6. The character segmenting method for a character recognition device, which is set forth in claim 4 , wherein: in said boundary search range setting step, said boundary search range is set from one end of said character string, and as a boundary position is set within said set boundary search range by said boundary position setting unit, a next boundary search range is set from said set boundary position; in said boundary position setting step, a boundary position is set for every character according to said boundary search range which is set sequentially.
4. A character segmenting method, in a character recognition device for recognizing characters by segmenting each character from a character string which is segmented from image data acquired by capturing a character string on a medium, for processing said image data to segment each character from said character string; the method comprising: detecting a boundary position of neighboring characters in said character string and segmenting each character; setting a range to search a boundary position of neighboring characters in said character string; and acquiring a boundary position of characters by using a discriminant analysis method within said set search range; wherein, in said acquiring a boundary position, a projection to said boundary search range is divided by a predetermined width into two regions; the within-region variance in each of two division regions, the between-region variance and the variance ratio between the within-region variance and the between-region variance are calculated; and the position to segment a character is set based on said calculated variance ratio.