A New Algorithm of Attack Digital Watermarking Using Fractal IFS Coding
Jiaguang Sun · Acta Simulata Systematica Sinica · 2005
An important issue in watermarking refers to attack and its counteraction. So far, most existed attack algorithms are all kinds of compressions (e.g. the JPEG), geometric transformation, filtering, and noise imposing. A new algorithm of attack digital watermarking based on fractal IFS coding is presented. Image blocks with particular watermark information are substituted by other randomly selected Hausdorff-similar blocks under compression map, and removed by evaluating and impairing the watermark’s affection during the attacks. All experiments are done upon different types of images under DCT domain and wavelet domain and results show that these watermark detection score are degraded effectively after the attacks, and better results can be gotten when the attacks are combined with other signal processing operations.