Wolfgang Funk. Image watermarking in the Fourier domain based on global features of concentric ring areas. In Edward J. Delp III, Ping Wah Wong, editors, Security and Watermarking of Multimedia Contents IV, San Jose, CA, USA, January 19, 2002. Volume 4675 of SPIE Proceedings, pages 596-599, SPIE, 2002. [doi]
Abstract is missing.