Survey on passive digital image authenticity check techniques

With the aid of advanced digital cameras and sophisticated digital image processing software,digital images can be more easily manipulated and altered than traditional images.Now digital forgeries are widely used,and take very bad effects on news community,entertainment world,academic community and law circle.But people cannot check the authenticity of digital images by naked eyes,so nowadays digital images authenticity check with powerful computer has become hot investigation.This paper presents recent advances in passive digital images authenticity check from statistical techniques,camera's sensor noise pattern,color filter array aberrations,perspective geometric and lighting analysis,also gives disadvantages of these techniques and predict some ways of future developing.