An imperceptible digital imagewatermarking technique by compressed watermark using PCA

Abstract

To provide secure communication, a modified digital watermarking scheme using discrete cosine transform (DCT) and principal component analysis (PCA) has been proposed. This scheme uses DCT for watermarking and PCA for compressing the watermark. In this technique, PCA in addition to DCT is used for watermarking the digital image to improve the quality of the watermarked image.