CHARACTER SHAPE FEATURE DICTIONARY PRODUCING APPARATUS, IMAGE DOCUMENT PROCESSING APPARATUS COMPRISING THE SAME, CHARACTER SHAPE FEATURE DICTIONARY PRODUCING PROGRAM, RECORDING MEDIUM WITH CHARACTER SHAPE FEATURE DICTIONARY PRODUCING PROGRAM RECORDED THEREON, IMAGE DOCUMENT PROCESSING PROGRAM, AND RECORDING MEDIUM WITH IMAGE DOCUMENT PROCESSING PROGRAM RECORDED THEREON

摘要

PPROBLEM TO BE SOLVED: To provide a character shape feature dictionary producing apparatus, in which searching accuracy is enhanced by improving character feature extracting method, and to provide an image document processing apparatus providing the same. PSOLUTION: An image of a character string composed of M characters in an image document is cut out, then image feature of each character image is extracted by dividing them for each character, then N (N1, integer) character images are selected as a candidate character in the descending order of matching degree from a character shape feature dictionary which stores the image feature of the character image by character based on the image feature, then a first MN index matrix corresponding to the number of cut out character strings is produced. A second index matrix in which the candidate string is adjusted to an understandable character string by applying lexical analysis using a predetermined language model to the candidate character string composed of a plurality of candidate characters which configure a first line of the first index matrix is produced and used for searching. PCOPYRIGHT: (C)2009,JPO&INPIT