Digital Forgeries: Problems and Challenges

Digital Forgeries: Problems and Challenges

Digital Forgeries: Problems and Challenges

Digital Forgeries: Problems and Challenges

Detecting Digital Forgeries Using Bispectral Analysis

With the rapid increase in low-cost and sophisticated digital technology the need for techniques to authenticate digital material will become more urgent. In this paper we address the problem of authenticating digital signals assuming no explicit prior knowledge of the original. The basic approach that we take is to assume that in the frequency domain a “natural” signal has weak higher-order st...

Detecting Digital Image Forgeries using Color Constancy

UAbstract . There is a gradual increase in the number of composite pictures containing people. Due to the existence of such compositions, the trust in photographs is reduced. Due to the invention of powerful digital image editing tools, it has been so easy to manipulate images. Approaches that consider the illumination inconsistencies in digital images are of particular interest because a perfe...