A New Pca–based Robust Color Image Watermarking Method

Although, the possibility of electronic storage and transmission has been bene cial for extending the intellectual communication, the easiness of copying and transmitting the data in the internet has increased the piracy and illegal use of owned artworks. As a result, digital data watermarking, has been under thorough investigation in recent years. The main aim of data hiding is to add some transparent signature to the data in an attack–resistance fashion, to be used for ownership claims. In this paper a new PCA–based watermarking method is proposed for color images. Rather than the dominant spatial, and the few available semi–spectral approaches, the proposed method uses the true redundancy in the spectral domain. The proposed watermarkingmethod is resistent to available attacks, such as sophisticated geometrical transformations, artistic effects, lossy compression, frequency domain ltering, motion blur, occlusion, and enhancement. Experimental results show the ef ciency of the proposed algorithm.