Image processing system for printers and method of the same
AssigneeDestiny Technology Corporation
InventorsGuo-Tai Chen, Hui-Jan Chien
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Abstract
The present invention relates to a set of image processing method and systems to be used in printers with asymmetrical-resolution printing mode. The asymmetrical-resolution is defined as having an aspect ratio of n=X:Y. The system first picks up a symmetrical-resolution halftone table and then, by making use of an algorithm such as an interpolation such as a B-spline method, expand the symmetrical-resolution halftone table by n times along the width direction to obtain an asymmetrical-resolution halftone table, in accordance with which the system will subsequently do the necessary pre-print processing of halftoning in order to print out the corresponding image(s).
Claims10
An image processing method to be used in a printer having an asymmetrical-resolution printing mode to receive image data for printing out an corresponding image according to a halftoning process wherein said asymmetrical-resolution has a aspect ratio n said n=X:Y, the image processing method comprising the Steps of:
- picking up a symmetrical-resolution halftone table;
- expanding a chosen symmetrical-resolution halftone table along the width direction of said data's corresponding image by n times in order to acquire a asymmetrical-resolution halftone table according to an algorithm;
- and
- using said asymmetrical-resolution halftone table to do said pre-print process of halftoning on said image data for the subsequent printing out of said image.
An image processing system to be used in printers with an asymmetrical-resolution printing mode to receive image data which are halftoned prior to the corresponding image's being printed out, wherein the aspect ratio (n) of said asymmetrical-resolution is n=X:Y and wherein the image processing system comprises:
- a computation/conversion module which first picks up a symmetrical-resolution halftone table and then, by making use of an algorithm, expand said chosen symmetrical-resolution halftone table along the width direction of the data's corresponding image by n times in order to acquire an asymmetrical-resolution halftone table;
- and
- wherein by making use of said asymmetrical-resolution halftone table, said asymmetrical-resolution printer do the pre-print process of halftoning on said image data for the subsequent print out of said corresponding image.
Dependencies are inferred from the claim text.