ShutterApp: Spatio-temporal Exposure Control for Videos

A camera’s shutter controls the incoming light that is reaching the camera sensor. Different shutters lead to wildly different results, and are often used as a tool in movies for artistic purpose, e.g., they can indirectly control the effect of motion blur. However, a physical camera is limited to a single shutter setting at any given moment. ShutterApp enables users to define spatio-temporally-varying virtual shutters that go beyond the options available in real-world camera systems. A user provides a sparse set of annotations that define shutter functions at selected locations in key frames. From this input, our solution defines shutter functions for each pixel of the video sequence using a suitable interpolation technique, which are then employed to derive the output video. Our solution performs in real-time on commodity hardware. Hereby, users can explore different options interactively, leading to a new level of expressiveness without having to rely on specialized hardware or laborious editing.

@Article { SBE19,
  author       = "Salamon, Nestor Z. and Billeter, Markus and Eisemann, Elmar",
  title        = "ShutterApp: Spatio-temporal Exposure Control for Videos",
  journal      = "Computer Graphics Forum (Proceedings of Pacific Graphics)",
  number       = "7",
  volume       = "38",
  year         = "2019",
  url          = "http://graphics.tudelft.nl/Publications-new/2019/SBE19"
}