Patent ID: 6224190
Filing Date: 2001-05-01
Classification: B41J,G06K,H04N

Abstract:
An ink-jet recording method for putting a plurality of ink dots on the same pixel position using multiple-color ink heads to record a color image, said ink-jet recording method comprising the steps of:(a) dividing a whole image area into a plurality of unit areas each composed of a predetermined plurality of pixels;(b) for each unit area of the image to be recorded, calculating a total of ejection ink dots instructed to be printed in the unit area;(c) checking if the calculated total of ink dots exceeds a predetermined limit value;(d) if so, proportionally distributing the limit value to colors according to mutual ratios among numbers of ink dots of the colors to be ejected in the unit area and rounding each of distribution results to an integer to determine a number of ejection ink dots of each color in the unit area;(e) correcting the instructed number of ink dots of each color by reducing the same based on the determined number of ejection ink dots of each color;(f) ejecting ink from each head into the unit area according to the corrected number of ejection ink dots; and(g) when reducing the number of ejection ink dots in step (e), the ejection ink dots are thinned out according to an ejection ink dot reduction priority pre-established for each pixel position in the unit area.