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# Methods Calculating the Slab Radiance Factor

Budak, Vladimir P. and Efremenko, Dmitry S. (2020) Methods Calculating the Slab Radiance Factor. In: 30th International Conference on Computer Graphics and Machine Vision, GraphiCon 2020, pp. 1-13. MONOMAX Limited Liability Company. 30th International Conference on Computer Graphics and Machine Vision (GraphiCon 2020), 2020-09-22 - 2020-09-25, Saint Petersburg, Russia ONLINE. doi: 10.51130/graphicon-2020-2-3-16. ISSN 1613-0073.

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Official URL: http://ceur-ws.org/Vol-2744/paper16.pdf

## Abstract

One of the most critical problems of realistic visualization of the real-world objects is physically adequate modeling of their reflection of light. Reflection of light by objects occurs both from the surface and the bulk of matter (scattering). Accounting for the light reflection from the surface of objects was solved almost a century ago based on its representation as a Fresnel randomly rough surface. Scattering by a bulk of matter is the subject of radiation transfer theory, which has only recently received its known completion in the form of discrete transfer theory. Strict analytical methods for solving the radiation transport equation (RTE) are often not highly effective for calculating the radiance factor. For a long time, in the absence of effective numerical methods for solving problems and the unavailability of high-speed computers for practical calculations, approximate methods for solving RTE were developed. However, their accuracy and applicability limits were poorly defined. The discrete transfer theory allowed us to evaluate the existing approximate methods for solving the UPI, their accuracy, and the efficiency of application for calculating the radiance factor. It is shown that the most effective method is the method of synthetic iterations. The method is based on the selection of the solution anisotropic part based on a small-angle approximation of the RTE solution. The solution regular part can be calculated by any approximation. Then a simple iteration from the complete solution is performed to refine the angular distribution of the radiance factor.

Item URL in elib:https://elib.dlr.de/140175/
Document Type:Conference or Workshop Item (Speech)
Title:Methods Calculating the Slab Radiance Factor
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Budak, Vladimir P.Moscow Power Engineering Inst., Moscow, RussiaUNSPECIFIEDUNSPECIFIED
Efremenko, Dmitry S.UNSPECIFIEDhttps://orcid.org/0000-0002-7449-5072UNSPECIFIED
Date:2020
Journal or Publication Title:30th International Conference on Computer Graphics and Machine Vision, GraphiCon 2020
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
DOI:10.51130/graphicon-2020-2-3-16
Page Range:pp. 1-13
Editors:
EditorsEmailEditor's ORCID iDORCID Put Code
Bykovskii, SergeiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kustarev, PavelUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mouromtsev, DmitryUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Publisher:MONOMAX Limited Liability Company
ISSN:1613-0073
Status:Published
Event Title:30th International Conference on Computer Graphics and Machine Vision (GraphiCon 2020)
Event Location:Saint Petersburg, Russia ONLINE
Event Type:international Conference
Event Start Date:22 September 2020
Event End Date:25 September 2020
Organizer:ITMO
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Optical remote sensing
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Atmospheric Processors
Deposited By: Efremenko, Dr Dmitry
Deposited On:11 Jan 2021 10:17