Processor/memory non-intensive rendering for page printers

G - Physics – 06 – F

Patent

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Details

G06F 3/12 (2006.01) G06K 15/12 (2006.01)

Patent

CA 2226125

Memory storage and memory bandwidth requirements of a color laser printer (or other printer having real-time printing constraints) are reduced by representing image information in a compressed format throughout the rendering process. At any one time during the rendering process, preferably, only a single scan line is expanded to the full, uncompressed format required for eventual printing. The rendered scan line is then recompressed and stored in memory. When all scan lines have been processed and are stored in memory in compressed format, the entire image is then expanded in real time.

On réduit les exigences de stockage et de largeur de bande de mémoire d'une imprimante laser couleur (ou d'une autre imprimante à contraintes d'impression en temps réel) en représentant des informations d'image en un format compressé tout au long du processus de rendu. Pendant ce processus, à tout moment, une seule ligne de scannage est de préférence restituée intégralement dans le format décompressé exigé par l'impression finale. La ligne de scannage ainsi rendue est alors recompressée et mise en mémoire. Quand toutes les lignes de scannage ont ainsi été traitées et mises en mémoire en format compressé, l'ensemble de l'image est alors décompressé en temps réel.

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