Orthogonal transform watermarking techniques for authentification of digital images and documents

• Main Author: Shu, Feng
• Other Authors: Ho Tung Shuen, Anthony
• Format: Theses and Dissertations
• Published: 2008
• Subjects: DRNTU::Engineering::Electrical and electronic engineering::Electronic systems::Signal processing
• Online Access: https://hdl.handle.net/10356/3253
• Institution: Nanyang Technological University

In our transform-domain-based watermarking algorithms, two-level quantization is employed for both watermark embedding and extraction processes. Our public watermarking method is essentially extended from the semi-private approach and a spread-spectrum (SS) technique, which has been widely used in d...