New method of semi-automatic modal analyses for phenocrysts of porphyritic rocks based on quantitative digital colour specification technique
Autor(a) principal: | |
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Data de Publicação: | 2007 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | REM. Revista Escola de Minas (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672007000100003 |
Resumo: | This paper proposes a new method for modal analyses of centimetric phenocrysts and porphyroblasts using a digital rock image. The dot matrix image of the rock is imported into vectorial draw software as background. The outline of all of the phenocrysts is marked on the overlay by closed vectorial curves and their internal area is painted in black. After this operation, the rock image on the background is deleted and the background is painted in white. The vectorial objects composed of the background and the overlay are exported as a matrix image of BMP format. The percentage of the areas painted in black corresponds to modal abundance of the phenocrysts, and it is calculated by the Wilber colour specification software. This method has high precision in graphic processing. However the translucency of the groundmass causes uncertainness in vectorial phenocryst marking. Therefore, it is recommended for rocks with phenocrysts larger than 5 mm. |
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New method of semi-automatic modal analyses for phenocrysts of porphyritic rocks based on quantitative digital colour specification techniqueModal analysesdigital imagephenocrystporphyroblastWilburcolour specificationThis paper proposes a new method for modal analyses of centimetric phenocrysts and porphyroblasts using a digital rock image. The dot matrix image of the rock is imported into vectorial draw software as background. The outline of all of the phenocrysts is marked on the overlay by closed vectorial curves and their internal area is painted in black. After this operation, the rock image on the background is deleted and the background is painted in white. The vectorial objects composed of the background and the overlay are exported as a matrix image of BMP format. The percentage of the areas painted in black corresponds to modal abundance of the phenocrysts, and it is calculated by the Wilber colour specification software. This method has high precision in graphic processing. However the translucency of the groundmass causes uncertainness in vectorial phenocryst marking. Therefore, it is recommended for rocks with phenocrysts larger than 5 mm.Escola de Minas2007-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672007000100003Rem: Revista Escola de Minas v.60 n.1 2007reponame:REM. Revista Escola de Minas (Online)instname:Escola de Minasinstacron:ESCOLA DE MINAS10.1590/S0370-44672007000100003info:eu-repo/semantics/openAccessMotoki,AkihisaPetrakis,Giannis HansSoares,RodrigoSichel,Susanna EleonoraAires,José Ribeiroeng2007-05-22T00:00:00Zoai:scielo:S0370-44672007000100003Revistahttp://www.scielo.br/remhttps://old.scielo.br/oai/scielo-oai.phpeditor@rem.com.br1807-03530370-4467opendoar:2007-05-22T00:00REM. Revista Escola de Minas (Online) - Escola de Minasfalse |
dc.title.none.fl_str_mv |
New method of semi-automatic modal analyses for phenocrysts of porphyritic rocks based on quantitative digital colour specification technique |
title |
New method of semi-automatic modal analyses for phenocrysts of porphyritic rocks based on quantitative digital colour specification technique |
spellingShingle |
New method of semi-automatic modal analyses for phenocrysts of porphyritic rocks based on quantitative digital colour specification technique Motoki,Akihisa Modal analyses digital image phenocryst porphyroblast Wilbur colour specification |
title_short |
New method of semi-automatic modal analyses for phenocrysts of porphyritic rocks based on quantitative digital colour specification technique |
title_full |
New method of semi-automatic modal analyses for phenocrysts of porphyritic rocks based on quantitative digital colour specification technique |
title_fullStr |
New method of semi-automatic modal analyses for phenocrysts of porphyritic rocks based on quantitative digital colour specification technique |
title_full_unstemmed |
New method of semi-automatic modal analyses for phenocrysts of porphyritic rocks based on quantitative digital colour specification technique |
title_sort |
New method of semi-automatic modal analyses for phenocrysts of porphyritic rocks based on quantitative digital colour specification technique |
author |
Motoki,Akihisa |
author_facet |
Motoki,Akihisa Petrakis,Giannis Hans Soares,Rodrigo Sichel,Susanna Eleonora Aires,José Ribeiro |
author_role |
author |
author2 |
Petrakis,Giannis Hans Soares,Rodrigo Sichel,Susanna Eleonora Aires,José Ribeiro |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Motoki,Akihisa Petrakis,Giannis Hans Soares,Rodrigo Sichel,Susanna Eleonora Aires,José Ribeiro |
dc.subject.por.fl_str_mv |
Modal analyses digital image phenocryst porphyroblast Wilbur colour specification |
topic |
Modal analyses digital image phenocryst porphyroblast Wilbur colour specification |
description |
This paper proposes a new method for modal analyses of centimetric phenocrysts and porphyroblasts using a digital rock image. The dot matrix image of the rock is imported into vectorial draw software as background. The outline of all of the phenocrysts is marked on the overlay by closed vectorial curves and their internal area is painted in black. After this operation, the rock image on the background is deleted and the background is painted in white. The vectorial objects composed of the background and the overlay are exported as a matrix image of BMP format. The percentage of the areas painted in black corresponds to modal abundance of the phenocrysts, and it is calculated by the Wilber colour specification software. This method has high precision in graphic processing. However the translucency of the groundmass causes uncertainness in vectorial phenocryst marking. Therefore, it is recommended for rocks with phenocrysts larger than 5 mm. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007-03-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672007000100003 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0370-44672007000100003 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0370-44672007000100003 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Escola de Minas |
publisher.none.fl_str_mv |
Escola de Minas |
dc.source.none.fl_str_mv |
Rem: Revista Escola de Minas v.60 n.1 2007 reponame:REM. Revista Escola de Minas (Online) instname:Escola de Minas instacron:ESCOLA DE MINAS |
instname_str |
Escola de Minas |
instacron_str |
ESCOLA DE MINAS |
institution |
ESCOLA DE MINAS |
reponame_str |
REM. Revista Escola de Minas (Online) |
collection |
REM. Revista Escola de Minas (Online) |
repository.name.fl_str_mv |
REM. Revista Escola de Minas (Online) - Escola de Minas |
repository.mail.fl_str_mv |
editor@rem.com.br |
_version_ |
1754122196723171328 |