Implementation of a Feature-Adaptive Colour Image Copyright Protection Scheme

The increasing distribution of digital media over the Internet, and the simplicity of the digital systems have left the contents in the web vulnerable. With digital watermarking, we can impose ownership and copyright information inside digital media. In this paper, a phase congruency based digital colour image watermarking algorithm is proposed, which provides a higher degree of robustness, and excellent imperceptibility. Here, phase congruency has been used to detect the feature regions of the host image, and then the watermark has been infused into it using a novel technique called adaptive k-α blending. The coefficients of the k-α blending (k & α) are selected adaptively based on the phase congruency feature map of the host image. From rigorous testing, results indicate that our approach is robust against various geometric, non-geometric, and combined attacks.