IMAGE PROCESSING DEVICE, IMAGE PROCESSING METHOD, AND IMAGE PROCESSING PROGRAM

摘要

An image processing method is used to detect a letter by using a classifier generated through statistical learning of handling a sample image of a fixed size as supervised data, and includes the following steps. A conversion step acquires a converted image by geometrically converting a target image containing a letter to be detected such that the target image has a predetermined ratio defining an aspect ratio. A search step searches the converted image for one or more letter candidates each including a region of a possible letter by using the classifier. An integration step applies clustering to the letter candidates, integrating the letter candidates, and eliminates the letter candidate having low reliability A circumscribing step cuts a letter out of the letter candidate that has been integrated and has not been eliminated, and generates a rectangle circumscribing the letter.