Contrast Enhancement Estimation for Digital Image Forensics

Understand

Inconsistency in contrast enhancement can be used to expose image forgeries.

• In this work, we describe a new method to estimate contrast enhancement from a single image.
• Our method takes advantage of the nature of contrast enhancement as a mapping between pixel values, and the distinct characteristics it introduces to the image pixel histogram.
• Our method recovers the original pixel histogram and the contrast enhancement simultaneously from a single image with an iterative algorithm.