1. An image processing device for visually applying a special effect by subjecting raw data that has been acquired by imaging to image processing, and creating image data that is capable of being viewed stereoscopically, comprising: a tone conversion section for tone converting the raw data, a three-dimensional image data processing section for carrying out at least one of clipping image data that has been tone converted by the tone conversion section as image data to be viewed stereoscopically, or carrying out geometric processing, to create three-dimensional image data, and a special effect image processing section for subjecting the three-dimensional image data created by the three-dimensional image data processing section to special image processing to apply a special effect that is analogous to an image that has been formed optically or a special effect that is analogous to an image formed by photographic film or by development and printing processing, and creating a three-dimensional special-effect image; wherein the special image processing is at least one selected from the group consisting of cross filter processing, soft focus processing, noise addition processing, shading processing, peripheral brightening processing, and miniature effect processing; and the special effect image processing section carries out the special image processing on each image data, among a plurality of image data for creating the three-dimensional image data, on the basis of an image data position corresponding to a specified position of one image data that is made a reference, and the position of the image data is within a specified range from a position of a subject image of the reference image data corresponding to the specified position.