Wavelet Packet and Hybrid Filter Based Digital Watermarking
International Journal of Multimedia and Ubiquitous Engineering
In this paper, a new watermark algorithm that based on wavelet packet transform and hybrid filter is proposed for watermark of digital images, which include many high frequency components. The proposed watermark algorithm is used in the high frequency component of image and applies watermark to the overall subband that include the lowest frequency band. And the watermark is embedded on input image and hybrid filtering concept has been adopted to remove the noise that was added to the original
... d to the original image in watermark embedding stage. The quality of the watermarked image has been analyzed with PSNR. From the simulation results, the proposed algorithm shows better invisibility and robustness performance compare with conventional watermark methods. Especially, it demonstrates better robustness for high image compression in the remote sensing images application. This paper is organized as follows; In Section 2, a new algorithm for creating, embedding and detecting watermark is explained. The improvements of the proposed algorithm over the conventional algorithm are demonstrated by the experiment result in Section 3. Finally Section 4, the results are summarized, some technical issues are discussed, and some suggestions and further studies are discussed.