@conference {spieei09, title = {Model-based steganalysis using invariant features}, booktitle = {Media Forensics and Security}, year = {2009}, month = {January}, address = {San Jose, CA, U.S.A.}, keywords = {Invariant features, Model-based, Steganalysis}, author = {Tu-Thach Quach and Fernando P{\'e}rez-Gonz{\'a}lez and Gregory L. Heileman} }