Based On Wavelet Domain Sigular Value Digital Watermarking Algorithm

Digital watermarking is a technology which embed some identify information (digitalwatermark) into digital media(including multimedia, documents, software,etc.), which without prejudice to the original carrier of value,not easy to be the perceptual systems (such as visual or hearing system) aware or notice.Through the information hidden in the carrier to achieve information hiding,storing,copyright protection.In this paper, do a more in-depth analysis and research on digital watermarking technology and its application ,this paper describes several aspects of digital watermarking。First,introduce the development ,present and future vision of digital watermarking technology,and summarize digital watermarking embedding and detection technology and the existing image watermarking algorithm .Introduced several attack methods of digital images, through attacks on the watermark algorithm to detect the watermark robustness.Summarize the basic concepts relate with watermarking technology ,wavelet transform theory,singular value changes.Research on the wavelet domain algorithm, Through the wavelet decomposition of the frequency sub-images in the low-frequency sub-images LL embedded watermark, effectively reduce the calculation amountpropoded an method embedded singular value of digital watermarking algorithm based on wavelet-domain,the algorithm,selected 256-color bitmap as a watermark image,the singular value of the watermark treater by re-embedding to the source image,in the detection algorithms need the initialization date in order to achieve non-blind extraction.Analysis of the simulation results, the application of objective proof of the image peak signal to noise ratio performance of the algorithm, by attacking the watermarked image and then extract the watermark to assess the robustness of algorithm.