Importance

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Abstract

The invention utilizes polynomials, where the graphic objects are predetermined in the form of reference contours in contour coordinates. The generation process involves subdividing the length of each contour segment into a multiple of curve segments each, preferably a straight line. The coordinate points associated with the respective curve segments are compared with those of the given contour segment and the distance between them is determined. If a predetermined distance between them is exceeded, the coordinate location on the contour segment which is at the greatest distance from the straight line is chosen. A curve defined by the use of parametric spline functions is then laid between the starting and end point and incorporating the chosen base point. At a time when the predetermined distance no longer is exceeded, the base points assigned are stored in a memory. The apparatus contains a central processing unit, a register for storage of the scanned pixel matrix and the outside contours, and a register for storage of the reference contours and the spline data. Corner recognition and filtering circuitry provides the recognition of corners and filtering where the scanned contour is smoothed for determining the reference contour. A step counter and a step register are provided for coordination between the deviation stored in a register and the respective coordinates.

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First Claim