimental result verifies the efficiency of the new entropy operator.

关键词： Edge detection computer vision technology Image processing Machine vision Computing systems Image filtering Image segmentation Robot vision robots Image information entropy

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AUTOMATIC INSPECTION OF ELECTRONIC SURFACE-MOUNT ASSEMBLIES 12

AUTOMATIC INSPECTION OF ELECTRONIC SURFACE-MOUNT ASSEMBLIES

引用

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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LOCATING FACIAL FEATURES FOR AGE CLASSIFICATION 12

LOCATING FACIAL FEATURES FOR AGE CLASSIFICATION

引用

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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Navigation by cooperating mobile robots

Navigation by cooperating mobile robots

引用

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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