Clustered halftone dot design process

G - Physics – 06 – F

Patent

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G06F 3/12 (2006.01) H04N 1/405 (2006.01)

Patent

CA 2217555

ABSTRACT OF THE DISCLOSURE An idealized clustered screen is characterized spot clustering which is optimized so that clusters are about the same size and shape as they grow and are approximately equally distanced though an image. Pixels are swapped within the screen to vary its appearance. An optimization process iteratively checks a quality metric based on the optimum conditions, as pixels are swapped until an optimum screen appearance is obtained. -19-

Écran à groupage idéalisé caractérisé par l'optimisation du groupage d'éléments épars pour que les groupes soient à peu près tous de même taille et de même forme à mesure qu'ils se développent, et à distance à peu près égale les uns des autres dans une image. Les pixels sont permutés à l'intérieur de l'écran pour varier l'aspect de celui-ci. Un processus d'optimisation vérifie itérativement une mesure de la qualité en fonction de conditions optimales, les pixels étant permutés jusqu'à ce que l'écran offre un aspect optimal.

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