Temat: contour - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The method of signature recognition based on least squares contour alignment and windows technique
Autorzy:: Wróbel, K.
Doroz, R.
Powiązania:: https://bibliotekanauki.pl/articles/333909.pdf
Data publikacji:: 2010
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: rozpoznawanie podpisu
wyrównanie konturów najmniejszych kwadratów
signature recognition
windows technique
least squares contour alignment
Opis:: This paper presents a new method of recognizing handwritten signatures. Signature was treated as a collection of features of specific values. As features the values of x, y coordinates of signature points have been used. The method discussed in the paper is a modification of the method based on least squares contour alignment. This modification consists of dividing signatures into windows of the preset size and measuring the value of similarity between the windows according to their position in the signature. The effectiveness of the method was verified in practice. During the study, the influence of the parameters of the method on the obtained results was determined.
Źródło:: Journal of Medical Informatics & Technologies; 2010, 15; 35-39
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Hurwitz-Radon operator in monochromatic medical image reconstruction
Autorzy:: Jakóbczak, D.
Kosiński, W.
Powiązania:: https://bibliotekanauki.pl/articles/333775.pdf
Data publikacji:: 2007
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: kompresja
macierze Hurwitza-Radona
kontur
rekonstrukcja krzywej
tomografia
compression
Hurwitz-Radon matrix
contour
curve reconstruction
tomography
Opis:: In this paper the method, dedicated for medical images reconstruction, will be presented. One of them called the method of the Hurwitz-monochromatic (e.g. black and white) images. The method is based on a family of Hurwitz-Radon matrices. The matrices possess columns composed of orthonormal vectors. The operator of Hurwitz-Radon (OHR), built from that matrices, is described. It is shown how to create the orthogonal and discrete OHR and how to use it in a process of curve interpolation. The method needs suitable choice of nodes, i.e. points of the curve to be compressed: they should be equidistance in one of coordinates. Application of MHR gives a high level of compression (up to 99 %) and a very good interpolation accuracy in the process of reconstruction of contours. Its use in the computer tomography is also effective. Orthogonal OHR can be regarded as a linear and discrete model in the supervised (machine) learning [5]. It is shown how to use it in approximation of data. Created from the family of N-1 HR matrices and completed with the identical matrix, system of matrices is orthogonal only for vector spaces of dimensions N=2,4,8. Orthogonality of columns and rows is very important and significant for stability and high precision of calculations.
Źródło:: Journal of Medical Informatics & Technologies; 2007, 11; 69-78
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Visualization of 3-D objects in medicine - selected technical aspects for physicians
Autorzy:: Lewandowski, P.
Tomczyk, A.
Szczepaniak, P. S.
Powiązania:: https://bibliotekanauki.pl/articles/333771.pdf
Data publikacji:: 2007
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: wizualizacja obiektu 3D
renderowanie powierzchni
renderowanie objętości
renderowanie konturów
3D object visualization
surface rendering
volume rendering
contour rendering
Opis:: In the paper, selected visualization methods are described such as: surface rendering, volume rendering and the simplest approach basing on texture mapping. This work, however, does not aim at a detailed description of those methods but at a friendly presentation of possible ways of visualization and their features which can be of importance for a physician who has some expectations or needs, such as gaining insight into a 3-D object. Those expectations can be satisfied for example by making incisions or using surface transparency option which significantly improves visualization effect and can be of use in diagnostic process.
Źródło:: Journal of Medical Informatics & Technologies; 2007, 11; 59-67
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

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