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US 11,381,708 B2Granted
Halftone screens comprising cluster patterns having different centre positions
AssigneeHP Indigo B.V.
InventorsTal Frank, Oren Haik, Yotam Ben-Shoshan, Shay Bornstein
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Abstract
In an example, a method includes determining, using a processor, a first halftone screen comprising a plurality of cells. Each of the cells may contain a predetermined pixel cluster pattern, and a centre position of a cluster pattern within a first cell may be different to a centre position of a cluster pattern within a second cell.
Claims17
A method comprising:
- selecting, using a processor, an offset by sampling a specified distribution;
- determining, using the processor, a center position of a pixel cluster pattern of a first cell of a first halftone screen comprising a plurality of cells including the first cell and a second cell, by applying the selected offset to a true center of the pixel cluster pattern of the first cell;
- reselecting, using the processor, the offset by sampling the specified distribution;
- and
- determining, using the processor, a center position of a pixel cluster pattern of the second cell by applying the reselected offset to a true center of the pixel cluster pattern of the second cell,
- wherein the center position of the pixel cluster pattern of the first cell is different than the center position of the pixel cluster pattern of the second cell.
3 more elements
An apparatus comprising processing circuitry to perform processing comprising:
- selecting an offset by sampling a specified distribution;
- determining a center position of a pixel cluster pattern of a first cell of a first halftone screen comprising a plurality of cells including the first cell and a second cell, by applying the selected offset to a true center of the pixel cluster pattern of the first cell;
- reselecting the offset by sampling the specified distribution;
- and
- determining a center position of a pixel cluster pattern of the second cell by applying the reselected offset to a true center of the pixel cluster pattern of the second cell,
- wherein the center position of the pixel cluster pattern of the first cell is different than the center position of the pixel cluster pattern of the second cell.
3 more elements
A non-transitory machine readable medium comprising instructions which, when executed by a processor, cause the processor to perform processing comprising:
- selecting an offset by sampling a specified distribution;
- determining a center position of a pixel cluster pattern of a first cell of a first halftone screen comprising a plurality of cells including the first cell and a second cell, by applying the selected offset to a true center of the pixel cluster pattern of the first cell;
- reselecting the offset by sampling the specified distribution;
- and
- determining a center position of a pixel cluster pattern of the second cell by applying the reselected offset to a true center of the pixel cluster pattern of the second cell,
- wherein the center position of the pixel cluster pattern of the first cell is different than the center position of the pixel cluster pattern of the second cell.
3 more elements
Dependencies are inferred from the claim text.