Multipurpose Digital Watermarking Algorithm Based on Morphological Wavelet Transform

This paper proposes an novel multipurpose digital watermarking algorithm in morphological wavelet transform domain for two purposes: to notify the copyright owner with a visible gray image watermark and to protect the copyright with an invisible binary image watermark. Both watermarks are embedded in different blocks with different methods. The experiment results indicate that the morphological wavelet has state-of-the-art performance to make the visible water hard to remove and the invisible watermark robust.