Authors:
Maria Chroni
;
Angelos Fylakis
and
Stavros D. Nikolopoulos
Affiliation:
University of Ioannina, Greece
Keyword(s):
Watermarking Techniques, Image Watermarking Systems, Intellectual Property Rights, Color Images, Self-inverting Permutations, 2D-representations of Permutations, Encoding, Decoding, Algorithms.
Related
Ontology
Subjects/Areas/Topics:
Accessibility Issues and Technology
;
Multimedia and User Interfaces
;
Web Information Systems and Technologies
;
Web Interfaces and Applications
Abstract:
In this work we propose an efficient and easily implemented codec system, which we named WaterIMAGE,
for watermarking images that are intended for uploading on the web and making them public online. An
important fact of our system is that it suggests a way in which an integer number can be represented in a two
dimensional grid and, thus, since images are two dimensional objects that representation can be efficiently
marked on them. In particular, our system uses an efficient technique which is based on a 2D representation of
self-inverting permutations and mainly consists of two components: the first component contains an encoding
algorithm which encodes an integer w into a self-inverting permutation p∗ and a decoding algorithm which
extracts the integer w from p∗, while the second component contains codec algorithms which are responsible
for embedding a watermark into an image I, resulting the image Iw, and extract it from Iw. Our system
incorporates important properties which allow
us to successfully extract the watermark w from the image Iw
even if the input image has been compressed with a lossy method and/or rotated. All the system’s algorithms
have been developed and tested in JAVA programming environment.
(More)