A robust watermarking algorithm based on a new orthogonal complex transform

作者：Zhang Yue^*; Shu Hua Zhong; Wu Jia Song; Luo Li Min

来源：Acta Electronica Sinica, 2013, 41(8): 1574-1579.

DOI：10.3969/j.issn.0372-2112.2013.08.019

• Approximate distribution
• Host images
• Human Visual System
• Marked image
• Optimal detectors
• Robust watermarking
• Sequency-ordered complex

A new robust watermarking algorithm based on conjugate symmetric sequency-ordered complex Hadamard transform (CS-SCHT) is proposed in this paper. At the phase of embedding, the magnitude of the CS-SCHT coefficients of host image is selected as support of watermark, and a new human visual system is designed to improve the invisibility of marked image. Kolmogorov-Smirno method is used to estimate the approximate distribution of the coefficients' magnitude, and then a locally optimal detector is constructed based on the approximate distribution. Experimental results show that the CS-SCHT is suitable for watermark application, and the proposed detector and human visual system can provide good performance.

• 出版日期2013
• 单位东南大学