Abstract
Understanding the passage of time is a natural human ability. Even though time flows in a single direction, its passage can be perceived in many ways. In a forensic event analysis — such as a terrorist attack or a public gathering — understanding how the event developed in time is essential for its reconstruction, comprehension, and fact-checking. In this talk, we will borrow scenes from ‘Back to the Future’ trilogy to understand which visual evidence can be used to identify the flow of time between two moments of a scene. We will also see how the Computer Vision and Machine Learning research community approaches the analysis of such pieces of evidence and, finally, how this can be used to detect when the timestamp of a photograph has been manipulated.