Method for screening of halftone images
AssigneeSharp Laboratories of America, Inc.
InventorChing-Wei Chang
Life of this patent
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Abstract
A method of making second generation halftone images lacking visible interference, includes selecting an image which has been halftoned; determining the number of tone levels required for each pixel of the halftoned image; identifying a halftone cell size; arranging a dot growth pattern to offset initial dot growth from the center of the halftone cell by defining sub-cells and growing the dot pattern relative to the sub-cell; and growing a dot pattern in a second generation halftone of the selected image.
Claims12
A method of making second generation halftone images lacking visible interference, comprising:
- selecting an image which has been halftoned;
- determining the number of tone levels required for each pixel of the halftoned image;
- identifying a halftone cell size;
- arranging a dot growth pattern to offset initial dot growth from the center of the halftone cell by defining sub-cells and growing the dot pattern relative to the sub-cell;
- and
- growing a dot pattern in a second generation halftone of the selected image.
A method of making second generation halftone images lacking visible interference, comprising:
- selecting an image which has been halftoned;
- determining the number of tone levels required for each pixel of the halftoned image;
- identifying a halftone cell size;
- arranging a dot growth pattern to offset initial dot growth from the center of the halftone cell by defining sub-cells and growing the dot pattern relative to the sub-cell;
- determining a sub-pixel level difference;
- and
- growing a dot pattern in a second generation halftone of the selected image, including growing the dot pattern evenly across the second generation image by setting the sub-pixel level difference to one.
Dependencies are inferred from the claim text.