A method of processing color image watermarking based on the Haar wavelet

Abstract

Despite the fact that traditional digital watermarking technology is relatively mature, there are still some areas that have not been fully involved in. For example, image watermarking technology and the certification are still in its infancy at early times. The bottleneck problem of digital product safety protection all solved theoretically with the combination of computing theory as well as traditional digital watermarking technology and point out a new direction for the research of information security industry. Inspired by the traditional algorithm of image watermarking and based on the Haar wavelet function along with algorithm of 2-D discrete wavelet transform and selection, this article presents the techniques of watermark embedding and extraction of color images. The main appraisal criteria of the watermark include invisibility and robustness, and some other standards. Image watermarking is relatively simple in the spatial domain, where it cannot resist geometrical attacks. In the transform domain, this approach can resist both geometrical attacks and image processing attacks. Only when the carrier image suffers from severe damage with the image quality hugely compromised will the extracted watermark become unrecognizable. As a result, the algorithm presented in this article can well embed the color image in the carrier image, and has good resistance to attack operations such as loss compression and adding of noise.