A Proposed Digital Image Watermarking Based on DWT-DCT-SVD

With the rapid development of digital information age, digital watermarking technology is gradually becoming a useful way to protect the copyright of multimedia vendors. Robustness and imperceptibility of watermarked image are two important properties of Digital Watermarking. So they must be taken into consideration. In this paper, a watermarking algorithm of color image is proposed based on Discrete Wavelet Transform, Discrete Cosine Transform and Singular Value Decomposition (DWT-DCT-SVD). First convert host color image from RGB color space to YUV color space. Then a layer of discrete wavelet transform is applied to the luminance component Y, and divided the low frequency and into blocks by using discrete cosine transform, and conducted SVD with every block. Finally embed watermark to the cover image. The experimental results show that the algorithm is good invisibility and strong robust, and can effectively resist common watermark attacks.