Remember how literacy and photo devices, such as letters and figures

摘要

The system is used for storing and photo-typesetting characters stored in the form of data of contours. Curved contours are not approximated by straight lines, but are approximated by curves. The data is stored to obtain a curve which is approximated to the curve of the contour approximated to contours of characters being reproduced based on the stored data. End points and one or more reference points are stored for each segment according to the degree of the approximating curve. Each point on the curve is calculated by interpolation and the corrdinates of the point compared with the position of the scanning beam of a laser or a CRT.