Abstract:

Digital watermarking is a technique of embedding special information into media data.It is often used in the copyright protection and integrity verification of digital images,audio,video,and other media data. Image digital watermarking technology is one focus of the study. An image watermarking algorithm is proposed by combining Chinese Remainder Theorem (CRT) with Principal Components Analysis (PCA).The proposed algorithm is implemented in Matlab.The experiment results show that the algorithm is provably imperceptible comparing with LSB algorithm. In addition, it has strong robustness against some common attack methods,such as JPEG compression,adding noise,median filtering, and cropping.

Key words: digital watermarking;image encryption;chinese remainder theorem (CRT);principal components analysis (PCA)