The following publications are possibly variants of this publication:
- Rotation Invariance in 2D-FRFT with Application to Digital Image WatermarkingLei Gao, Lin Qi, Yongjin Wang, Enqing Chen, Shouyi Yang, Ling Guan. vlsisp, 72(2):133-148, 2013. [doi]
- A Rotation-Invariant Secure Image Watermarking Algorithm Incorporating Steerable Pyramid TransformJiangqun Ni, Rongyue Zhang, Jiwu Huang, Chuntao Wang, Quanbo Li. iwdw 2006: 446-460 [doi]
- 2D-FRFT Based Frequency Shift-Invariant Digital Image EncryptionLei Gao 0001, Lin Qi, Ling Guan. icassp 2021: 2420-2424 [doi]