Patent ID: 8340467

Claim:
An information processor comprising: a processor that implements the functions of: a first movement control section that sequentially moves a first image from a reference position to multiple first positions, in which displacements in a reference direction between the reference position and the multiple first positions are multiples of a reference distance, by performing a first process including at least one geometric transformation process for the first image; a first comparing section that compares the first image having been subjected to the first process with a second image each time the first movement control section performs the first process; a target first position selecting section that selects a target first position from among the multiple first positions based on the comparison result of the first comparing section; a second movement control section that sequentially moves the first image from the reference position to multiple second positions, in which displacements in the reference direction between the target first position and the multiple second positions are smaller than the reference distance, by performing a second process including at least one geometric transformation process for the first image after the target first position is selected; a second comparing section that compares the first image having been subjected to the second process with the second image each time the second movement control section performs the second process; a target second position selecting section that selects a target second position from among the multiple second positions based on the comparison result of the second comparing section; and a position aligning section that aligns the positions of the first image and the second image by performing a geometric transformation process for the first image based on the difference between the reference position and the target second position.