1. An image processing device comprising: a moving image generation circuitry configured to selectively generating a parallelly animated moving image in which a plurality of object images are each parallelly animated so as to visually create a simultaneous movement in the plurality of object images, the plurality of the object images having been selected from a series of object images that have been generated by extracting a moving object from frame images of a source moving image; and an image output circuitry configured to output the parallelly animated moving image, wherein the moving image generation circuitry selectively generates any one of the parallelly animated moving image and a singly animated moving image in which a single object image is animated, the single object image having been selected from the series of object images, and the moving image generation circuitry generates the parallelly animated moving image in a case where a movement amount of the object exceeds a threshold.