Image processing method to reduce marking material coverage...

Details Image processing method to reduce marking material coverage... Image processing method to reduce marking material coverage...

G - Physics

06

F

G06F 3/14 (2006.01) G06K 15/10 (2006.01) G06T 1/00 (2006.01) H04N 1/50 (2006.01)

Patent

CA 2100886

A method for processing images for printing includes the steps of for each separation, making a pixel level determination of marking material coverage, based on the number of pixels within a given area that are turned on; if a determination is made that too much marking material will be placed within the given area, turning off a fraction of pixels in the area to reduce the amount of marking material that will be used for the given area; and to preventing artifacts from occurring in the pixel reduction step by utilizing a processing order through each given area which tends to randomize the turn off effect. Additionally, the results of the determination are compared for each separation, to determine that the turnoff result allows at least one corresponding pixel among each of the separations to be turned ON.

Méthode de traitement d'images à imprimer. Comprend les étapes suivantes : pour chaque séparation, effectuer une détermination de niveau de pixels applicable à la substance de marquage, en fonction du nombre de pixels d'une zone donnée qui sont activés; si un excédent de substance de marquage dans la zone donnée est déterminé, désactiver une fraction des pixels de cette zone afin de réduire la quantité de substance de marquage qui sera utilisée dans ladite zone; empêcher l'apparition d'artéfacts lors de la réduction des pixels en appliquant à chaque région donnée un ordre de traitement, tendant à randomiser l'effet de désactivation. En outre, les résultats de la détermination sont comparés pour chaque séparation afin de déterminer si le résultat de la désactivation permet de tenir activé au moins un pixel correspondant pour chacune des séparations.

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