Geometric Distortion in Image and Video Watermarking. Robustness and Perceptual Quality Impact
Iwan Setyawan · Research Repository (Delft University of Technology) · 2004
The main focus of this thesis is the problem of geometric distortion in image and video watermarking. In this thesis we discuss the two aspects of the geometric distortion problem, namely the watermark desynchronization aspect and the perceptual quality assessment aspect. Furthermore, this thesis also discusses the challenges of watermarking data compressed in low bit-rates. The main contributions of this thesis are: ⢠A watermarking algorithm suitable for low bit-rate video has been proposed. ⢠Two different approaches has been proposed to deal with the watermark desynchronization problem. ⢠A novel approach has been proposed to quantify the perceptual quality impact of geometric distortion.