Optimizing printing speed and managing printed sheet...

B - Operations – Transporting – 41 – J

Patent

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B41J 2/07 (2006.01) B41J 2/17 (2006.01) B41J 2/21 (2006.01) G06K 15/10 (2006.01)

Patent

CA 2164891

The printing operation of an ink jet printer is controlled based on the density of the image to be printed. Using the density, a required drying time for each swath of printed matter is determined based on the image density. Also using the density, a maximum print frequency of firing the ink jets is determined. The density is determined by filtering stored print data by dividing the print data into blocks and determining a maximum number of ON pixels in a block. Such filtering enables clusters of ON pixels to be detected thus providing a more accurate determination of the density.

L'impression d'une imprimante à jet d'encre est contrôlée en fonction de la densité de l'image à imprimer. En se fondant sur la densité, un temps de séchage est déterminé pour chaque bande de document imprimé, en fonction de la densité de l'image. La fréquence maximale de déclenchement des jets d'encre est aussi déterminée en fonction de la densité. La densité est déterminée par filtrage des données d'impression stockées, en divisant les données d'impression en blocs, et en déterminant un nombre maximum de pixels encrés dans un bloc. Ce filtrage permet la détection de grappes de pixels encrés, ce qui permet de déterminer la densité avec une plus grande précision.

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