Document filing apparatus and method having document registration, comparison and retrieval capabilities

摘要

In a document filing apparatus, a file memory previously stores a plurality of documents including of line data, character data and image data. An image input section inputs a new document as image data. A character-line extraction section extracts line data and character data from the input image data. A document retrieval section retrieves a document to be compared with the new document from the file memory. A difference detection section detects differences of line data, character data and image data between the new document and the retrieved document. A register section registers the difference data and identification information of the retrieved document as the new document in the file memory.