Numerical recipes in C: the art of scientific computing
Numerical recipes in C: the art of scientific computing
Understanding Benford's law and its vulnerability in image forensics
ICME'09 Proceedings of the 2009 IEEE international conference on Multimedia and Expo
DSP'09 Proceedings of the 16th international conference on Digital Signal Processing
Benford's law for natural and synthetic images
Computational Aesthetics'05 Proceedings of the First Eurographics conference on Computational Aesthetics in Graphics, Visualization and Imaging
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Benford's law had been proposed in the past as a way to modelize the probability distribution of the first digit in a set of natural numbers. We show in this paper that the magnitude of the gradient of an image obeys this law. We show, experimentally, that this also applies for the laplacian pyramid code. This yields to the field of entropy based coding which takes advantage of the a priori information about the probability of any symbol in the signal.