1. An imaging device, comprising: an imager for repetitively capturing an optical image of an object scene; a first movement detector for detecting, as to each of a plurality of object scene images according to a time series output from said imager, a movement of a first feature point between said object scene image and one or plurality of first proximate object scene images temporally proximate to said object scene image; a clipper for performing clipping processing on each of said plurality of object scene images on the basis of the detection result by said first detector; a changer for changing an amount of the exposure to said imager in such a direction as to reduce the amount in response to a still image recording operation; a second movement detector for detecting a movement of a second feature point between a reference object scene image and one or plurality of second proximate object scene images temporally proximate to said reference object scene image out of a plurality of object scene images according to a time series that are output from said imager after execution of the changing processing by said changer; and a first adder for adding each of said one or plurality of second proximate object scene images to said reference object scene image while displacing the same on the basis of the detection result by said second movement detector.