Conference paper

Bianco,Bruno ,Salerno E.,Tonazzini A., Zitová B., Šroubek F.

EUROMED 2010, 3rd International Conference dedicated on Digital Heritage

ARCHAEOLINGUA

Budapest

2010

978-963-9911-16-1

Ing. Filip Šroubek, Ph.D. (ÚTIA - Oddělení zpracování obrazové informace)

document analysis, deblurring, image registration, multispec

In this paper we will present a methodology to preliminarily register multispectral images od ancient documents in order to correct geometrical misalignments, and apply deblurring techniques to improve image quality for further document analysis, where sharper images are needed. Deblurring is performed with a multichannel approach, adapted to the case of multispectral acquisition. Statistical techniques of decorrelation are applied to improve the legibility of documents or to restore degraded features, extract individual context parts of the document, separate patterns as the main text from the background, or attenuate interferences due to the seeping of ink from verso-to-recto.