Title :
Frequency domain chaotic watermarking
Author :
Giovanardi, A. ; Mazzini, G.
Abstract :
A watermarking procedure to be applied in the frequency domain to digital images has been proposed and investigated, with purpose of copyright protection. The selected digital signature is a chaotic sequence embedded by considering a shaping function to weight in different manner each sequence value, as a function of the image properties in the frequency domain. The shaping function proposed permits one to enhance the robustness of the watermarking to attacks like the JPEG one. Numerical results show the validity of the proposed approach and of the use of particular classes of chaotic maps
Keywords :
chaos; copy protection; image coding; message authentication; sequences; chaotic maps; copyright protection; digital images; digital signature; embedded chaotic sequence; frequency domain chaotic watermarking; shaping function; Chaos; Digital images; Discrete Fourier transforms; Fourier transforms; Frequency domain analysis; Image coding; Protection; Robustness; Transform coding; Watermarking;
Conference_Titel :
Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6685-9
DOI :
10.1109/ISCAS.2001.921122
