Influence of mark embedding strategies on lossless compression of ultraspectral images

This paper describes a study regarding the influence of a watermarking scheme based on near-lossless JPEG2000 compression in the performance of lossless or near-lossless image compression methods. Due to the nature of ultraspectral imaging applications, the imperceptibility property becomes more important than capacity or robustness, which determines the design of the watermarking scheme. Four strategies for band watermarking are discussed, depending on which bands are selected for embedding the mark and how. Preliminary results show that both intra-granule and inter-granule band capacity and imperceptibility are very variable, thus an adaptive watermarking band strategy must be used. On the other hand, the proposed watermarking scheme does not alter the obtained compression ratio for watermarked images when compared to the original ones, for a reasonable capacity and an imperceptible quality loss.