Digital Image Watermarking Algorithm Using the Intermediate Frequency
Abstract: Digital image
watermarking is one of the proposed solutions for copyright protection of
multimedia data. This technique is better than Digital Signatures and other
methods because it does not increase overhead. Watermarking adds the additional
requirement of robustness. To improve the robustness of digital image
watermarking method based on the image frequency, this paper adopts the
intermediate frequency to embed the watermarking and proposes an digital image
watermarking algorithm based on robust principal component analysis (RPCA) and
discrete cosine transform (DCT). Firstly, the high frequency part and the low
frequency part of the image are extracted by the RPCA algorithm. Because the high
frequency part has complex statistical characteristics, this paper processes
the high frequency part with "8×8" DCT method to obtain intermediate
frequency coefficients and then the watermarking information is embedded into
the obtained intermediate frequency coefficients. The experimental results show
that the proposed algorithm leads to satisfactory robustness to the attacks of
impulse noise and cropping.
Keywords: digital
watermarking, robust principal component analysis, discrete cosine transform, intermediate
frequency part
Author: Hong-an Li, Zhanli Li,
Zhuoming Du, Qi Wang
Journal Code: jptkomputergg160132
