Digital Watermarking Algorithm based on Singular Value Decomposition and Arnold Transform

basically the Watermarking process is use for hiding secret information for labeling digital picture. This paper presents a method of watermark embedding and extracting which is based on SVD (singular value decomposition) and Arnold Transform. The SVD is a linear algebra technique used for diagonalizable matrices and it transfer of convert most of the signal energy into very few singular values. The embedded position is selected according to the secret key which is obtained during the course of the scrambling degree calculation in Arnold transform. The experimental results showed that the Arnold transformation helpful in digital watermarking process. A group of experiments are used for test the effectiveness of the proposed algorithm, and experimental results show that the scheme is effectiveness and robust against different image processing operation. The experimental results show that the proposed method has high PSNR and NC results under general image processing. Keywords— Watermaking , Singular Value Decomposition ,Arnold Transform ,PSNR ,NC.