Automatyka
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ISSN 1429-3447
e-ISSN: 2353-0952
Issue Date
2005
Volume
T. 9
Number
Nr 3
Description
Journal Volume
Automatyka
T. 9 (2005)
Projects
Pages
Articles
Automatyczne wyznaczanie stref kolizji pojazdów
(Wydawnictwa AGH, 2005) Bubliński, Zbigniew; Mikrut, Zbigniew; Pawlik, Piotr
This paper describes the method of automatic detection of vehicles' collision zones based on analysis of video sequences registered by digital camera at signalised traffic intersection. Moving vehicles, visible on particular frames, are detected and their trajectories are stored. Tracks of vehicles which are moving in the same direction create some kind of »corridors« and overlaps of those »corridors« (common areas) are quite precise localisation of collision zones. The detailed description of algorithm and results obtained during analysis of selected video sequences is presented.
Implementacja procesu kwantyzacji w strukturach FPGA dla potrzeb kompresji obrazu
(Wydawnictwa AGH, 2005) Dąbrowska-Boruch, Agnieszka; Wiatr, Kazimierz
The Quantization is one of the basic method of a lossy compression. Moreover the quantization is used in standard algorithms of compression of still image (JPEG) and video compression algorithms (MPEG, H.26x). In case of compression's images algorithms the quantization is executed on coefficients received from the two-dimensional discrete cosine transform (2D-DCT) calculated on 8x8 pixels blocks. Paper presents basis of quantization's process in MPEG-2 standard and implementations results in FPGA chips (XCV200BG352 and XCV2P125FF1704).
Możliwość wykorzystania struktur fraktalnych do modelowania krzywych w grafice komputerowej
(Wydawnictwa AGH, 2005) Krupski, Marcin; Cader, Andrzej
Algorithms of curve generation operating with manual interface (e.g. computer mouse) are commonly used for creating computer graphics. Such methods use functions of different continuity classes (i.e. polynomials, Bezier's curves) to create a curve between given points. In many - esspecially artistic - applications, an urgency of generating not smooth line occurs, to get an effect of shading or tearing, the same as with use of simple artistic tools. In this paper a proposition of algorithm basing on non-smooth fractal curves that can gain such effect is presented. Original modification of well known fractal object - Koch's curve - is presented.
Ekstrakcja cech z sekwencji cyfrowych obrazów tarcia ślizgowego
(Wydawnictwa AGH, 2005) Mikrut, Zbigniew; Rudnicki, Zbigniew
In the paper some methods of image analysis of the sliding friction traces are presented. These images, made on steel disk by friction of PTFE composites, are of oriented structure. The so called »transfer film« consists of dark, thin smudges and the irregular spot-like objects. Taking into account the oriented image structure several features have been proposed based on analysis of the image projections (Radon transform). The top-hat transform was utilized to enhance local maxima - both in projection functions and in images. One-dimensional projection functions and an image as a whole have been binarized by using statistics-based thresholds.
Komputerowe wspomaganie diagnostyki w leczeniu powikłań stopy cukrzycowej
(Wydawnictwa AGH, 2005) Sędziwy, Adam
The article concerns the computer method of finding a size of the skin changes present in the diabetic foot complications. Comparison of the sizes found in such a manner, in the subsequent treatment stages, lets a physician to estimate a undertaken treatment efficiency.