Printer pixel size and toner/ink consumption reduction system

Details Printer pixel size and toner/ink consumption reduction system Printer pixel size and toner/ink consumption reduction system

B - Operations, Transporting

41

J

B41J 27/16 (2006.01) G06K 15/02 (2006.01) H04N 1/52 (2006.01)

Patent

CA 2210434

A system for reducing toner or ink consumption in rendering images, in which a transfer function is used to modify screening of the image to be rendered. Rendering systems including the use of single or multiple colors can employ the present invention. An algorithm is used in the present system to read in an arbitrary halftone dot and for each pixel in the halftone cell the output is a replicate of the threshold, Ta or Tb, surrounded by three pixels of white thresholds, a smooth transition from white to the now reduced maximum area coverage (such as 25%), while creating or maintaining the appearance of image uniformity at this reduced maximum area coverage.

Un système de réduction de la consommation du toner et de l'encre dans la restitution des images où la fonction de transfert sert à modifier la trame de l'image à restituer. Les systèmes de restitution qui font usage d'une ou de plusieurs couleurs peuvent exploiter la présente invention. Un algorithme sert dans le présent système à lire un point de demi-ton arbitraire et pour chaque pixel dans la cellule de demi-ton la sortie est un reproduction du seuil Ta ou Tb entouré d'une transition lisse entre le blanc et la couverture de zone maximal désormais réduite (comme à 25 %), tout en créant et en entretenant l'apparence de l'uniformité de l'image pour cette couverture de zone maximale réduite.

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