Patent ID: 6398328
Filing Date: 2002-06-04
Classification: G06F,H04N

Abstract:
A method of generating print data from a printed image produced by a printing device operating at a first dots per inch (dpi) value, so that the image is composed of a plurality of dots, the image incorporating defects resulting during printing of the image, such as rotation of a print medium and blemishes of the image, the method comprising the steps of:scanning the printed image, at a sampling rate which corresponds to a second dpi value that exceeds the first dpi value by a predetermined factor, which is such that each dot of the image results in the generation of a set of at least two markers; generating data relating to the position and color value of each marker; detecting the defects in the image and assigning a data value to such defects; processing said data and applying the data value assigned to the defects to determine which of each of the markers generated for a respective dot should be recorded as a center for that dot; and generating print data as a result of the processing step, the print data relating to the position and print value of the markers determined as a result of processing the data.