Temat: digital processing - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: A modified K3M thinning algorithm
Autorzy:: Tabedzki, M.
Saeed, K.
Szczepański, A.
Powiązania:: https://bibliotekanauki.pl/articles/331149.pdf
Data publikacji:: 2016
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: skeletonization
thinning algorithm
K3M algorithm
digital image processing
szkieletyzacja
pocienianie
algorytm K3M
cyfrowe przetwarzanie obrazu
Opis:: The K3M thinning algorithm is a general method for image data reduction by skeletonization. It had proved its feasibility in most cases as a reliable and robust solution in typical applications of thinning, particularly in preprocessing for optical character recognition. However, the algorithm had still some weak points. Since then K3M has been revised, addressing the best known drawbacks. This paper presents a modified version of the algorithm. A comparison is made with the original one and two other thinning approaches. The proposed modification, among other things, solves the main drawback of K3M, namely, the results of thinning an image after rotation with various angles.
Źródło:: International Journal of Applied Mathematics and Computer Science; 2016, 26, 2; 439-450
1641-876X
2083-8492
Pojawia się w:: International Journal of Applied Mathematics and Computer Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: K3M: A universal algorithm for image skeletonization and a review of thinning techniques
Autorzy:: Saeed, K.
Tabędzki, M.
Rybnik, M.
Adamski, M.
Powiązania:: https://bibliotekanauki.pl/articles/907744.pdf
Data publikacji:: 2010
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: szkieletyzacja
obraz cyfrowy
przetwarzanie obrazu
przetwarzanie równoległe
skeletonization
thinning
digital image processing
parallelization
iteration
thinning methodologies
sequential thinning
parallel thinning
Opis:: This paper aims at three aspects closely related to each other: first, it presents the state of the art in the area of thinning methodologies, by giving descriptions of general ideas of the most significant algorithms with a comparison between them. Secondly, it proposes a new thinning algorithm that presents interesting properties in terms of processing quality and algorithm clarity, enriched with examples. Thirdly, the work considers parallelization issues for intrinsically sequential algorithms of thinning. The main advantage of the suggested algorithm is its universality, which makes it useful and versatile for a variety of applications.
Źródło:: International Journal of Applied Mathematics and Computer Science; 2010, 20, 2; 317-335
1641-876X
2083-8492
Pojawia się w:: International Journal of Applied Mathematics and Computer Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Optimal random sampling for spectrum estimation in DASP applications
Autorzy:: Tarczyński, A.
Qu, D.
Powiązania:: https://bibliotekanauki.pl/articles/908447.pdf
Data publikacji:: 2005
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: cyfrowe przetwarzanie sygnału
próbkowanie losowe
analiza spektralna
próbkowanie optymalne
digital alias-free signal processing
random sampling
spectral analysis
optimal sampling
Opis:: In this paper we analyse a class of DASP (Digital Alias-free Signal Processing) methods for spectrum estimation of sampled signals. These methods consist in sampling the processed signals at randomly selected time instants. We construct estimators of Fourier transforms of the analysed signals. The estimators are unbiased inside arbitrarily wide frequency ranges, regardless of how sparsely the signal samples are collected. In order to facilitate quality assessment of the estimators, we calculate their standard deviations. The optimal sampling scheme that minimises the variance of the resulting estimator is derived. The further analysis presented in this paper shows how sampling instant jitter deteriorates the quality of spectrum estimation. A couple of numerical examples illustrate the main thesis of the paper
Źródło:: International Journal of Applied Mathematics and Computer Science; 2005, 15, 4; 463-469
1641-876X
2083-8492
Pojawia się w:: International Journal of Applied Mathematics and Computer Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Parametric logarithmic type image processing for contrast based auto-focus in extreme lighting conditions
Autorzy:: Florea, C.
Florea, L.
Powiązania:: https://bibliotekanauki.pl/articles/329911.pdf
Data publikacji:: 2013
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: logarithmic image processing
digital camera
autofocus
logarytmiczne przetwarzanie obrazów
aparat cyfrowy
Opis:: While most of state-of-the-art image processing techniques were built under the so-called classical linear image processing, an alternative that presents superior behavior for specific applications comes in the form of Logarithmic Type Image Processing (LTIP). This refers to mathematical models constructed for the representation and processing of gray tones images. In this paper we describe a general mathematical framework that allows extensions of these models by various means while preserving their mathematical properties. We propose a parametric extension of LTIP models and discuss its similarities with the human visual system. The usability of the proposed extension model is verified for an application of contrast based auto-focus in extreme lighting conditions. The closing property of the named models facilitates superior behavior when compared with state-of-the-art methods.
Źródło:: International Journal of Applied Mathematics and Computer Science; 2013, 23, 3; 637-648
1641-876X
2083-8492
Pojawia się w:: International Journal of Applied Mathematics and Computer Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Notes on a linguistic description as the basis for automatic image understanding
Autorzy:: Tadeusiewicz, R.
Ogiela, M. R.
Szczepaniak, P. S.
Powiązania:: https://bibliotekanauki.pl/articles/907865.pdf
Data publikacji:: 2009
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: rozumienie automatyczne
widzenie komputerowe
obraz cyfrowy
semantyka
przetwarzanie obrazu
automatic understanding
computer vision
digital image
semantics
image processing
Opis:: The main paradigm of image understanding and a concept for its practical machine realisation are presented. The crucial elements of the presented approach are the formalisation of human knowledge about the class of images that are to be automatically interpreted, a linguistic description and the realization of cognitive resonance.
Źródło:: International Journal of Applied Mathematics and Computer Science; 2009, 19, 1; 143-150
1641-876X
2083-8492
Pojawia się w:: International Journal of Applied Mathematics and Computer Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Detection of moving objects in image sequences using 3D velocity filters
Autorzy:: Schauland, S.
Velten, J.
Kummert, A.
Powiązania:: https://bibliotekanauki.pl/articles/908049.pdf
Data publikacji:: 2008
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: przetwarzanie sygnału
filtr prędkości
filtr ruchu
wykrywanie obiektu
filtr cyfrowy
multidimensional signal processing
velocity filters
motion filters
object detection
wave digital filters
Opis:: A movement analysis of objects contained in visual scenes can be performed by means of linear multidimensional filters, which have already been analyzed in the past. While the soundness of the results was convincing, interest in those systems declined due to the limited computational power of contemporary computers. Recent advances in design and implementation of integrated circuits and hardware architectures allow realizing velocity filters if the n-D system is carefully adapted to the analyzed problem. In this paper, the fundamental principles of visual scene analysis by linear multidimensional filters are examined with respect to possible sources of degradation. The extraction of movement information and its practical use are demonstrated using a wave digital filter (WDF) implementation.
Źródło:: International Journal of Applied Mathematics and Computer Science; 2008, 18, 1; 21-31
1641-876X
2083-8492
Pojawia się w:: International Journal of Applied Mathematics and Computer Science
Dostawca treści:: Biblioteka Nauki

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