Rotation Invariance in 2D-FRFT with Application to Digital Image Watermarking. Gao, L., Qi, L., Wang, Y., Chen, E., Yang, S., & Guan, L. Journal of Signal Processing Systems, 72(2):133–148, aug, 2013.
Rotation Invariance in 2D-FRFT with Application to Digital Image Watermarking [link]Paper  doi  bibtex   
@article{Gao2013,
author = {Gao, Lei and Qi, Lin and Wang, Yongjin and Chen, Enqing and Yang, Shouyi and Guan, Ling},
doi = {10.1007/s11265-012-0722-2},
issn = {1939-8018},
journal = {Journal of Signal Processing Systems},
month = {aug},
number = {2},
pages = {133--148},
title = {{Rotation Invariance in 2D-FRFT with Application to Digital Image Watermarking}},
url = {http://link.springer.com/10.1007/s11265-012-0722-2},
volume = {72},
year = {2013}
}

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