CHARACTER EXISTENCE DETERMINATION METHOD, CHARACTER EXISTENCE DETERMINATION DEVICE AND CHARACTER EXISTENCE DETERMINATION PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a character existence determination method capable of determining whether a character exists in a prescribed area even when there is a positional deviation between a window area image and a reference image.;SOLUTION: The method includes a first determination step for calculating a difference image by subtracting the window area image from the reference image and determining whether a difference absolute value between an average value of a first side area of the difference image and an average value of a second side area facing the first side area of the difference image is beyond a first threshold value and below a second threshold value, and a second determination step for determining whether an average value of a center lateral area of the difference image is beyond a third threshold value and a standard deviation of the center lateral area of the difference image is beyond a forth threshold value, or an average value of the center longitudinal area of the difference image is beyond a fifth threshold value and a standard deviation of the center longitudinal area of the difference image is beyond a sixth threshold value. When the determination result of the first determination step is negative and the determination result of the second determination step is negative, it is determined that there is no character in the window area image.;COPYRIGHT: (C)2012,JPO&INPIT