Title :
Multiresolution watermarking for images and video: a unified approach
Author :
Zhu, Wenwu ; Xiong, Zixiang ; Zhang, Ya-Qin
Author_Institution :
AT&T Bell Labs., Holmdel, NJ, USA
Abstract :
This paper proposes a unified approach to digital watermarking of images and video based on the 2D and 3D discrete wavelet transforms. The hierarchical nature of the wavelet representation allows multiresolutional detection of the digital watermark, which is a Gaussian distributed random vector added to all the high pass bands in the wavelet domain. We show that, when subjected to distortion from compression or image halftoning, the corresponding watermark can still be correctly identified at each resolution (excluding the lowest one) in the wavelet domain. Computational saving from such a multiresolution watermarking framework is obvious, especially for the video case
Keywords :
Gaussian distribution; cryptography; data compression; discrete wavelet transforms; image coding; image representation; image resolution; transform coding; video coding; 2D discrete wavelet transforms; 3D discrete wavelet transforms; Gaussian distributed random vector; compression; digital watermarking; distortion; high pass bands; image halftoning; images; multiresolution watermarking; multiresolution watermarking framework; multiresolutional detection; resolution; unified approach; video; wavelet domain; wavelet representation; Copyright protection; Discrete cosine transforms; Discrete wavelet transforms; Image coding; Image resolution; Robustness; Video compression; Watermarking; Wavelet coefficients; Wavelet domain;
Conference_Titel :
Image Processing, 1998. ICIP 98. Proceedings. 1998 International Conference on
Conference_Location :
Chicago, IL
Print_ISBN :
0-8186-8821-1
DOI :
10.1109/ICIP.1998.723530