Robust Image Watermarking Using Non-Regular Wavelets
This is an incremental improvement for digital image security, enhancing watermarking against common compression attacks.
The paper tackled the problem of watermarking digital images by using non-regular wavelets to improve robustness and image quality, showing increased immunity against JPEG and JPEG2000 attacks.
An approach to watermarking digital images using non-regular wavelets is advanced. Non-regular transforms spread the energy in the transform domain. The proposed method leads at the same time to increased image quality and increased robustness with respect to lossy compression. The approach provides robust watermarking by suitably creating watermarked messages that have energy compaction and frequency spreading. Our experimental results show that the application of non-regular wavelets, instead of regular ones, can furnish a superior robust watermarking scheme. The generated watermarked data is more immune against non-intentional JPEG and JPEG2000 attacks.