Methods and systems for screening images
AssigneeGlobal Inkjet Systems Limited
InventorsPhilip D A Collins, Nicholas Campbell Geddes
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Abstract
A method of screening a continuous-tone image is configured to produce an output image to be printed on a surface. The continuous-tone image comprises a plurality of pixels having respective corresponding intended print locations. The method includes selecting a first sequence comprising a subset of the plurality of intended print locations, the first sequence being selected based on properties of the plurality of intended print locations. For each intended print location in the first sequence, the method also includes identifying the corresponding pixel in the continuous-tone image to obtain a second sequence for an error diffusion process comprising the identified corresponding pixels in the continuous-tone image.
Claims32
A method of screening a continuous-tone image to produce an output image to be printed on a curved surface, wherein the continuous-tone image comprises a plurality of pixels having respective corresponding intended print locations on the curved surface that do not automatically correspond to actual print locations, the method comprising the steps of:
- selecting a first sequence comprising a subset of the plurality of intended print locations, the first sequence being selected based on properties of the plurality of intended print locations;
- for each intended print location in the first sequence, identifying the corresponding pixel in the continuous-tone image to obtain a second sequence for an error diffusion process comprising the identified corresponding pixels in the continuous-tone image.
A system for screening a continuous-tone image to produce an output image to be printed on a curved surface, wherein the continuous-tone image comprises a plurality of pixels having respective corresponding intended print locations on the curved surface that do not automatically correspond to actual print locations, the system comprising a processor configured to:
- select a first sequence comprising a subset of the plurality of intended print locations, the first sequence being selected based on properties of the plurality of intended print locations;
- for each intended print location in the first sequence, identify the corresponding pixel in the continuous-tone image to obtain a second sequence for an error diffusion process comprising the identified corresponding pixels in the continuous-tone image.
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Dependencies are inferred from the claim text.