An image processing device comprising an image display means which can display one of multiple images to be converted including at least an object of interest and a geometric conversion means that can convert the image to be conversion geometrically.
An image processing device comprising: an image display means which can display one of multiple images to be converted including at least an object of interest; a first reference point acceptance determination means which can accept the information on a first reference point candidate and a determination signal for the first reference point candidate which is displayed on an image to be converted based on the information on the first reference point candidate in answer to the operation by a user, and can determine a first reference point based on the information on the first reference point candidate for which the accepted determination signal has been determined; a second reference point acceptance determination means which can accept the information on a second reference point and can determine the second reference point; and a geometric conversion means which can convert the image to be converted geometrically and can output a converted image based on the first reference point that has been determined by the first reference point acceptance determination means and the second reference point that has been determined by the second reference point acceptance determination means.