Rolling shutter

Article summary

Q-400 six-blade propeller, with severe rolling-shutter distortion from a Pixel 3 camera [[File:Rolling_shutter_SMIL.svg|thumb|right|link= |Simulation of the rolling-shutter effect on a rotating propeller and a moving car [ (click for SMIL animation)] Rolling shutter is a 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 the image of the scene are recorded at the same instant – however, during playback, the entire image of the scene is displayed at once, as if it represents a single instant in time. This produces predictable distortions of fast-moving objects or rapid flashes of light, referred to as rolling shutter effect. This process contrasts with global shutter, in which the entire frame is captured at the same instant. The rolling shutter can be either mechanical or electronic. The advantage of this electronic rolling shutter is that the image sensor can continue to gather photons during the acquisition process, thus effectively increasing sensitivity. It is found on many digital still and video cameras using CMOS sensors.…

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