| 摘要 |
PURPOSE:To improve the recognition rate or the recognition precision without increasing a required time much, by changing the reference in extraction of character features to scan characters again. CONSTITUTION:Characters on an original are converted photoelectrically by a scanner, and the obtained analog signal is subjected to A/D conversion and is written in a memory. The video signal written in the memory is subjected to positioning, namely, one-character segmentation. Features of the pattern described by segmented one-character components of the binary video signal are extracted. For example, alphabet S and number 5 are very like each other but S has a jump in the last, and character S is characterized by having a recess part Q in this jump part. Then, the reference value is made smaller for rescanning, and recess part presence (f) is checked; and when this existence (f) is discriminated, character S is distinguished from number 5. After changing the reference value in feature extraction, characters are discriminated and pertinent characters are extracted while referring to a dictionary, and thus, the increment of the time required for character recognition is restrained as much as possible. |
