@conference {icip03a, title = {Dither-Modulation Data hiding with distortion-compensation: exact performance analysis and an improved detector for JPEG attacks.}, booktitle = {IEEE International Conference on Image Processing (ICIP)}, year = {2003}, publisher = {IEEE}, organization = {IEEE}, address = {Barcelona, Spain}, keywords = {data-hiding, watermarking}, author = {Fernando P{\'e}rez-Gonz{\'a}lez and Pedro Comesa{\~n}a and F{\'e}lix Balado} }