A robust watermarking scheme using sequency-ordered complex Hadamard transform

• Main Authors: Aung, Aye, Ng, Boon Poh, Rahardja, Susanto
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2011
• Subjects: DRNTU::Engineering::Electrical and electronic engineering::Electronic systems::Signal processing
• Online Access: https://hdl.handle.net/10356/93997; http://hdl.handle.net/10220/7089
• Institution: Nanyang Technological University

This paper presents a robust phase watermarking scheme for still digital images based on the sequency-ordered complex Hadamard transform (SCHT). The transform matrix of the SCHT exhibits sequency ordering which is analogous to frequency in the discrete Fourier transform (DFT). Hence, sequency-based...