Wyniki wyszukiwania - BazTech

1

Klasyfikacja sekwencji wizyjnych do określonych Uogólnionych Klas Użytkowania na podstawie wielkości celu i poziomu oświetlenia

Witkowski M., Leszczuk M., Dziech A.

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

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2012

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nr 8-9

646-650

PL

Przedstawiono badania mające na celu opracowanie algorytmów automatycznie klasyfikujących sekwencje wizyjne do wybranych Uogólnionych Klas Użytkowania (Generalized Use Classes - GUC) na podstawie wielkości obiektu i poziomu oświetlenia. Opisano badania przeprowadzone na ekspertach, za pomocą specjalnie stworzonego interfejsu oraz analizę uzyskanych wyników. Szczegółowo omówiono proponowany algorytm klasyfikujący sekwencje wizyjne oraz poddano go ocenie. Prace opisane w artykule były realizowane w ramach projektu INDECT.

EN

This paper presents the research devoted to development of algorithms for automatic classification of video sequences into specified Generalized Use Classes of target size and lighting level. The experiment conducted on the experts with a specially created interface, and the analysis of the obtained results are described first. Next, the developed algorithm that classifies video sequences, and its evaluation arę discussed. The research described in this paper was conducted under the INDECT project.

2

Matrix replica method and artificial neural networks as a component of condition assessment of materials for the power industry

Sroka M., Zieliński A.

Archives of Materials Science and Engineering

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2012

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Vol. 58, nr 2

130--136

EN

Purpose: use of matrix replica method and artificial neural networks in condition assessment of materials working under creep conditions. Demonstration of scanning electron microscopy usefulness for correct assessment of the occurrence of internal damages. Design/methodology/approach: For material after long-term service the microstructural investigations were carried out on metallographic specimens and matrix replicas using light and scanning electron microscope. A computer program was used for material condition assessment. Findings: The way of material condition assessment by matrix replica method using a computer program as an example of the application of computer materials science methods was presented. The correct development of methodology for assessment of the degree of internal damages in steel working under creep conditions was found a result of verification. Critical comments on condition assessment of structure observed using light microscopy were presented. Practical implications: The presented method can be used for evaluation and qualification of structural changes in power station boiler components operating in creep conditions. Originality/value: The presented results of changes in the mechanical properties, structure and in the precipitation processes are applied to evaluation the condition of the elements in further industrial service.

3

Use of Gabor filters for texture classification of airborne images and LiDAR data

Marmol U.

Archiwum Fotogrametrii, Kartografii i Teledetekcji

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2011

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Vol. 22

325--336

EN

In this paper, a texture approach is presented for building and vegetation extraction from LIDAR and aerial images. The texture is very important attribute in many image analysis or computer vision applications. The procedures developed for texture problem can be subdivided into four categories: structural approach, statistical approach, model based approach and filter based approach. In this paper, different definitions of texture are described, but complete emphasis is given on filter based methods. Examples of filtering methods are Fourier transform, Gabor and wavelet transforms. Here, Gabor filter is studied and its implementation for texture analysis is explored. This approach is inspired by a multi-channel filtering theory for processing visual information in the human visual system. This theory holds that visual system decomposes the image into a number of filtered images of a specified frequency, amplitude and orientation. The main objective of the article is to use Gabor filters for automatic urban object and tree detection. The first step is a definition of Gabor filter parameters: frequency, standard deviation and orientation. By varying these parameters, a filter bank is obtained that covers the frequency domain almost completely. These filters are used to aerial images and LIDAR data. The filtered images that possess a significant information about analyzed objects are selected, and the rest are discarded. Then, an energy measure is defined on the filtered images in order to compute different texture features. The Gabor features are used to image segmentation using thresholding. The tests were performed using set of images containing very different landscapes: urban area and vegetation of varying configurations, sizes and shapes of objects. The performed studies revealed that textural algorithms have the ability to detect buildings and trees. This article is the attempt to use texture methods also to LIDAR data, resampling into regular grid cells. The obtained preliminary results are interesting.

4

Optymalizacja zróżnicowania wartości wymiarów w systemach modułowych konstrukcji

Gendarz P.

Mechanik

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2010

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R. 83, nr 1/S

43-50

PL

Najwyższą formą uporządkowania rodziny konstrukcji są systemy modułowe konstrukcji. W celu ich racjonalnego tworzenia proponuje się, by zastosować optymalizację zróżnicowania wartości wymiarów, z zachowaniem relacji sprzężeń między współdziałającymi elementami. Podstawą jej realizacji jest automatyczna klasyfikacja (Cluster analyse). Spośród różnych metod automatycznej klasyfikacji wybrano hierarchiczną i iteracyjną, których celem jest utworzenie optymalnego układu klas. Kryterialny wybór reprezentantów klas pozwala tworzyć systemy modułowe konstrukcji złożonych środków technicznych ze wspomaganiem komputerowym.

EN

Basic problem of design in a way of production process is to assure serial manufacture. New requirements for construction process are oriented on using the newest solutions for design and also on putting the widest spectrum needs for specified class of technical means. It is possible by using modulus systems of design. In this written scientific issue you can find a trial of showing how to assure serial manufacture through aggregation of measurements values. Aggregation influences the amount of design; it means production of the biggest number of composition limited by design modulus.

5

Algorytm dekompozycji sieci transportowej

Cisowski T.

Pojazdy Szynowe

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2008

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Nr 2

14-18

PL

W pracy sformułowano zagadnienie wyboru optymalnej struktury sieci transportowej. Przedstawiono analizę istniejących metod optymalnej dekompozycji sieci. Zaproponowano przybliżony algorytm wyboru optymalnej struktury zarządzania siecią transportową oparty na analizie klasterowej i klasyfikacji automatycznej

EN

In this work the issue of choice of the optimum structure of the transport network is formulated. The analysis of the existing methods of the optimum decomposition of the network is presented. The approximate algorithm of choice of the optimum structure of managing the transport network based on the cluster analysis and automatic classification is proposed.

6

International Comparison of Occupational Safety and Health Research - A Review Based on Published Articles

Brueggmann M., Roetting M., Luczak H.

International Journal of Occupational Safety and Ergonomics

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2001

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Vol. 7, No. 4

387--401

EN

A comparison of international literature in occupational safety and health (OSH) research over the years from 1980 to 1998 was conducted. The comparison is based on the different languages of the over 35,000 articles, which were collected from different databases. The distribution of languages in the analyzed data has to be considered carefully with respect to the original purpose of the data collection and the specific role of the international publication language, English. The comparison shows that in several aspects OSH research does not differ in different publication languages. In some methodological aspects, and in specific objects of research, differences between articles published in different languages can be found.