A content-based digital image watermarking algorithm robust against JPEG compression

Watermarking (imperceptible insertion of data into the host image or soundtracks) has attracted many research interests in the recent decade. The aim of this correspondence is to introduce a none-blind, content-based method for image watermarking. It employs properties of Human Visual System (HVS) and is capable of embedding a high-energy watermark (consequently robust against lossy compressions and other kinds of attacks) while prevents perceptible degradation in the host image. To modulate the binary coded watermark on a spread- spectrum noise, the introduced algorithm is followed by spread- spectrum watermarking. The algorithm was simulated and experimental results represent magnificent improvement in watermarking capacity and accuracy of extraction.