A comprehensive approach for watermarking is introduced in paper, and a hybrid digital watermarking scheme based on Discrete Wavelet Transform (DWT), Discrete Cosine Transform (DCT) and Principal Component Analysis (PCA). There are some watermarking technique presented, but there is disadvantage in the watermarking to withstand attacks, hence the new digital image watermarking algorithm is proposed which provide robust watermarking with minimal amount of distortion in case of attacks. Different properties of each algorithm are hybrid to develop new algorithm and produce a robust algorithm. Peak signal ratio is used to measure invisibility whereas similarity between two images by normalized correlation coefficient. Test the transparency and robustness against various attacks like cropping, noise, rotation, filtering. The proposed method should provide recoverable watermark without any reasonable amount of distortion even in case of attacks.
Digital watermarking, Discrete Wavelet Transform (DWT), Discrete cosine transform (DCT) Principal Component Analysis (PCA)
