PCA based digital watermarking

This work evaluates a novel watermarking method based on Principle Component Analysis and effectiveness of the method to some watermark attacks. A PCA is used on a block by block basis to decorrelate the image pixel, watermarks are added in the Principle Components of an image. A theoretical description of the method is included together with experimental results in order to validate the methodology presented. Simulation shows the performance of the method to be robust for image cropping and some attacks such as additive noise, low pass filtering, median filtering, and jpeg compression. This research presents a new approach to watermarking fields with good performance in image cropping, and enhancement to this system with respect to robustness against various attacks is under investigation.