@conference {uvigo:improvingdatahiding, title = {Improving Data Hiding Performance by Using Quantization in a Projected Domain}, booktitle = {IEEE International Conference on Multimedia and Expo (ICME)}, year = {2002}, month = {August}, address = {Lausanne, Switzerland}, keywords = {data-hiding, watermarking}, author = {Fernando P{\'e}rez-Gonz{\'a}lez and F{\'e}lix Balado} }