APPARATUS AND METHOD FOR RECOGNIZING LETTER BY COMBINED RECOGNITION METHOD OF PIXEL-SHIFTED CAMERA DOCUMENT IMAGE

摘要

An apparatus and a method for recognizing letters with a camera by using a pixel-shifted document image combined recognition method are provided to improve quality of images by using an image reinforcing algorithm and remove an unrecognized document area by executing partial binarizing, and improve performance of recognizing letters of a camera by extracting a characteristic considering shape deformation of letters and combining different recognizers. An apparatus for recognizing letters by using a camera includes a sub-document image processor(1) processing an input image into sub-document images, wherein pixels are shifted, a binarizing unit(2) partially binarizing the sub-document images passing through an image reinforcing algorithm, a letter processor(5,6) extracting structural characteristic information of an individual letter and a pixel mobile network characteristic of a letter area to which the pixels are shifted, and a recognition processor(3,4) combining different recognizers classifying letter types and recognizing the individual letters for outputting a result of recognition.