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Rolling shutter describes the process of image capture in which a still picture (in a still camera) or each frame of a video (in a video camera) is captured not by taking a snapshot of the entire scene at a single instant in time but rather by scanning across the scene rapidly, vertically, horizontally or rotationally. Thus, not all parts of ...
English: An example of the Rolling shutter effect in action at Afton Down, Isle of Wight.This photograph was taken from a car travelling at approximately 50 miles per hour, and the rolling shutter effect has resulted in the fence and gate appearing slanted while more distant objects, such as the two walkers behind the fence and Afton Down in the distance appear normal.
In photography, a shutter is a device that allows light to pass for a determined period, exposing photographic film or a photosensitive digital sensor to light in order to capture a permanent image of a scene. A shutter can also be used to allow pulses of light to pass outwards, as seen in a movie projector or a signal lamp. A shutter of ...
Focal-plane shutters may also produce image distortion of very fast-moving objects or when panned rapidly, as described in the Rolling shutter article. A large relative difference between a slow wipe speed and a narrow curtain slit results in distortion because one side of the frame is exposed at a noticeably later instant than the other and the object's interim movement is imaged.
Effect of a rolling shutter on a spinning disc: Image title: The effect of a rolling shutter on a spinning disc simulated by CMG Lee. The jagged appearance is due to the small number of rows; the higher number of rows in a real camera results in smoother curves. Width: 1600: Height: 1200
Many photographic devices use a form of strip photography due to the use of a rolling shutter for engineering reasons, and exhibit similar effects. This is common both on cheaper cameras with an electronic shutter (more sophisticated electronic shutters are global, not rolling), as well as cameras with mechanical focal-plane shutters.