PROBLEM TO BE SOLVED: To provide a technique capable of generating a tomogram suitable for comparison and search regardless of the deformation of an object.SOLUTION: A curved slice is obtained from a three-dimensional tomographic image of an object on the basis of a reference position in the three-dimensional tomographic image. A two-dimensional tomographic image corresponding to the curved slice is generated from the three-dimensional tomographic image.COPYRIGHT: (C)2015,JPO&INPIT