Form image management system and form image management method

A form image management method, comprising:

• obtaining, by a computer, a plurality of form images from a storage apparatus;
• retrieving, by the computer, a master image from the storage apparatus, the master image having a highest correlation with the obtained form image from among a plurality of types of master images;
• generating and storing, by the computer, as common-difference data, data of an image indicating a common-difference portion present in both a difference between the plurality of form images and a difference between the retrieved master image and one of the plurality of form images;
• generating, by the computer, in relation to each of the plurality of form images, difference data relative to data which is the retrieved master image on which an image indicated by the common-difference data has been superimposed, and storing the generated difference data in the storage apparatus.

A non-transitory computer-readable recording medium having stored therein a program for causing a computer to execute a process comprising:

• obtaining a plurality of form images from a storage apparatus;
• retrieving a master image from the storage apparatus, the master image having a highest correlation with the obtained form image from among a plurality of types of master images;
• generating and storing, as common-difference data, data of an image indicating a common-difference portion present in both a difference between the plurality of form images and a difference between the retrieved master image and one of the plurality of form images;
• and
• generating, in relation to each of the plurality of form images, difference data relative to data which is the retrieved master image on which an image indicated by the common-difference data has been superimposed, and storing the generated difference data in the storage apparatus.