Patent ID: 8923625

Claim:
An original image searching device comprising: an acquiring unit that acquires an image-after-changed to which a change is added to an original image stored in an image storage, the image-after-changed having contents different from contents of the original image; a form image information storage that stores form images each including: a discriminating region corresponding to where the change is added, and information specifying where each discriminating region is located on each of the form images, each of the form images being stored in correlation with each of the information specifying where each discriminating region is located on each of the form images; a form image specifying unit that determines whether a form image is a form image of the image-after-changed by first comparing each of the form images stored in the form image information storage with the image-after-changed; a checking region specifying unit that: reads out from the information specifying where a discrimination region is located on the form image determined by the form image specifying unit, and specifies a checking region at a location where the discrimination region is located on the form image determined on at least one image stored in the image storage based on the read out information specifying where the discrimination region is located on the form image determined; and an original image specifying unit that determines the original image of the image-after-changed by second comparing the checking region and contents in the checking region of each of the at least one image stored in the image storage and a checking region and the contents of the image-after-changed, wherein if an entire portion including the contents of an image included in the checking region of each of the at least one image stored in the image storage is contained in an entire portion including the contents of an image included in the checking region of the image-after-changed, it is determined that a corresponding stored image of the at least one image stored in the image storage is the original image including the contents of the original image of the image-after-changed, wherein the at least one image stored in the image storage is stored in a different storage location than the form images.