1. A character image feature dictionary preparation apparatus comprising: an extracting portion for extracting image features of a character image in units of character according to a plurality of feature-extracting methods; a calculating portion for converting into vectors the image features extracted by the respective feature-extracting methods and calculating a resultant vector by synthesizing a plurality of feature vectors for the respective feature-extracting methods; and a storing portion for storing a calculated resultant vector as an image feature in units of character.