Watermarking Still Images Using Parametrized Wavelet Systems

Abstract: We propose a wavelet-based watermarking scheme by dynamically constructing the filters embedded with the watermark as well as potentially the private key patterns associated with the individual images. This scheme explores the watermark dissemination in a non-traditional dimension, allows the dual purpose of the embedded data as either watermarks or private keys, and offers additional analysis and optimization through the dynamic filter choices. We also propose an additional systematic watermark detection scheme in terms of a trend criterion, which proves to be both robust and flexible. Moreover, our watermarking and detection processes are also investigated to include the defence against noises, cropping and distortions, and to include the non-availability of the original images at the detections