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Browsing by Author "Frączek, Rafał"

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    Item type:Doctoral Dissertation, Access status: Open Access ,
    Analiza metod detekcji dyfrakcyjnych linii Kikuchiego
    (2005-05-10) (Data obrony: 2007) Frączek, Rafał
    Wydział Elektrotechniki, Automatyki, Informatyki i Elektroniki
    The Ph.D. dissertation is composed of two sections. The first one covers mathematical background of the utilized in further parts algorithms of digital image processing and data classification. The section includes the description of such methods as: Hough, Radon, wavelet, curvelet transforms, directional filters, support vector machine, neural networks and other techniques utilized by the author. The second section contains the description of the three, proposed by the author, algorithms of detection of Kikuchi lines. The first algorithm consists in scanning the entire image with a special mask. The second one makes use of the modified Hough transform. The last algorithm involves advanced techniques of the image processing such as curvelet transform, directional filters. The method also utilizes neural networks for data classification. The Ph.D thesis is concluded with the presentation of both the results obtained during tests of the efficiency of the algorithms and original author's achievements.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Parallelized algorithms for finding similar images and object recognition
    (Wydawnictwa AGH, 2013) Frączek, Rafał; Cyganek, Bogusław; Wiatr, Kazimierz
    The paper addresses the issue of searching for similar images and objects in arepository of information. The contained images are annotated with the help of the sparse descriptors. In the presented research, different color and edge histogram descriptors were used. To measure similarities among images,various color descriptors are compared. For this purpose different distance measures were employed. In order to decrease execution time, several code optimization and parallelization methods are proposed. Results of these experiments, as well as discussion of the advantages and limitations of different combinations of metods are presented.
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    Item type:Thesis, Access status: Restricted ,
    Trójwymiarowa wizualizacja i edycja parametrów symulacji elementów elektroniki spinowej
    (Data obrony: 2019-01-21) Hałaciński, Roman
    Wydział Informatyki, Elektroniki i Telekomunikacji