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20th Annual SPIE conference on Machine Vision Applications in Industrial Inspection

作者： FINNEY, GB GOMM, JB WILLIAMS, D ATKINSON, JT LIVERPOOL JOHN MOORES UNIV SCH ELECT & ELECTR ENGNLIVERPOOL L3 3AFENGLAND

ISBN: (纸本)0819414786

Automated ceramic tableware inspection displays many of the problems associated with automated inspection. A large number of possible faults must be considered, further complicated by the large variety of patterns with which the tableware is decorated. A hierarchical approach is taken in this work involving several levels of feature extraction and classification. Faults are detected, evaluated and the item as a whole is classified as a function of the combined fault measurements. Faults can be categorized as visual, surface, and structural. This paper concentrates on one visual fault known as shading variation, a result of color pigments registering as light, dark, or irregular. This fault is evaluated by analysis of the image intensity histogram. The histogram displays characteristics which vary with shading. Deviations from the standard are evaluated and the results passed onto a further classification stage which takes results from other feature extraction stages to give an overall evaluation of the item under inspection.

关键词： Inspection Neural networks Ceramics visualization Feature extraction Binary data Reflection Control systems visual optics Image analysis

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FLEXIBLE INDUSTRIAL INSPECTION OF SURFACE-DEFECTS USING A TRANSPUTER IMAGE-PROCESSING SYSTEM

FLEXIBLE INDUSTRIAL INSPECTION OF SURFACE-DEFECTS USING A TR...

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20th Annual SPIE conference on Machine Vision Applications in Industrial Inspection

作者： ZEICHEN, G HUFNAGL, H BERGER, M UNIV TECHNOL VIENNA INST FLEXIBLE AUTOMATVIENNAAUSTRIA

ISBN: (纸本)0819414786

This paper describes an image-based inspection system for surface defects, implemented on a transputer system with a high- performance transfer bus to provide fast access to large blocks of data. data-level parallelism (the image pixel data is partitioned horizontally into slices) and task-level parallelism (the algorithms themselves can be parallelized) are utilized. Surface defects and anomalies are detected by a texture-based segmentation procedure. In the training phase the objects of interest are marked and all feature vectors implemented in the system are computed. The system uses simple statistical features, features calculated from the cooccurrence matrix, features based on texture spectrum and the fractal dimension. The time critical run phase is realized on a parallel computer. The implementation is done fully in software, allowing flexibility in the use of features and window sizes for pixel descriptors and freedom in the use of various classifier-methods. The processing speed of the segmentation system is easily scalable with the number of processing units. The performance of the system is demonstrated on an industrial visual inspection task, the recognition of surface defects of aluminium cast workpieces, where a connectionist classifier is used for pixel classification.

关键词： Image processing Inspection Image segmentation Feature extraction Defect inspection Optical inspection Computing systems Neural networks Aluminum Fractal analysis

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An air-to-air Situationally Interactive Combat Model (SICM)

An air-to-air Situationally Interactive Combat Model (SICM)

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IEEE National conference on Aerospace and Electronics (NAECON)

作者： D.R. Hall F.C. Betts WL/FIPT USA

This paper discusses the Situationally Interactive Combat Model (SICM), a user-friendly air-to-air combat engagement model that is used to perform analyses of offensive and defensive tactics employment, changes to avionics suite components and aircraft capabilities, and changes of air-to-air armament systems. The inputs to the model are the performance parameters of the many disparate elements that comprise airborne weapon systems, and the outputs are various types of measures of engagement-level effectiveness. SICM supports the modeling of all sensor systems and the fusion of sensor data. The modeling techniques allow for rapid prototyping and for the very low cost method of evaluating new ideas and development strategies. Although originally designed for beyond visual range (BVR) engagements, improvements in graphical display of the engagements and maneuvering of aircraft have expanded SICM's capabilities to include the performance and display of close in combat (CIC). This model has supported the Advanced Tactical Fighter (ATF) Milestone I Cost and Operational Effectiveness analysis (COEA), the Integrated Electronic Warfare System (INEWS) Milestone I COEA, the Mark XV Identification Friend or Foe (IFF) Milestone ii COEA, and a number of marginal utility analyses for Wright Laboratory, WPAFB, Ohio. SICM is the model of choice for analysts due to its ease of use, user interactivity, speed of execution, sensor identification capabilities, and engagement modeling fidelity.< >

关键词： Aerospace electronics Aircraft Sensor systems Costs Displays Performance analysis Employment Weapons Sensor fusion Prototypes

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Rapid exploration of curvilinear grids using direct volume rendering 4

Rapid exploration of curvilinear grids using direct volume r...

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4th Annual IEEE conference on visualization, VIS 1993

作者： Van Gelder, Allen Wilhelms, Jane Computer and Information Sciences University of California Santa CruzCA95064 United States

ISBN: (纸本)0818639407

Fast techniques for direct volume rendering over curvilinear grids (common to computational fluid dynamics and finite element analysis) are developed. Three new projection methods that use polygon-rendering hardware for speed are presented and compared with each other and with previous methods for tetrahedral grids and rectilinear grids. A simplified algorithm for visibility ordering, based on a combination of breadth-first and depth-first searches, is described. A new multi-pass blending method is described that reduces visual artifacts that are introduced by linear interpolation in hardware where exponential interpolation is needed. visualization tools that permit rapid data banding and cycling through transfer functions, as well as region restriction, are described. © 1993 IEEE.

关键词： Blending

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SCIENTIFIC visualIZATION OF CHESAPEAKE BAY WATER-QUALITY data USING A GEOGRAPHIC INFORMATION-SYSTEM MOVIE

SCIENTIFIC VISUALIZATION OF CHESAPEAKE BAY WATER-QUALITY DAT...

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State-of-the-Art Mapping conference

作者： RIGTERINK, PV BAHNER, LH COMP SCI CORP ROCKVILLEMD 20850

ISBN: (纸本)0819411795

This paper examines the use of scientific visualization techniques and a geographic information system (GIS)-based `movie' to examine the Chesapeake Bay water quality data. Following the suggestion of Knapp (1992) and Buttenfield and Ganter (1990), the paper follows the framework of problem identification, data analysis, illustration, and decision making. The images shown in the demonstration are volumetric interpolation model results. The model result files were transferred to a Macintosh ii and visualized using a mapping and visualization program. The resulting PICT files are then displayed sequentially by animation software.

关键词： Oxygen Phosphorus visualization Nitrogen Geographic information systems Scientific visualization Solid modeling data analysis Error analysis visual process modeling

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Towards a unified visual database access

Towards a unified visual database access

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Proceedings of the 1993 ACM SIGMOD International conference on Management of data

作者： Vadaparty, K. Aslandogan, Y.A. Ozsoyoglu, G. Case Western Reserve Univ Cleveland United States

ISBN: (纸本)0897915925

Since the development of QBE, over fifty visual query languages have been proposed to facilitate easy database access. Although these languages have introduced some very useful paradigms, a number of these have some severe limitations, such as: (a) not extending beyond the relational model (b) not considering negation and safety, formally (c) using ad hoc constructs, with no analysis of expressivity or complexity done, etc. Note that visual database access is an important issue being revisited, with the emergence of different flavors of object-oriented databases. We believe that there is a need for developing a unified visual query language. Specifically, our goal is to develop a visual query language that has the following properties: (i) It has a few core constructs using which 'expert-users' can define new (derived) constructs easily (ii) 'Normal users' can use easily either the core or the derived constructs for database querying (iii) It can implement representative constructs of other (textual or visual) query language straightforwardly, and (iv) It has formal semantics, with its theoretical properties, such as complexity, analyzed. We believe that we make a first step towards the above goal by introducing a new logical construct called restricted universal quantifier and combining it with the hierarchical structure of windows to develop a visual Query Language, called VQL. The core constructs of VQL can encode easily a number of representative constructs of different (about six visual and four non-visual) relational, nested and object-oriented query languages. We also study the theoretical aspects such as safety, complexity, etc., of VQL.

关键词： Query languages

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Rapid exploration of curvilinear grids using direct volume rendering 93

Rapid exploration of curvilinear grids using direct volume r...

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IEEE conference on visualization

作者： A. Van Gelder J. Wilhelms Computer and Information Sciences University of California Santa Cruz CA USA

ISBN: (纸本)9780818639401

关键词： Hardware Grid computing Interpolation Rendering (computer graphics) Physics computing data visualization Costs Ear Computational fluid dynamics Information analysis

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Towards a unified visual database access 93

Towards a unified visual database access

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Proceedings of the 1993 ACM SIGMOD international conference on Management of data

作者： K. Vadaparty Y. A. Aslandogan G. Ozsoyoglu Department of Computer Engineering and Science Case Western Reserve University Cleveland OH

ISBN: (纸本)9780897915922

Since the development of QBE, over fifty visual query languages have been proposed to facilitate easy database access. Although these languages have introduced some very useful paradigms, a number of these have some severe limitations, such as: (a) not extending beyond the relational model (b) not considering negation and safety, formally (c) using ad hoc constructs, with no analysis of expressivity or complexity done, etc. Note that visual database access is an important issue being revisted, with the emergence of different flavors of object-oriented databases. We believe that there is a need for developing a unified visual query ***, our goal is to develop a visual query language that has the following properties: (i) It has a few core constructs using which “expert-users” can define new (derived) constructs easily (ii) “Normal users” can use easily either the core or the derived constructs for database querying (iii) It can implement representative constructs of other (textual or visual) query language straightforwardly, and (iv) It has formal semantics, with its theoretical properties, such as complexity, *** believe that we make a first step towards the above goal by introducing a new logical construct called restricted universal quantifier and combining it with the hierarchical structure of windows to develop a visual Query Language, called VQL. The core constructs of VQL can encode easily a number of representative constructs of different (about six visual and four non-visual) relational, nested and object-oriented query languages. We also study the theoretical aspects such as safety, complexity, etc., of VQL.

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AIAA Space Programs and Technologies conference, 1992

AIAA Space Programs and Technologies Conference, 1992

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AIAA Space Programs and Technologies conference, 1992

The proceedings contain 299 papers. The special focus in this conference is on Space Programs and Technologies. The topics include: Spacelab life sciences 1 results;extended duration orbiter - meeting the challenge David saucier;day-of-launch I-load updates for the space shuttle;national launch system comparative economic analysis;system cost modeling - an integrated approach;cost-optimized launch vehicle design;evolutionary lunar systems for human exploration;impact of restructuring on space station freedom assembly sequence;space station freedom pre-integrated truss configuration;a visual display aid for planning rover traversals;the space test program;science data processing in the mission to planet earth era;defining and satisfying the computing requirements of the EOS scientific computing facilities at NASA/MSFC and the rationale for fundamental research in space biology.

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data-PROCESSING SOFTWARE FOR ELECTROPHYSIOLOGICAL visual exploration

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COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 1989年第2期28卷 101-109页

作者： GRALL, Y LEGARGASSON, JF RIGAUDIERE, F PIZZATO, M Service de Biophysique et Médecine Nucléaire Hôpital Lariboisière Paris France.

The software we have developed originated after careful study of a routine functional visual processing session. It has three objectives: (i) to have available a large library of data processing programs;(ii) to add to these electrophysiological results, automatically transferred into a file, a clinical record card, creating a personalized file for study of visual characteristics of each patient;(iii) to allow programs providing statistical studies, creation of groups based on the same clinical features and various comparisons between files or groups. The database now contains 5000 different files and the results of its use are very encouraging. Some results are presented, especially those of a study on multiple sclerosis. The goal of the operation is the creation, in the future, of an expert system.

关键词： visual database visual electrophysiology Signal analysis Clinical file Statistics

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