Method and apparatus for identification of documents, and computer product

摘要

In the document identification apparatus, a ruled line feature extraction section (102) determines a black pixel ratio of a document to be identified, and adds the black pixel ratio for each block to extract a ruled line feature. A ruled line feature verification section (106) verifies the ruled line feature with a ruled line feature already registered in a ruled line feature dictionary (104) to thereby identify the document. If identification is not possible with this procedure, a details judgment section (107) verifies the image data in a specific area with the image data (characters or the like) registered in a specific area dictionary (105).