Research Of Digital Watermarking Algorithm Based On The Mix Of Time-domain

Computer networks and multimedia digital works have obtained fast development this era. Unlimited uploading, downloading, copying, and illegal tampering of digital works have become argent problems to be solved in the process of transmission. The digital watermarking arises at this moment. Digital watermarking is a branch of hiding technology, which is to add meaningful and recognizable information to digital works, and try to have a certain resistance to damage. It has played a very effective role in the protection of information security and copyright, and is causing the extensive concern of the business and academia.In this paper, a new algorithm of digital watermarking is obtained conforming to the trend. Based on a lot of academic materials, the model, algorithm and evaluation of basic theoretical knowledge is introduced, which provide an important theoretical basis for the algorithm to be put forward, realized, and analysis. On this basis, a new digital watermarking algorithm based on the mix of time-domain is proposed, and the realization of the two transformation fields is completed. For DCT domain, the watermark is embedded into the DCT domain spectrum to obtain the watermark embedding and extraction results. Then, the results are evaluated, analyzed, and compared with the results of traditional DCT digital watermark. In DWT domain, the wavelet transform based on singular value decomposition is used in this paper. Firstly, the mix of time-domain on the original image is completed, and then two levels of wavelet decomposition is completed on it. After the singular value decomposition on low frequency coefficient is gotten, singular value is modified according to the watermark data to complete the watermark embedding. SVD has good robustness for a variety of attacks, due to its stable nature.In this paper, the mix of time-domain technology is to process the time domain information of the carrier image. Well, the watermark scrambling algorithm is in view of the watermark image preprocessing, aimed at improving the confidentiality of meaningful watermark. Therefore, the scrambling algorithm is added to the mix of time-domain technology, and the results are compared with the results of the mix of time-domain in order to obtain the performance evaluation.After a large number of experiments, the results show that the concealment and robustness of the digital watermarking technology based on the mix of time-domain are good. Otherwise, the watermarking algorithm proposed in this paper is a kind of blind detection algorithm, which has more advantageous to blind detection.