Robust and secure fractional wavelet image watermarking. - Ehab H. Elshazly; Osama S. Faragallah; Alaa M. Abbas; Mahmoud Ashour; El-Sayed M. El-Rabaie; Hassan B. Kazemian; Saleh A. Alshebeili; Fathi E. Abd El-Samie; Hala S. El-sayed (Signal Image Video Process., 2015)