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    Wyświetlanie 1-7 z 7
    Tytuł:
    Optical Filters’ Influence on Digital Image Quality in High Temperature Measurements of Surface Properties
    Autorzy:
    Fabijanska, A
    Sankowski, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/108736.pdf
    Data publikacji:
    2009
    Wydawca:
    Społeczna Akademia Nauk w Łodzi
    Tematy:
    digital image processing
    image quality
    optical filters
    image quantitative analysis
    image noise
    Opis:
    This paper is concerned with high temperature image quantitative analysis systems. Particular attention is paid to computerised system for surface properties (wetting angle and surface tension) determination. A brief description of the system is given. The specificity of the performed measurements based on images presenting heat-emitting objects is considered. Moreover, the significance of optical filters’ usage is explained. Infrared and neutral density filters are regarded. Influence of these filters on digital image quality is deliberated. Especially image noise presence is considered. The detailed analysis of noise properties change due filters usage is carried out. Finally, results of the analysis are presented and discussed.
    Źródło:
    Journal of Applied Computer Science Methods; 2009, 1 No. 2; 53-63
    1689-9636
    Pojawia się w:
    Journal of Applied Computer Science Methods
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Salt and pepper noise reduction and edge detection algorithm based on neutrosophic logic
    Autorzy:
    Arulpandy, P.
    Trinita Pricilla, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1839286.pdf
    Data publikacji:
    2020
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    neutrosophic set
    digital image processing
    image analysis
    image denoising
    edge detection
    Opis:
    Neutrosophic set (NS) is a powerful tool to deal with indeterminacy. In this paper, the neutrosophic set is applied to the image domain and a novel edge detection technique is proposed. Noise reduction of images is a challenging task in image processing. Salt and pepper noise is one kind of noise that affects a grayscale image significantly. Generally, the median filter is used to reduce salt and pepper noise; it gives optimum results while compared to other image filters. Median filter works only up to a certain level of noise intensity. Here we proposed a neighborhood-based image filter called nbd-filter, it works perfectly for gray image regardless of noise intensity. It reduces salt and pepper noise significantly at any noise level and produces a noise-free image. Further, we proposed an edge detection algorithm based on the neutrosophic set, it detects edges efficiently for images corrupted by noise and noise-free images. Since most of the real-life images consists of indeterminate regions, neutrosophy is a perfect tool for edge detection. The main advantage of the proposed edge detector is, it is a simple and efficient technique and detect edges more efficient than conventional edge detectors.
    Źródło:
    Computer Science; 2020, 21 (2); 179-195
    1508-2806
    2300-7036
    Pojawia się w:
    Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identyfikacja tożsamości z wykorzystaniem analizy geometrii dłoni
    Identification of persons using hand geometry analysis
    Autorzy:
    GOMÓŁKA, Zbigniew
    TWARÓG, Bogusław
    ŻESŁAWSKA, Ewa
    Powiązania:
    https://bibliotekanauki.pl/articles/456362.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Rzeszowski
    Tematy:
    identyfikacja biometryczna
    cyfrowe przetwarzanie obrazów
    biometric identification system
    digital image processing
    hand geometry analysis
    Opis:
    W artykule przedstawiono zastosowanie analizy geometrii dłoni w systemie biometrycznym. Wykorzystując środowisko MATLAB i bibliotekę Image Processing, opracowano i przedstawiono przykładowy system identyfikacji.
    The paper presents the use of hand geometry analysis for biometric systems. Using Matlab environment and several techniques related to image processing, the exemplary application has been developed and presented.
    Źródło:
    Edukacja-Technika-Informatyka; 2016, 7, 4; 419-424
    2080-9069
    Pojawia się w:
    Edukacja-Technika-Informatyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Single-camera system for measuring paper deformations based on image analysis
    Autorzy:
    Pełczyński, Paweł
    Szewczyk, Włodzimierz
    Bieńkowska, Maria
    Powiązania:
    https://bibliotekanauki.pl/articles/1849045.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    digital image processing
    characteristic point tracking
    paper physical properties
    deformation analysis
    Poisson’s ratio
    Opis:
    The article presents a new technique for measuring paper deformation in unidirectional tensile tests, based on recording and analysis of a series of specimen images. The proposed technique differs from the DIC-based deformation measurement in that the cross-correlation of image data has been replaced with linear filtering. For this purpose, a regular grid of markers is printed on the sample. Filtering the image creates local maxima in the places where markers occur. The developed algorithm finds their location with sub-pixel accuracy. Printing a grid of markers on tested paper and use of reference objects visible in the same image as the paper sample, freed from the need to mechanically connect the camera and the universal testing machine and from the necessity to electronically synchronize their work. The obtained deformation distributions and Poisson’s ratios are in accordance with the literature data which confirms the correctness of the developed measurement technique.
    Źródło:
    Metrology and Measurement Systems; 2021, 28, 3; 509-522
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Single-camera system for measuring paper deformations based on image analysis
    Autorzy:
    Pełczyński, Paweł
    Szewczyk, Włodzimierz
    Bieńkowska, Maria
    Powiązania:
    https://bibliotekanauki.pl/articles/1849002.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    digital image processing
    characteristic point tracking
    paper physical properties
    deformation analysis
    Poisson’s ratio
    Opis:
    The article presents a new technique for measuring paper deformation in unidirectional tensile tests, based on recording and analysis of a series of specimen images. The proposed technique differs from the DIC-based deformation measurement in that the cross-correlation of image data has been replaced with linear filtering. For this purpose, a regular grid of markers is printed on the sample. Filtering the image creates local maxima in the places where markers occur. The developed algorithm finds their location with sub-pixel accuracy. Printing a grid of markers on tested paper and use of reference objects visible in the same image as the paper sample, freed from the need to mechanically connect the camera and the universal testing machine and from the necessity to electronically synchronize their work. The obtained deformation distributions and Poisson’s ratios are in accordance with the literature data which confirms the correctness of the developed measurement technique.
    Źródło:
    Metrology and Measurement Systems; 2021, 28, 3; 509-522
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Single-camera system for measuring paper deformations based on image analysis
    Autorzy:
    Pełczyński, Paweł
    Szewczyk, Włodzimierz
    Bieńkowska, Maria
    Powiązania:
    https://bibliotekanauki.pl/articles/1849104.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    digital image processing
    characteristic point tracking
    paper physical properties
    deformation analysis
    Poisson’s ratio
    Opis:
    The article presents a new technique for measuring paper deformation in unidirectional tensile tests, based on recording and analysis of a series of specimen images. The proposed technique differs from the DIC-based deformation measurement in that the cross-correlation of image data has been replaced with linear filtering. For this purpose, a regular grid of markers is printed on the sample. Filtering the image creates local maxima in the places where markers occur. The developed algorithm finds their location with sub-pixel accuracy. Printing a grid of markers on tested paper and use of reference objects visible in the same image as the paper sample, freed from the need to mechanically connect the camera and the universal testing machine and from the necessity to electronically synchronize their work. The obtained deformation distributions and Poisson’s ratios are in accordance with the literature data which confirms the correctness of the developed measurement technique.
    Źródło:
    Metrology and Measurement Systems; 2021, 28, 3; 509-522
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of efficiency of extraction of built-up areas in aerial images using fractal analysis and morphological granulometry
    Porównanie efektywności wyodrębniania terenów zabudowanych na obrazach lotniczych przy pomocy analizy fraktalnej i granulometrii morfologicznej
    Autorzy:
    Kupidura, P.
    Popławski, W.
    Sitko, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/132365.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Geograficzne
    Tematy:
    remote sensing
    mathematical morphology
    fractal analysis
    classification
    digital image processing
    teledetekcja
    morfologia matematyczna
    analiza fraktalna
    klasyfikacja
    cyfrowe przetwarzanie obrazów
    Opis:
    The paper presents a comparison of results of the automatic extraction of built-up areas, based on fractal analysis and granulometric maps, in the aerial images. Built-up areas as a land-use class can be clearly seen in an aerial or satellite image, due to its high granularity, but for the same reason they are very difficult to extract using a “traditional” non-contextual, pixel-based classification. Both approaches presented in the paper, using fractal analysis and morphological granulometry, base generally on a pixel-based classification, but performed on images reviously processed using these two types of processes. Fractal analysis consists in an empirical computing of fractal dimension of parts of an image, using a box-counting method. Such an approach generates an image where pixel values are equal to a fractal dimension values of their neighbourhood. Since we can interpret a fractal dimension as a level of granularity, a simple reclassification of such an image can improve a performance of an automatic extraction of built-up area effectively. The approach based on a morphological granulometry creates a number of granulometric maps – images where pixel values mean an amount of objects of certain size in a set neighbouring fragment of an image. This way a number of these images can be processed using a pixel-based classification, to perform an effective extraction of built-up areas in an image. The results of the presented approaches have been compared to the reference mask obtained basing on a visual interpretation of the image.
    Źródło:
    Teledetekcja Środowiska; 2015, 52; 29-37
    1644-6380
    Pojawia się w:
    Teledetekcja Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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