Title :
Robust watermarking of still images for copyright protection
Author :
Barni, Ad ; Bartolini, F. ; Cappellini, V. ; Piva, A.
Author_Institution :
Dipt. di Ingegneria Elettronica, Firenze Univ., Italy
Abstract :
Digital watermarking has been proposed as a means to protect the copyright of multimedia data in a networked environment, since it makes it possible to tightly embed a code into a digital document allowing the identification of the data owner. A new watermarking system for digital images is presented: the method embeds a sequence of random real numbers in a selected set of DCT coefficients. Embedding is performed by exploiting the masking characteristics of the human visual system, to ensure the watermark invisibility. The embedded sequence can be extracted without resorting to the original uncorrupted image. Experimental results demonstrate that the watermark is robust to several signal processing techniques and geometric distortions
Keywords :
copyright; discrete cosine transforms; image coding; transform coding; visual perception; DCT coefficients; copyright protection; data owner identification; digital document coding; digital images; digital watermarking; experimental results; geometric distortions; human visual system; masking characteristics; multimedia data; networked environment; random real number sequence; robust watermarking; signal processing techniques; still images; watermark invisibility; watermarking system; Copyright protection; Data mining; Digital images; Discrete cosine transforms; Distortion; Humans; Robustness; Signal processing; Visual system; Watermarking;
Conference_Titel :
Digital Signal Processing Proceedings, 1997. DSP 97., 1997 13th International Conference on
Conference_Location :
Santorini
Print_ISBN :
0-7803-4137-6
DOI :
10.1109/ICDSP.1997.628384
