System for optical character recognition (ocr) using intelligent template matching.

摘要

Template matching techniques are one of the simplest and oldest techniques in optical character recognition. The claimed invention uses template matching for character recognition. The invention does not require an entire input template to be matched but only the critical part of the input template. The invention does not require any mathematical formulae for selection of the template as well as for the actual comparison of templates. For any N x N size template a standard template matching needs N2 comparisons but the claimed invention requires (3n/2) comparisons at the maximum. The claimed system comprises of a counting block which determine the count of the input template which is nothing but a matrix with binary values. The system further includes classification block which classifies the given input. A target character repository provides a sequence of matching functions to select and recognize the correct character. The matching function block consists of all the matching functions that require simple binary comparison and by doing so avoid complicated mathematical computations. The performance of the preferred embodiment of the invention is measured by the number of comparisons required for each character input template for accurate selection and final recognition.