The following publications are possibly variants of this publication:
- Image watermarking using polar harmonic transform with parameters in SL(2, r)Min Qi, Bing-zhao Li, Huafei Sun. spic, 31:161-173, 2015. [doi]
- Geometrically invariant image watermarking using Polar Harmonic TransformsLeida Li, Shushang Li, Ajith Abraham, Jeng-Shyang Pan. isci, 199:1-19, 2012. [doi]