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Browsing by Subject "image transformation"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Wykorzystanie kontrastu stosowanego w nieostrym maskowaniu
    (Wydawnictwa AGH, 2006) Vorobel, Roman; Stobińska, Magdalena
    The paper presents analysis of methods for image quality enhancement for increasing distinguish ability of the details. Methods for unsharp masking are emphasized. It is shown, that the relative local contrast can be the base for construction of unsharp masking methods. Optimization of Iow frequency image component transformation is proposed and discussed. Advisability of proposed solutions in the examples is verified.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Wykorzystanie metod kontrastu lokalnego do wykrywania krawędzi w obrazie
    (Wydawnictwa AGH, 2009) Vorobel, Roman; Stobińska, Magdalena; Przybyszewski, Krzysztof
    A simple method of edges detection have been described. It is based on the method of local contrast enhancement and it is distinguished by increased sensitivity of the brightness difference. It enables the edges detection even for a minimal brightness difference because of a more sensitivity method of the derivative calculations based on the relative differences between brightness levels. It is possible to use that method instead another ones, as Stobel's one for example, in more complicated calculations, as Canny's method, for example. These create a new possibility to increase a sensitivity of the edges detection methods.