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Affine Transformation Method for Image Character Fonts

IP.com Disclosure Number: IPCOM000060182D
Original Publication Date: 1986-Mar-01
Included in the Prior Art Database: 2005-Mar-08

Publishing Venue

IBM

Related People

Authors:
Miyazawa, A [+details]

Abstract

This article describes a method of affine transformation to expand, reduce and rotate image character fonts, in which a transformation matrix is decomposed into three matrices. Generally, the affine transformation on a two-dimensional plane is expressed as follows: (Image Omitted) By the above equation, a pel (picture element) originally located at (x, y) is moved to (x' y'). The following is a transformation matrix to rotate by s. (Image Omitted) According to the present method, the transformation matrix is decomposed into three matrices as follows: (Image Omitted) The first matrix A corresponds to a vertical inclination in which a horizontal line is inclined as shown in Fig. 1A. The second matrix B corresponds to a horizontal inclination in which a vertical line is inclined as shown in Fig. 1B.