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    Wyświetlanie 1-4 z 4
    Tytuł:
    Morphological discrimination of granular materials by measurement of pixel intensity distribution (PID)
    Autorzy:
    Wójcik, Artur
    Kościelniak, Piotr
    Mazur, Marcin
    Mathia, Thomas G.
    Powiązania:
    https://bibliotekanauki.pl/articles/221800.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    granular material
    digital image analysis
    pixel intensity distribution
    discrimination process control
    Opis:
    The paper provides statistical analysis of the photographs of four various granular materials (peas, pellets, triticale, wood chips). For analysis, the (parametric) ANOVA and the (nonparametric) Kruskal-Wallis tests were applied. Additionally, the (parametric) two-sample t-test and (non-parametric) Wilcoxon Rank-Sum Test for pairwise comparisons were performed. In each case, the Bonferroni correction was used. The analysis shows a statistical evidence of the presence of differences between the respective average discrete pixel intensity distributions (PID), induced by the histograms in each group of photos, which cannot be explained only by the existing differences among single granules of different materials. The proposed approach may contribute to the development of a fast inspection method for comparison and discrimination of granular materials differing from the reference material, in the production process.
    Źródło:
    Metrology and Measurement Systems; 2019, 26, 2; 297-308
    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/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
      Wyświetlanie 1-4 z 4

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