| 摘要 |
PURPOSE:To enable character recognition by matching that absorbs two-dimensional expansion and contraction, by performing firstly horizontal one-directional normalization of expansion and contraction from projecting information on the horizontal axis of a character pattern, and then performing expansion and contraction matching in the vertical direction. CONSTITUTION:An input pattern is read from an input character pattern memory 1 as a signal 101, projecting information histogram on the horizontal axis is obtained and outputted as a projecting information signal 102. A mapping function generating device 3 obtains a mapping function of the projecting information signal 102 and a standard projecting information signal 104 and outputs as a mapping functon signal 103. A two- dimensional expansion and contraction matching device 5 reads the signal 101 and performs one-directional expansion and contraction normalization by using the number of mapping for each read character read as a signal 103, and reads the standard character pattern signal 106 of read character corresponding to above-mentioned mapping function stored in a standard character function memory 6, performs expansion and contraction matching in the vertical direction to find out difference, and outputs the difference between input character pattern and each read character as a signal 105. A discriminating device 7 reads it as a signal 105, and outputs, for instance, the result of output of character which is leaset in difference as a signal 107. |
