Title :
Watermark recovery with a DCT based scheme employing nonuniform imbedding
Author :
Retsas, Ioannis ; Pieper, Ron ; Cristi, Roberto
Author_Institution :
Dept. of Electr. & Comput. Eng., Naval Postgraduate Sch., Monterey, CA, USA
Abstract :
Digital Watermarking is a highly evolving field, which involves the embedding of a digital signature under a multimedia object (image, video, audio) for the purpose of copyright protection In our paper we propose a method of embedding watermarks in still digital images in the DCT domain. A unique approach of rating the 8×8 blocks of the image DCT coefficients is proposed. The experimental results show sufficient robustness of the proposed scheme to common attacks such as cropping, and JPEG lossy compression.
Keywords :
block codes; copy protection; discrete cosine transforms; image coding; quantisation (signal); DCT based scheme; DCT domain; JPEG lossy compression robustness; copyright protection; cropping robustness; digital signature; digital watermarking; image DCT coefficients; multimedia object; multimedia security; nonuniform imbedding; still digital images; watermark recovery; Copyright protection; Digital images; Digital signatures; Discrete cosine transforms; Frequency; Image coding; Robustness; Transform coding; Video compression; Watermarking;
Conference_Titel :
System Theory, 2002. Proceedings of the Thirty-Fourth Southeastern Symposium on
Print_ISBN :
0-7803-7339-1
DOI :
10.1109/SSST.2002.1027025
