Authors: Roumen Kountchev, Vladimir Todorov, Roumiana Kountcheva
Addresses: Department of Radio Communications and Video Technologies, Technical University of Sofia, bul Kl. Ohridski 8, Sofia 1000, Bulgaria. ' T&K Engineering Co., Mladost 3, POB 12, Sofia 1712, Bulgaria. ' T&K Engineering Co., Mladost 3, POB 12, Sofia 1712, Bulgaria
Abstract: A new approach for efficient archiving and content protection of scanned documents, comprising texts and pictures, is presented in this paper. The offered approach presumes to compress the pictures and the texts in different way: the pictures – with lossy coding based on decomposition, called inverse difference pyramid (IDP), and the parts, containing text (graphics) – with lossless coding. For the reliable image content protection is offered new method for digital watermarking based on the IDP decomposition, which permits the insertion of multi-layer watermarks.
Keywords: multi-layer image decomposition; lossless coding; lossy compression; digital watermarking; fragile watermarks; image contents; content protection; document archiving; scanned documents; inverse difference pyramid; text; graphics; security.
International Journal of Reasoning-based Intelligent Systems, 2009 Vol.1 No.1/2, pp.43 - 55
Published online: 24 Jun 2009 *Full-text access for editors Access for subscribers Purchase this article Comment on this article