Browsing by Subject "tarcie ślizgowe"

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Access status: Open Access ,
Analiza sekwencji obrazów śladów tarcia ślizgowego kompozytów PTFE
(Wydawnictwa AGH, 2006) Rudnicki, Zbigniew
In the paper methods of analysis of microscopic image sequences of steel countersample disk are presented. These images were recorded during sliding of the samples of PTFE composites in pin-on-disk tribotester. The sequences show variations of thin layer of transferred composite material - so called »transfer film« - important in sliding friction process. The applied methods of noise evaluation and filtration and the method of binarization threshold calculation - based on image percentiles are described. Binary image features - showing transfer film changes - are defined and extracted. The function aproximation of experimental data are made. Conclusions and postulations of further research are formulated.
Access status: Open Access ,
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.