title: Real-time registration of paper watermarks
creator: Whelan, Paul F.
creator: Soille, Pierre
creator: Drimbarean, Alexandru
subject: computer vision; image analysis; Machine vision; Defect detection; Watermarks
description: The aim of this article is to outline the issues involved in the application of machine vision to the automatic extraction and registration of watermarks from continuous web paper. The correct identification and localisation of watermarks are key issues in paper manufacturing. As well as requiring the position of the watermark for defect detection and classification, it is necessary to insure its position on the paper prior to the cutting process. Two paper types are discussed, with and without laid and chain lines(these lines appear as a complex periodic background to the watermark and further complicate the segmentation process). We will examine both morphological and Fourier approaches to the watermark segmentation process, concentrating specifically on those images with complex backgrounds. Finally we detail a system design suitable for real-time implementation.
publisher: Elsevier
date: 2001
type: Article
type: PeerReviewed
format: application/pdf
language: en
relation: http://doras.dcu.ie/18821/1/whelan_2001_143.pdf
relation: http://dx.doi.org/10.1006/rtim.2000.0239
identifier: http://doras.dcu.ie/18821/
source: Whelan, Paul F. and Soille, Pierre and Drimbarean, Alexandru (2001) Real-time registration of paper watermarks. Real-Time Imaging, 7 (4). pp. 367-380. ISSN 1077-2014
rights: © 2001 Elsevier
rights: This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License.