Color image watermark decoder by modeling quaternion polar harmonic transform with BKF distribution

作者：

Highlights：

• The statistical properties of QPHTs are applied to color image watermarking algorithm for the first time.

• The BKF function is adopted to model the distribution of QPHT magnitudes, which promises optimum decoder.

• The watermark capacity of our algorithm is much larger than previous statistics-based watermarking algorithms.

• The proposed algorithm provides better imperceptibility and robustness compared to state-of-the-art watermarking methods.

摘要

•The statistical properties of QPHTs are applied to color image watermarking algorithm for the first time.•The BKF function is adopted to model the distribution of QPHT magnitudes, which promises optimum decoder.•The watermark capacity of our algorithm is much larger than previous statistics-based watermarking algorithms.•The proposed algorithm provides better imperceptibility and robustness compared to state-of-the-art watermarking methods.

论文关键词：Color image watermarking,Quaternion polar harmonic transforms,Bessel K form distribution,Maximum likelihood decoder

论文评审过程：Received 10 July 2019, Revised 20 May 2020, Accepted 10 July 2020, Available online 12 July 2020, Version of Record 15 July 2020.

论文官网地址：https://doi.org/10.1016/j.image.2020.115946