@conference {eusipco04, title = {Spread Spectrum Watermarking for Real Images: Is Everything So Hopeless?}, booktitle = {European Signal Processing Conference (EUSIPCO)}, year = {2004}, month = {September 6-10}, address = {Vienna, Austria}, author = {Oleksiy Koval and Sviatoslav Voloshynovskiy and Fernando P{\'e}rez-Gonz{\'a}lez and Frederic Deguillaume and Thierry Pun} }