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Browsing by Subject "image analysis and processing"

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    Item type:Article, Access status: Open Access ,
    Pomiar parametrów pęcherzy gazu w kolumnie aeracyjnej z wykorzystaniem technik przetwarzania i analizy obrazów
    (Wydawnictwa AGH, 2007) Tomczak, Łukasz; Chałubiec, Joanna
    In this paper we try to develop a novel methodology for 3D reconstruction and measurement such parameters of gas bubbles as area and capacity, using image analysis techniques. Grey-scale image captured by a CCD camera consists of two sub images presenting two views in two planes of analyzed gas bubbles. The angle between them is equal 90 degrees. Thanks to it we are able to do bubbles reconstruction in 3D. Each of sub gray-scale image is processed separately. To receive their binary version we use: median filtration, edge detection, thresholding and morphological operation. In the next step algorithm fixes bubbles from two images to receive table containing two views of each analyzed bubble. In the next step each view of the bubble is approximated using ellipse to get parameters of ellipsoid which represents bubble in 3D. Finally each bubble is visualized in 3D and its area and capacities are calculated.