CHARACTER RECOGNIZING METHOD

• Main Authors: YOSHIDA KAZUSHI, KIUCHI TETSUO
• Format: Patent
• Language: English
• Published: 20.11.1991
• Subjects: CALCULATING; COMPUTING; COUNTING; HANDLING RECORD CARRIERS; PHYSICS; PRESENTATION OF DATA; RECOGNITION OF DATA; RECORD CARRIERS

PURPOSE:To improve the rate of recognition by calculating a ratio to a standard character in a document including a character to be recognized and comparing this ratio with a reference value calculated in advance concerning at least one of the character width, character height, area of circumscribed rectangle and aspect ratio of the character to be recognized. CONSTITUTION:Remaining difference Hn of the normalized character height to be defined by expressions I and II, and remaining difference Wn of the normalized character width is calculated. In the expressions I and II, H and W show the character height and character width to be measured from the character picture, Hs and Ws show the standard character height and standard character width in the II document, Hmuj and Hdeltaj show the average value and standard deviation of the ratio to the standard character height for each character form of a character type (j), and Wmuj and Wdeltaj show the mean value and standard deviation of the ratio to the standard character height for each character form of this character type (j). Next, remaining difference NVn of a normalized longitudinal discrete number and remaining difference NHn of a lateral discrete number is calculated. Namely, concerning one of the character width, character height, area of the circumscribed rectangle and aspect ratio of the character to be recognized at least, the ratio to the respectively corresponding amount of the standard character in the document including the character to be recognized is estimated from the character size. Thus, recognition is enabled with high accuracy.