US Patent 7627196 Image processing device and image capturing device

An image processing device comprises: plane conversion means which receives a subject image in which a subject having a particular shape has been captured and shape information about three-dimensional shape of the subject from the outside and converts the subject image into a plane image in which the subject is viewed from a prescribed direction based on the shape information; and in-plane position detection means which recognizes a subject area in the plane image as an area representing the subject and determines a position of the subject in the plane image.