There is a reason that most critical application scientific instrumentation cameras and astronomical cameras still use global shutter CCD's. Each frame is a self consistent time coherent image. With rolling shutters, even fast ones, picture elements that occur in portions of the frame not being scanned are not recorded. The classic example is flash banding from still cameras at live events. If one wanted to interpolate slow mo frames into a normal frame rate video stream, that can be done easily with global shutter frames. It is extremely difficult to do that without visible artifacts with any form of rolling shutter.
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