Optical character reader with tangent detection for detecting tilt of

Abstract

A character reader comprises an input unit for reading characters by a scanner-typed photoelectric transfer unit as an image, creating the image data formed by binary pixel of white and black lying on the plain surface and entering the same, a tangent detecting unit for detecting tangent information on tangents contacting with black pixels forming a character string within the image data, a tilt deciding unit for deciding a representative tangent which is representative for the direction of a row of character string, from the above-mentioned tangents, on the basis of the tangent information detected by the tangent detecting unit.