Posts Tagged spectral imaging
Gregory Bearman, Mark S. Anderson & Kenneth Aitchison. 2011. New Imaging Methods to Improve Text Legibility of Ostraca – PalArch’s Journal of Archaeology of Egypt/Egyptology, 8(2) (2011)
Posted by PalArch Editor (AV) in PalArch's Journal of Archaeology of Egypt / Egyptology on June 18th, 2011
Abstract We report on experiments on three new methods to improve text contrast for carbon ink ostraca. These are (1) Raman imaging, (2) Micro-focus XRF scanning and (3) exogenous contrast agents either to enhance the X-ray signal or create an optical fluorescence signal. We tested all three methods with modern ‘stunt’ ostraca, made using a variety of carbon-based inks. In each imaging modality, the inks are clearly differentiated from the clay background. The exogenous contrast enhancement, in particular, suggests a variety of approaches to improving text legibility.
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Gregory Bearman & William A. Christens-Barry. 2009. Spectral Imaging of Ostraca. – PalArch’s Journal of Archaeology of Egypt/Egyptology, 6(7) (2009)
Posted by PalArch Editor (AV) in PalArch's Journal of Archaeology of Egypt / Egyptology on February 10th, 2010
Abstract By analogy with ancient texts, infrared imaging of ostraca has long been employed to help improve readings. We report on extensive spectral imaging of ostraca over the visible and near infrared. Spectral imaging acquires the complete spectrum for each pixel in an image; the data can be used with an extensive set of software tools that were developed originally for satellite and scientific imaging. In this case, the spectral data helps explain why infrared imaging works to improve text legibility (and why not in some cases). A better understanding of the underlying imaging mechanism points the way for inexpensive methods for taking data either in the fi eld or at museums.
Author’s request: with revised email address and acknowledgement.
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Gregory Bearman & William A. Christens-Barry. 2009. Spectral Imaging of Ostraca. – PalArch’s Journal of Archaeology of Egypt/Egyptology, 6(7) (2009)
Posted by PalArch Editor (IN) in PalArch's Journal of Archaeology of Egypt / Egyptology on December 1st, 2009
Abstract By analogy with ancient texts, infrared imaging of ostraca has long been employed to help improve readings. We report on extensive spectral imaging of ostraca over the visible and near infrared. Spectral imaging acquires the complete spectrum for each pixel in an image; the data can be used with an extensive set of software tools that were developed originally for satellite and scientific imaging. In this case, the spectral data helps explain why infrared imaging works to improve text legibility (and why not in some cases). A better understanding of the underlying imaging mechanism points the way for inexpensive methods for taking data either in the fi eld or at museums.
Download PDF file
