Halftoning
AssigneeHewlett-Packard Development Company, L.P.
InventorsPeter MOROVIC, Jan MOROVIC
Life of this patent
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Abstract
An example computer-implemented method of generating a pattern of thresholds for halftone printing of an image is disclosed. The halftone pattern is generated by an analytical computation of threshold values in-situ using a quasicrystal function. Each halftone pattern produced is non-periodic yet possesses ordered character where the pattern does not line up perfectly with a shifted copy of itself. The generation of such halftone patterns is suited to applications where a single halftone threshold value may be used per pixel.
Claims15
A computer-implemented method of generating a pattern of thresholds for halftone printing of an image, the method comprising:
- using a quasicrystal function which relates the positions of pixels in the image to the halftone threshold value to be used.
A print processor for producing a quasicrystal print output comprising:
- receiving image data indicative of an image to be printed;
- using a quasicrystal function which relates the positions of pixels in the image to the halftone threshold value to be used at each pixel position of the image data;
- and
- comparing each pixel value with the corresponding threshold.
A computer program which, when executed by a processing system, causes the processing system to generate a pattern of thresholds for halftone printing of an image using a quasicrystal function which relates the positions of pixels in the image to the halftone threshold value to be used.
Dependencies are inferred from the claim text.