Signal processing of engraving data involves correcting density values of image points on and/or adjacent to text contour with correction functions depending on density difference

摘要

The method involves searching for a text contour (23) in combined text-image data or in engraving data using a window operator (19), forming a density difference between the background and text densities and correcting density values of image points (N1-N4) lying on the text contour and/or adjacent to the text contour with correction functions depending on the density difference.