High dynamic range (HDR) images of radiographies: modern digital replacement of negatoscopes?

Luís Bravo Pereira

doi:10.34618/ecr.1.3172

High dynamic range (HDR) images of radiographies: modern digital replacement of negatoscopes?

Luís Bravo Pereira

Resultado de pesquisa › revisão de pares

2 Transferências (Pure)

Resumo

Neste artigo apresentamos uma aproximação promissora à digitalização de imagem radiográfica em filme, através da utilização de máquinas fotográficas comuns enquanto mecanismos que permitem a digitalização com diferentes níveis de exposição (permitindo, em alguns casos, ler informação a partir das áreas mais escuras e densas da imagem) e combinando estas imagens com novas técnicas de High Dynamic Range (HDR), aumentando desta forma a latitude de exposição do resultado final. Esta nova abordagem é actualmente possível devido às mais recentes gerações de software para tratamento de imagem que presentemente utilizamos. Como exemplos de software que possuem esta ferramenta podemos apontar o líder de mercado Adobe Photoshop (que apresenta esta capacidade em HDR desde a versão CS2) ou o mais especializado em termos de HDR, Photomatix, entre outros. As imagens finais apresentam em alguns casos resultados mais interessantes do que a simples digitalização de imagem, com ou sem processamento posterior e pode, em alguns casos, ser uma boa alternativa ao uso de negatoscópios no exame de radiografias.

Idioma original	English
Páginas (de-até)	140-152
Número de páginas	13
Revista	Estudos de Conservação e Restauro
Número de emissão	1
DOIs	https://doi.org/10.34618/ecr.1.3172
Estado da publicação	Publicado - 1 jan. 2009

Keywords

Radiografia
HDR
Negatoscópios
Photoshop
Photomatix

Acesso ao documento

10.34618/ecr.1.3172Licença:

118858547Final published version, 1,15 MBLicença:

http://hdl.handle.net/10400.14/53423Licença:

Citação

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title = "High dynamic range (HDR) images of radiographies: modern digital replacement of negatoscopes?",

abstract = "With this paper we are presenting a new promising approach to digitalization of radiographic image in film, using common photographic cameras as device to digitalize with different levels of exposure (allowing, in some cases, to read information from the darker/denser areas of the image) and combining those images with the new technique of High Dynamic Range (HDR) imaging, increasing this way the exposure latitude of the final image. This new approach is possible today because the most recent generations of image treatment software present this new feature. Examples of software presenting this tool are the market leader Adobe Photoshop (presenting this HDR capacity since CS2 version) or the most HDR specialized Photomatix, among others. The resulting images seem to show in somecases more interesting results than the single pass digitalization of images, with or without post-processing improvement, and can in some cases be a good alternative to the use of negatoscopes on the exam of radiographies.",

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N2 - With this paper we are presenting a new promising approach to digitalization of radiographic image in film, using common photographic cameras as device to digitalize with different levels of exposure (allowing, in some cases, to read information from the darker/denser areas of the image) and combining those images with the new technique of High Dynamic Range (HDR) imaging, increasing this way the exposure latitude of the final image. This new approach is possible today because the most recent generations of image treatment software present this new feature. Examples of software presenting this tool are the market leader Adobe Photoshop (presenting this HDR capacity since CS2 version) or the most HDR specialized Photomatix, among others. The resulting images seem to show in somecases more interesting results than the single pass digitalization of images, with or without post-processing improvement, and can in some cases be a good alternative to the use of negatoscopes on the exam of radiographies.

AB - With this paper we are presenting a new promising approach to digitalization of radiographic image in film, using common photographic cameras as device to digitalize with different levels of exposure (allowing, in some cases, to read information from the darker/denser areas of the image) and combining those images with the new technique of High Dynamic Range (HDR) imaging, increasing this way the exposure latitude of the final image. This new approach is possible today because the most recent generations of image treatment software present this new feature. Examples of software presenting this tool are the market leader Adobe Photoshop (presenting this HDR capacity since CS2 version) or the most HDR specialized Photomatix, among others. The resulting images seem to show in somecases more interesting results than the single pass digitalization of images, with or without post-processing improvement, and can in some cases be a good alternative to the use of negatoscopes on the exam of radiographies.

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High dynamic range (HDR) images of radiographies: modern digital replacement of negatoscopes?

Resumo

Keywords

Acesso ao documento

Impressão digital

Citação