Terahertz Identification of Characters Written in Iron-Gall Ink on Stacked Paper

Haolian Shi, Leor Jacobi, Alexandre Locquet, D. S. Citrin

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Iron-gall ink has been widely used ink in the production of documents and artworks since the fifth century C.E. Terahertz imaging is used to read characters written in such ink on stacked sheets of paper. Several contrast mechanisms including maximum/minimum of the reflected terahertz signal, signature frequency, Gaussian mixture model, and short-time Fourier transform are tested to compare the image quality of the buried text. The results show that the short-time Fourier transform mechanism outperforms other contrast mechanism and has the ability to extract clear images of buried text within paper stacks.

Original languageEnglish
Title of host publicationIMEKO TC4 International Conference on Metrology for Archaeology and Cultural Heritage 2023
PublisherInternational Measurement Confederation (IMEKO)
Pages564-569
Number of pages6
ISBN (Electronic)9781713888345
StatePublished - 2023
Event2023 IMEKO TC4 International Conference on Metrology for Archaeology and Cultural Heritage - Rome, Italy
Duration: 19 Oct 202321 Oct 2023

Publication series

NameIMEKO TC4 International Conference on Metrology for Archaeology and Cultural Heritage 2023

Conference

Conference2023 IMEKO TC4 International Conference on Metrology for Archaeology and Cultural Heritage
Country/TerritoryItaly
CityRome
Period19/10/2321/10/23

Bibliographical note

Publisher Copyright:
© 2023 IMEKO TC TC4. All rights reserved.

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