Method for optimizing an image processing and printing process

H - Electricity – 04 – N

Patent

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H04N 1/54 (2006.01)

Patent

CA 2428343

The invention relates to a method for optimizing colored images emitted by a color printer on the non-white surfaces of substrates and for optimizing the amounts of printing ink used, wherein an image motif is processed by means of a computer-assisted image processing system in order to form a master copy which is ready for output. The inventive method determines, for each pixel, whether and with what color density, a white underprint can be applied to a corresponding pixel, using an algorithm based on overall color density SF . The surface of the substrate is thus only underprinted with white on the pixels of the master copy where the overall color density is lacking or low. .

La présente invention concerne un procédé pour optimiser des images en couleur produites par une imprimante couleur sur des surfaces de substrat non blanches et pour optimiser les quantités d'encre d'impression utilisées. Selon ce procédé, un motif d'image est traité au moyen d'un système de traitement d'image assisté par ordinateur, afin de donner un modèle prêt à sortir. Il est ensuite déterminé pour chaque point de l'image si ou avec quelle densité de couleur une sous-impression blanche est appliquée au point de l'image correspondant, au moyen d'un algorithme basé sur la densité de couleur globale S¿F?. La surface du substrat est alors sous-imprimée avec du blanc seulement aux points de l'image du modèle présentant une faible densité de couleur globale ou une densité de couleur globale insuffisante.

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