1. An image processing device comprising: an acquisition unit configured to acquire information on an imaging position and an imaging direction in units of frame images that constitute a moving image obtained through capturing by an imaging unit; a converted image generation unit configured to generate a plurality of converted images having different imaging directions for each frame image that constitutes the moving image based on the frame image itself and preceding and succeeding frame images of the frame image; an evaluation value calculation unit configured to calculate an evaluation value for each converted moving image constituted by combining the converted image and the original frame image, the evaluation value being used to evaluate a blur between the converted images or between the original frame images; and a selection unit configured to select a converted moving image with less blur based on an evaluation value calculated by the evaluation value calculation unit.