Title :
Copyright protection of images using human visual masking on DCT-based watermarking
Author :
Rangsanseri, Y. ; Thitimajshima, W.
Author_Institution :
Dept. of Telecommun. Eng., King Mongkut´´s Inst. of Technol., Bangkok, Thailand
Abstract :
In this paper a new watermarking algorithm for digital images operating in the frequency domain is presented: a sequence of pseudo-random real numbers is embedded in a selected set of DCT coefficients. After embedding, the watermark is adapted to the image to be signed by exploiting the masking characteristics of the Human Visual System (HVS) in order to achieve watermark invisibility without diminishing its robustness. Experimental results demonstrate that the watermark is robust to several signal processing techniques and geometric distortions.
Keywords :
copyright; discrete cosine transforms; image coding; message authentication; random sequences; watermarking; DCT coefficients; DCT-based watermarking; copyright protection; digital images; frequency domain operation; human visual masking; human visual system; masking characteristics; pseudo-random real number sequence; watermark detection; watermark invisibility; watermark robustness; watermarking algorithm; Copyright protection; Digital images; Discrete cosine transforms; Frequency domain analysis; Humans; Robustness; Signal processing; Signal processing algorithms; Visual system; Watermarking;
Conference_Titel :
Circuits and Systems, 2002. APCCAS '02. 2002 Asia-Pacific Conference on
Print_ISBN :
0-7803-7690-0
DOI :
10.1109/APCCAS.2002.1114985
