Global Shutter Image sensors simultaneously expose all pixels in the frame at the same time period, store and read out all the pixels before the next frame is captured.  ​

Rolling Shutter sensors are the standard sensors for most high volume applications. They read out one or several lines of pixels in a sensor at a time in a line-by-line order, creating a “windowing” aperture that sweeps across the sensor from top to bottom.​

Reasons to consider a global shutter sensor camera: A global shutter has a much better ability to accurately freeze fast motion. A rolling shutter will have motion artifacts that appear as “shear” or distortion of moving objects, or the entire scene can shear if the camera itself is moving. This effect can be acutely visible in rotating objects.  ​

Disadvantages of Rolling Shutter: Misshapen fast moving objects, horizontal banding visible in flat fields from mains or LED frequency beating against the “line rate”, inability to use a strobe (such as for traffic cameras).​

Disadvantages of Global Shutter:  Lower sensitivity/higher noise, higher cost (more Si needed to store data on sensor; economies of scale).