Multiple blind re-watermarking with quantisation-based embedding

To facilitate the embedding of fingerprinting payload corresponding to multiple re-sellings of a single image, multiple re-watermarking is a convenient technique. In this application context, oblivious detection techniques are important. Quantisation-based embedding technique are difficult to apply in this context without adapting them to the multiple watermarking scenario. We investigate two extensions to a wavelet coefficient-tree based embedding technique which turn out to improve detection performance in case of multiple re-watermarking.