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1
Content available Efficient rendering of caustics with streamed photon mapping
Guzek K., Napieralski P.
Bulletin of the Polish Academy of Sciences. Technical Sciences
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2017
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Vol. 65, nr 3
361--368
EN
In this paper, we present the streamed photon mapping method for enhancing the rendering of caustics. In order to achieve a realistic caustic effect, global illumination methods require additional data, which are gathered by creating a caustic map or increasing the number of samples used for rendering. Our method employs a stream of photons with a varying luminance level depending on the material properties of the surface. The application of a concentrated photon stream provides the ability to render caustics effectively without increasing the number of photons in a photon map. Such an approach increases visibility of results, while also allowing for faster computations.
2
Content available remote Rendering participating media with streamed photon mapping
Guzek K., Napieralski P.
Journal of Applied Computer Science
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2016
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Vol. 24, nr 1
7--15
EN
The research on Streamed Photon Mapping method has shown its efficiency and potential. Significant caustic effects without an additional caustic map are its undeniable advantage. The method assumed that light spreads in a vacuum; however, such approach excluded the visualization of such phenomena as fog, smoke, or clouds. This paper presents a modification of the basic method of rendering with the help of photon streams, taking into account the simulation of light in dense mediums. The specifics of stream structure and the applied solutions allow to eliminate multiple assessment of the same photons as it occurred in the case of standard Volumetric Photon Mapping.
3
Content available remote Markerless assisted rehabilitation system
Binkowski M., Guzek K., Napieralski P.
Journal of Applied Computer Science
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2013
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Vol. 21, nr 2
7--19
EN
The project focuses on the use of modern technology to analyze human movement. This analysis turns out to be useful aid for physicians in rehabilitation of patients with limb injuries. This method is more precise than simple observation of the patient through the organ of sight. The proposed system allows markerless determination of deviations between the selected bones and joints, and as a result do not require specialized and expensive equipment. The implemented application presents instructional animation of the exercises and verify the correctness of its performance in real time. The equipment that meets the requirements of the project is the Microsoft Kinect, which is nowadays widely used in the medical field.
4
Content available remote Interactive visualization of magnetic fields
Napieralski P., Guzek K.
Journal of Applied Computer Science
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2013
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Vol. 21, nr 1
107--117
EN
In this paper, we present an interactive method for visualizing three-dimensional nonlinear, unsteady vector fields. Visualization of three-dimensional electromagnetic fields is a difficult issue because the user has to be able to assess the distribution of the vector in the context of complex geometry. The authors propose a novel scheme to visualize the flow of vectors.
5
Content available remote Nasi już tu byli!
Kielar A., Guzek K.
Geodeta : magazyn geoinformacyjny
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2012
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nr 4
58-61
6
Streamed Photon Mapping
Guzek K., Napieralski P.
Metody Informatyki Stosowanej
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2011
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nr 4
67-74
EN
In this paper, we present a new solution for Global Illumination – an extended photon mapping algorithm. Our technique replaces samples technique in traditional photon mapping as well as the manner of photon map construction. Our approach avoids emitting unneeded photons and decreased computation time. The proposed approach allows one to reduce the number of comparisons when searching for neighbouring photons in order to calculate the final colour of the pixel.
7
Content available Measurement of noise in the Monte Carlo point sampling method
Guzek K., Napieralski P.
Bulletin of the Polish Academy of Sciences. Technical Sciences
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2011
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Vol. 59, nr 1
15-19
EN
This paper gives a concise overview of the techniques we have used to find out the degree of measuring the quality of rendered images and a level of noise in particular. First part of the paper presents designed and conducted psychophysical experiment involving human subjective judgment. Then, two of the existing numerical image comparison methods are considered in the context of assessing the level of noise produced by global illuminations algorithms. The results of the participants’ subjective responses are correlated with the data obtained from objective mathematical metrics. The main goal of research was to determine the objective and perceptual measure of quality for images with fixed sampling strategy. The results will help to establish the measures of identifying the human perception in the assessment of images generated with global illumination algorithms.
8
Content available Rezerwaty Morskie - droga do odrodzenia Bałtyku
Guzek K.
Problemy Ekologii
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2008
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R. 12, nr 4
224-225
PL
Przyczynami degradacji Bałtyku są eutrofizacja, nadmierne rybołówstwo i kłusownictwo. Zapobiec temu mogą rezerwaty morskie.
EN
The main reasons of the Baltic Sea degradation include eutrophisation, excessive fishing and poaching. These phenomena can be prevented by establishing marine reservation areas.
9
Wykorzystanie biomasy na cele energetyczne w Polsce
Guzek K., Pisarek M.
Czysta Energia
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2002
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Nr 2
6-7
10
Jak wyciszono stację wentylatorów głównego przewietrzania w KWK 'Kazimierz-Juliusz'
Guzek K.
WUG : bezpieczeństwo pracy i ochrona środowiska w górnictwie
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1998
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nr 2
39-40
PL
Mieszkańcy domów sąsiadujących z szybem wentylacyjnym 'Kazimierz V' w KWK 'Kazimierz-Juliusz' - odetchnęli. Dzięki modernizacji zlokalizowanej tutaj stacji głownegoprzewietrzania, wyciszono hałaśliwość wentylatorów. Zbiegła się ona z jednoczesnymi zmianami układu wentylacyjnego w podziemiach kopalni. Autorzy dzielą się doświadczeniami, które okazać się mogą wielce przydatne w innych kopalniach, borykających się z podobnymi problemami.
EN
The residents of the houses adjacent to the 'Kazimierz V' ventilation shaft of 'Kazimierz-Juliusz' Colliery have made a sigh. Thanks to modernization of the main ventilation station located here the noise of fans has been silenced. This has coincided with alterations made in the underground mine ventilation system. Here, the authors share various aspects of their experience which may prove very useful in other mines that struggle with similar problems.
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