Design of DSP Digital Watermarking System Based on DWT-SVD Algorithm
Yu Xin, Yang Hong-mei, Qingqing Zhang · International Conference on Electronics, Communications and Control · 2012
In view of DWT and SVD theory, this paper puts forward an image watermarking algorithm which can resist geometrical attacks and it makes use of the stability of singular value, combined with wavelet transformation theory. This algorithm embeds the watermark information into the brightness space of the carrier image's CIEL*a*b* color model and it does some attack process to the carrier image and prints it out. Then this system captures the watermarked image real-time by use of the TMS320DM642 hardware platform and then does watermark detection and extraction. Last, it evaluates quality of the collected image with watermarked and the extracted watermark image by use of the powerful process ability of Matlab. Experimental results show that, this watermarking algorithm has excellent robustness to resist geometric attacks, and this system completes the realization of this algorithm in DSP hardware platform. This will greatly accelerate the research of digital watermarking technology theory and the development of application and extension.