CHARACTER RECOGNITION PROCESSING DEVICE, METHOD, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a character recognition processing device capable of performing character recognition precisely even in a low contrast image. SOLUTION: The device comprises: nonlinear brightness conversion means for performing brightness conversion processing for the brightness of each pixel based on a nonlinear brightness conversion curve in an input image including characters to be extracted so as to generate an input image after the brightness conversion; bandpass filter means for performing character extraction processing using a bandpass filter to generate a character part extraction image from the input image after the brightness conversion; superimposition section for performing superimposition processing in which the character part extraction image is superimposed on the input image to generate a character emphasizing image; and character recognition processing means for performing character recognition processing based on the character emphasizing image. COPYRIGHT: (C)2009,JPO&INPIT