Calibration and Visualization of Wall-Thickness and Porosity Distributions of Ceramics Using X-radiography and Image Processing
Identifieur interne : 001A61 ( Istex/Curation ); précédent : 001A60; suivant : 001A62Calibration and Visualization of Wall-Thickness and Porosity Distributions of Ceramics Using X-radiography and Image Processing
Auteurs : A. Pierret [France] ; C. J. Moran [Australie] ; L.-M. Bresson [France]Source :
- Journal of Archaeological Science [ 0305-4403 ] ; 1996.
Descripteurs français
- Wicri :
- topic : Science des sols.
English descriptors
- KwdEn :
- Academic press, Archaeological ceramics, Archaeological science, Carr, Carr riddick, Ceramic radiography, Ceramic technology, Ceramic wall properties, Courty roux, Density distribution, Density information, Digital images, Display convenience, Experimental material, Focal distance, Gravimetric, Gravimetric density, Grey level, Grey levels, Heterogeneity, Image processing, Incident intensity, Internal structure, Larger value, Leeuw, Local heterogeneities, Local variations, Ltered, Ltered image, Many dimensions, Mass absorption, Mathematical morphology, Mineral inclusions, Normal views, Perspective view, Pierret, Pixel, Pixel position, Pore, Pore space, Porosity, Porosity calibration, Porosity distribution, Porosity image, Porosity information, Porosity range, Preferred orientation, Radiography, Rencontres internationales, Roux, Same specimen, Sherd, Sherd orientation, Sherd thickness, Skilled potter, Small range, Smaller value, Soil science, Such features, Surface features, Temper particles, Terre cuite, Thickness image, Thickness images, Thickness information, Thickness variations, Upper parts, Vessel walls, Visual examination, Visualization, Wall thickness, Wall thickness variations, Wall-thickness.
- Teeft :
- Academic press, Archaeological ceramics, Archaeological science, Carr, Carr riddick, Ceramic radiography, Ceramic wall properties, Courty roux, Density distribution, Density information, Digital images, Display convenience, Experimental material, Focal distance, Gravimetric, Gravimetric density, Grey level, Grey levels, Heterogeneity, Image processing, Incident intensity, Internal structure, Larger value, Leeuw, Local heterogeneities, Local variations, Ltered, Ltered image, Many dimensions, Mass absorption, Mathematical morphology, Mineral inclusions, Normal views, Perspective view, Pierret, Pixel, Pixel position, Pore, Pore space, Porosity, Porosity calibration, Porosity distribution, Porosity image, Porosity information, Porosity range, Preferred orientation, Rencontres internationales, Roux, Same specimen, Sherd, Sherd orientation, Sherd thickness, Skilled potter, Small range, Smaller value, Soil science, Such features, Surface features, Temper particles, Terre cuite, Thickness image, Thickness images, Thickness information, Thickness variations, Upper parts, Vessel walls, Visual examination, Visualization, Wall thickness, Wall thickness variations.
Abstract
Abstract: It has been reported that X-radiography studies of archaeological ceramics can be used to identify fashioning processes. However, diagnostic criteria used for such interpretations often appear unconvincing to the non-specialist. The qualitative nature of the interpretations is a significant factor in this quality assessment. Published reproductions of X-radiographs rarely clearly demonstrate the structural patterns observed and described. It is possible to describe quantitatively features in X-radiographs that are indicative of particular fashioning techniques. Unfortunately, this usually requires access to digital X-ray equipment. A method is described here for acquiring and calibrating digital images from X-radiographs exposed onto standard film. Often with ceramics, thickness and density information are confounded in X-radiographs. A low-pass filtering technique is used to remove the density information. The resulting image is then calibrated using Lambert's Law of X-ray absorbtion combined with some simple measurements to produce a sherd thickness map. The filtered density information is then similarly treated to drive a density distribution across the sherd. The use of the technique is illustrated on three specimens from an experiment in which the fashioning techniques were carefully controlled. Enhanced images are used to document features which distinguish the three fashioning techniques. Measurement of such features and quantitative interpretation of wall thickness of ceramics are highlighted as research areas which require further attention.
Url:
DOI: 10.1006/jasc.1996.0037
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Moran</name><affiliation wicri:level="1"><mods:affiliation>Commonwealth Scientific and Industrial Research Organization, Division of Soils, GPO Box 639, ACT 2601, Australia</mods:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>Commonwealth Scientific and Industrial Research Organization, Division of Soils, GPO Box 639, ACT 2601</wicri:regionArea></affiliation></author><author><name sortKey="Bresson, L M" sort="Bresson, L M" uniqKey="Bresson L" first="L.-M." last="Bresson">L.-M. Bresson</name><affiliation wicri:level="1"><mods:affiliation>Institut National Agronomique, Science du Sol et Hydrologie, Thiverval-Grignon 78850, France</mods:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Institut National Agronomique, Science du Sol et Hydrologie, Thiverval-Grignon 78850</wicri:regionArea></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:8CF6DF68BA8548A2D53F2C7692C9F08FCD62B0DE</idno><date when="1996" year="1996">1996</date><idno type="doi">10.1006/jasc.1996.0037</idno><idno type="url">https://api.istex.fr/document/8CF6DF68BA8548A2D53F2C7692C9F08FCD62B0DE/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">001A61</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">001A61</idno><idno type="wicri:Area/Istex/Curation">001A61</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Calibration and Visualization of Wall-Thickness and Porosity Distributions of Ceramics Using X-radiography and Image Processing</title><author><name sortKey="Pierret, A" sort="Pierret, A" uniqKey="Pierret A" first="A." last="Pierret">A. Pierret</name><affiliation wicri:level="1"><mods:affiliation>Institut National Agronomique, Science du Sol et Hydrologie, Thiverval-Grignon 78850, France</mods:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Institut National Agronomique, Science du Sol et Hydrologie, Thiverval-Grignon 78850</wicri:regionArea></affiliation></author><author><name sortKey="Moran, C J" sort="Moran, C J" uniqKey="Moran C" first="C. J." last="Moran">C. J. Moran</name><affiliation wicri:level="1"><mods:affiliation>Commonwealth Scientific and Industrial Research Organization, Division of Soils, GPO Box 639, ACT 2601, Australia</mods:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>Commonwealth Scientific and Industrial Research Organization, Division of Soils, GPO Box 639, ACT 2601</wicri:regionArea></affiliation></author><author><name sortKey="Bresson, L M" sort="Bresson, L M" uniqKey="Bresson L" first="L.-M." last="Bresson">L.-M. Bresson</name><affiliation wicri:level="1"><mods:affiliation>Institut National Agronomique, Science du Sol et Hydrologie, Thiverval-Grignon 78850, France</mods:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Institut National Agronomique, Science du Sol et Hydrologie, Thiverval-Grignon 78850</wicri:regionArea></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Archaeological Science</title><title level="j" type="abbrev">YJASC</title><idno type="ISSN">0305-4403</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1996">1996</date><biblScope unit="volume">23</biblScope><biblScope unit="issue">3</biblScope><biblScope unit="page" from="419">419</biblScope><biblScope unit="page" to="428">428</biblScope></imprint><idno type="ISSN">0305-4403</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0305-4403</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Academic press</term><term>Archaeological ceramics</term><term>Archaeological science</term><term>Carr</term><term>Carr riddick</term><term>Ceramic radiography</term><term>Ceramic technology</term><term>Ceramic wall properties</term><term>Courty roux</term><term>Density distribution</term><term>Density information</term><term>Digital images</term><term>Display convenience</term><term>Experimental material</term><term>Focal distance</term><term>Gravimetric</term><term>Gravimetric density</term><term>Grey level</term><term>Grey levels</term><term>Heterogeneity</term><term>Image processing</term><term>Incident intensity</term><term>Internal structure</term><term>Larger value</term><term>Leeuw</term><term>Local heterogeneities</term><term>Local variations</term><term>Ltered</term><term>Ltered image</term><term>Many dimensions</term><term>Mass absorption</term><term>Mathematical morphology</term><term>Mineral inclusions</term><term>Normal views</term><term>Perspective view</term><term>Pierret</term><term>Pixel</term><term>Pixel position</term><term>Pore</term><term>Pore space</term><term>Porosity</term><term>Porosity calibration</term><term>Porosity distribution</term><term>Porosity image</term><term>Porosity information</term><term>Porosity range</term><term>Preferred orientation</term><term>Radiography</term><term>Rencontres internationales</term><term>Roux</term><term>Same specimen</term><term>Sherd</term><term>Sherd orientation</term><term>Sherd thickness</term><term>Skilled potter</term><term>Small range</term><term>Smaller value</term><term>Soil science</term><term>Such features</term><term>Surface features</term><term>Temper particles</term><term>Terre cuite</term><term>Thickness image</term><term>Thickness images</term><term>Thickness information</term><term>Thickness variations</term><term>Upper parts</term><term>Vessel walls</term><term>Visual examination</term><term>Visualization</term><term>Wall thickness</term><term>Wall thickness variations</term><term>Wall-thickness</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>Academic press</term><term>Archaeological ceramics</term><term>Archaeological science</term><term>Carr</term><term>Carr riddick</term><term>Ceramic radiography</term><term>Ceramic wall properties</term><term>Courty roux</term><term>Density distribution</term><term>Density information</term><term>Digital images</term><term>Display convenience</term><term>Experimental material</term><term>Focal distance</term><term>Gravimetric</term><term>Gravimetric density</term><term>Grey level</term><term>Grey levels</term><term>Heterogeneity</term><term>Image processing</term><term>Incident intensity</term><term>Internal structure</term><term>Larger value</term><term>Leeuw</term><term>Local heterogeneities</term><term>Local variations</term><term>Ltered</term><term>Ltered image</term><term>Many dimensions</term><term>Mass absorption</term><term>Mathematical morphology</term><term>Mineral inclusions</term><term>Normal views</term><term>Perspective view</term><term>Pierret</term><term>Pixel</term><term>Pixel position</term><term>Pore</term><term>Pore space</term><term>Porosity</term><term>Porosity calibration</term><term>Porosity distribution</term><term>Porosity image</term><term>Porosity information</term><term>Porosity range</term><term>Preferred orientation</term><term>Rencontres internationales</term><term>Roux</term><term>Same specimen</term><term>Sherd</term><term>Sherd orientation</term><term>Sherd thickness</term><term>Skilled potter</term><term>Small range</term><term>Smaller value</term><term>Soil science</term><term>Such features</term><term>Surface features</term><term>Temper particles</term><term>Terre cuite</term><term>Thickness image</term><term>Thickness images</term><term>Thickness information</term><term>Thickness variations</term><term>Upper parts</term><term>Vessel walls</term><term>Visual examination</term><term>Visualization</term><term>Wall thickness</term><term>Wall thickness variations</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Science des sols</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Abstract: It has been reported that X-radiography studies of archaeological ceramics can be used to identify fashioning processes. However, diagnostic criteria used for such interpretations often appear unconvincing to the non-specialist. The qualitative nature of the interpretations is a significant factor in this quality assessment. Published reproductions of X-radiographs rarely clearly demonstrate the structural patterns observed and described. It is possible to describe quantitatively features in X-radiographs that are indicative of particular fashioning techniques. Unfortunately, this usually requires access to digital X-ray equipment. A method is described here for acquiring and calibrating digital images from X-radiographs exposed onto standard film. Often with ceramics, thickness and density information are confounded in X-radiographs. A low-pass filtering technique is used to remove the density information. The resulting image is then calibrated using Lambert's Law of X-ray absorbtion combined with some simple measurements to produce a sherd thickness map. The filtered density information is then similarly treated to drive a density distribution across the sherd. The use of the technique is illustrated on three specimens from an experiment in which the fashioning techniques were carefully controlled. Enhanced images are used to document features which distinguish the three fashioning techniques. Measurement of such features and quantitative interpretation of wall thickness of ceramics are highlighted as research areas which require further attention.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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