Title :
Shadow watermark embedding system
Author :
Wang, Feng-Hsing ; Pan, Jeng-Shyang ; Jain, Lakhmi C.
Author_Institution :
Sch. of Electr. & Inf. Eng., South Australia Univ., The Levels, SA, Australia
Abstract :
A new watermarking approach based on discrete cosine transform (DCT) for digital images is proposed. A reference image is established from the cover image using the user-key. Then, a shadow watermark is created from this reference image and the original watermark. The proposed scheme embeds this shadow watermark into the cover image in the DCT domain to secure the secret content of the original watermark. To reveal the real watermark, the correct keys are required.
Keywords :
discrete cosine transforms; image coding; security of data; transform coding; watermarking; DCT domain; cover image; digital images; discrete cosine transform; reference image; shadow watermark embedding system; user-key; Discrete cosine transforms; Discrete wavelet transforms; Image coding; Image generation; Intelligent systems; Internet; Knowledge engineering; Quantization; Systems engineering and theory; Watermarking;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1465750
