3D shape and composition documentation of small metallic archeological objects by SEM

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F16%3AN0000232" target="_blank" >RIV/00023272:_____/16:N0000232 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378297:_____/16:00470922

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

3D shape and composition documentation of small metallic archeological objects by SEM

Popis výsledku v původním jazyce

Use of scanning electron microscopy (SEM) for documentation and study of small objects is well established technique for decades. The main reason of its popularity is unmatched combination of detail, magnification and depth of the view in comparison to other observation techniques. However the physical principle of SEM enables shape and topography of observed objects to be perceived, techniques for obtaining quantitative 3D data from the micrographs are getting more popular only in recent years. Among published approaches to 3D microimaging there is a method based on photometric stereo principle. This method has been made possible with the advent of detectors divided into quarters enabling the same micrograph scene to be rendered in four different ”illumination” setting – a necessary prerequisite for photometric stereo. Data obtained from four-quarter detector enable to reconstruct 3D topography of the surface and also enhanced surface atomic composition separated from influence of topography. The use of this technique is demonstrated on small metallic archeological objects yielding 3D surface data and composition enhanced map. It can be concluded that however the ”composition map” obtained this way is only semi-quantitative and cannot compete in precision and information content with element maps based on EDS, but the advantage is that the composition map is created with the same resolution as surface image and can be virtually spatially manipulated along with the obtained topography.

Název v anglickém jazyce

3D shape and composition documentation of small metallic archeological objects by SEM

Popis výsledku anglicky

Use of scanning electron microscopy (SEM) for documentation and study of small objects is well established technique for decades. The main reason of its popularity is unmatched combination of detail, magnification and depth of the view in comparison to other observation techniques. However the physical principle of SEM enables shape and topography of observed objects to be perceived, techniques for obtaining quantitative 3D data from the micrographs are getting more popular only in recent years. Among published approaches to 3D microimaging there is a method based on photometric stereo principle. This method has been made possible with the advent of detectors divided into quarters enabling the same micrograph scene to be rendered in four different ”illumination” setting – a necessary prerequisite for photometric stereo. Data obtained from four-quarter detector enable to reconstruct 3D topography of the surface and also enhanced surface atomic composition separated from influence of topography. The use of this technique is demonstrated on small metallic archeological objects yielding 3D surface data and composition enhanced map. It can be concluded that however the ”composition map” obtained this way is only semi-quantitative and cannot compete in precision and information content with element maps based on EDS, but the advantage is that the composition map is created with the same resolution as surface image and can be virtually spatially manipulated along with the obtained topography.

Druh

O - Ostatní výsledky

CEP obor

AL - Umění, architektura, kulturní dědictví

OECD FORD obor

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Projekt

<a href="/cs/project/DG16P02M022" target="_blank" >DG16P02M022: Analýza, popis a archivace souborných informací o vlastnostech předmětů kulturního dědictví a využití těchto informací v restaurátorské, konzervátorské a badatelské praxi</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů