| 摘要 |
PURPOSE:To decide the inclination of an input character at high speed with high accuracy by calculating the input angle of a character string from the peaks of direction histograms of edges found by taking the first derivative of a character print area. CONSTITUTION:A direction histogram calculating means 1 takes the first derivative of the character print area of an input image to find direction histograms of respective edges. A character string input angle calculating means 2 calculates the input angle of the character string from the peak values of the direction histograms calculated by the direction histogram calculating means 1. An input angle deciding means 3 compares the character input angle with a preset permissible range angle to decide whether or not the input angle is within the permissible range. Then when the input angle of the character string is within the permissible range, the segmentation processing and then recognition processing of characters are performed and when not, on the other hand, prompting for reinput or the rotation of the input image by the calculated character string input angle is performed to perform the character segmentation and recognition processing.
|
