Autor: Łagodziński, P. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Image segmentation and matting based on the extended distance transform
Autorzy:: Łagodziński, P.
Smołka, B.
Powiązania:: https://bibliotekanauki.pl/articles/333431.pdf
Data publikacji:: 2008
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: matowienie
przekształcenia zdalne
segmentacja
segmentation
matting
alpha-blending
distance transform
Opis:: In this paper we present a novel semi-automatic method for image segmentation and matting that utilizes the newly proposed generalized distance transform to determine the hybrid distance between the foreground and background regions within the image. This distance values are then used to estimate the alpha matting coefficient needed for composing new image by blending the foreground objects into a new background image scene. The effectiveness of the proposed algorithm allows the user to work interactively and to obtain the desired results promptly after marking the regions by scribbling the image. In the paper we show, that the proposed method yields satisfactory results for gray scale and colour images.
Źródło:: Journal of Medical Informatics & Technologies; 2008, 12; 151-156
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Medical image colorization
Autorzy:: Łagodziński, P.
Smołka, B.
Powiązania:: https://bibliotekanauki.pl/articles/333750.pdf
Data publikacji:: 2007
Wydawca:: Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:: koloryzacja
transformacja odległości
mieszanie kolorów
colorization
distance transformation
colour blending
Opis:: Colorization is a term used to describe a computerized process for adding colour to black and white pictures, movies or TV programs. This process involves replacing a scalar value that represents pixels' intensity or luminance by a vector in a three dimensional colour space with luminance, saturation and hue or simply RGB. The colorization process is also used to convert the grey scale to colour on medical images. Colour increases the visual appeal of an image and it also makes a medical visualization more attractive. Changes in colour are more easily perceived then changes in shades of grey and therefore this procedure makes the interpretation and understanding of the image easier. Since the mapping between intensity and colour has no inherently "correct" solution, human interaction and/or external information usually plays a large role. In this paper we present a novel colorization method that takes advantage of the morphological distance transformation and image structures to automatically propagate the colour scribbled by the user within the grey scale image. The effectiveness of the algorithm allows the user to work interactively and obtain the desired results promptly after providing the colour. In the paper we show that the proposed method allows for high quality colorization results for still images without precise segmentation.
Źródło:: Journal of Medical Informatics & Technologies; 2007, 11; 47-57
1642-6037
Pojawia się w:: Journal of Medical Informatics & Technologies
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: A combined numerical-experimental model of air foil bearing compliant structure
Autorzy:: Łagodziński, J.
Zieliński, P.
Powiązania:: https://bibliotekanauki.pl/articles/175400.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: airfoil bearing
numerical model
gas bearing coeﬃcients
Opis:: The paper concerns the development process of numerical-experimental model of air foil bearing compliant structure. Theoretically, static and dynamic characteristics of the foil bearing are the result of elastic combined properties of the two serially connected elements. One of them is a thin gas ﬁlm of very small thickness and relatively high static and dynamic stiﬀness. The second elastic element is a pretensioned bump foil spring. This paper focuses on the properties of compliant foil structure and leaves aside the gas ﬁlm behavior. At the beginning of the model development, the global stiﬀness and damping properties of compliant structure were obtained from the test stand measurements. In the next step, some assumptions concerning the model were made. The main one was the replacememy of the single bumps of the corrugated foil by the set of elastic-damping numerical elements. At last, the ﬁne-tuning of the model was carried out. The tuning involved changing of subelements local damping and stiﬀness properties, which in eﬀect inﬂuenced the global properties of foil bearing. The tuning criterion for the model was deﬁned as follows: the bearing global stiﬀness and damping properties of the model should not diﬀer from the experimentally obtained values more than 10%.
Źródło:: Transactions of the Institute of Fluid-Flow Machinery; 2016, 133; 117-129
0079-3205
Pojawia się w:: Transactions of the Institute of Fluid-Flow Machinery
Dostawca treści:: Biblioteka Nauki

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