APPARATUS, METHOD AND SYSTEM FOR DOCUMENT CONVERSION, APPARATUSES FOR DOCUMENT PROCESSING AND INFORMATION PROCESSING, AND STORAGE MEDIA THAT STORE PROGRAMS FOR REALIZING THE APPARATUSES

An apparatus for document conversion that are capable of facilitating conversion of document image data to an electronic document having table of contents data even with a limited storage resource. The document image analysis section 302 extracts character regions from a document image 301. The contents/index/footer conversion section 307 generates table of contents data based on the extracted character regions and page numbers of the character regions. An electronic document having a table of contents is generated based on the document image 301 and the generated table of contents data. Link information is added to respective ones of items in the generated table of contents data for linking the items in the generated table of contents data with corresponding positions in the electronic document in which the items are described.