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US 7,452,046 B2Granted
Method for preparing a print mask
AssigneeHewlett-Packard Development Company, L.P.
InventorsAlejandro Manuel De Pena, Joan Manuel Garcia, Santiago Garcia Reyero, Andreu Gonzalez, Andrew MacKenzie
Life of this patent
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Abstract
A method for preparing a mask for multi-pass printing, comprises determining a characteristic satellite drop spray pattern for printing in a multi-pass mode with a printhead. Positions in the mask are filled with pass numbers. The pass numbers in a given position are selected based on considerations of interactions among main drops and satellite drops.
Claims13
A method for preparing a mask for multi-pass printing, comprising:
- determining a characteristic satellite drop spray pattern, a characteristic satellite drop relative weight and satellite drop constraints for printing in a multi-pass mode with a printhead;
- filling positions in a print mask ;
- creating a constraint matrix comprising satellite drop constraints weighted by the relative weight of the characteristic satellite drop;
- applying the constraint matrix to a position to be filled in the print mask;
- determining the relative favorability of a candidate pass number;
- and
- filling the position to be filled in the print mask with a pass number, wherein the pass numbers in a given position are selected based on considerations of interactions among main drops and satellite drops.
4 more elements
The method of claim l, further comprising:
- considering candidate pass numbers for a particular position in a mask;
- expressing the favorability of each candidate pass number as main constraints and as satellite constraints, wherein the main constraints reflect considerations with regard to pass numbers in main neighbor positions or to be placed into main neighbor positions, wherein the main neighbor positions neighbor the particular position, and the satellite constraints reflect considerations with respect to pass numbers in satellite neighbor positions or to be placed into satellite neighbor positions, wherein satellite neighbor positions neighbor a satellite position corresponding to the particular position;
- consolidating the constraints to obtain a measure of favorability for each candidate pass number;
- selecting one of the candidate pass numbers for use at the particular position in the mask based on the measures of favorability.
1 more element
A method of printing, comprising:
- determining locations of a plurality of edge pixel positions of an image to be printed;
- defining a print mask to print the image, wherein edge pixel positions are printed during passes which hide a satellite drop within the image
- creating a constraint matrix comprising satellite drop constraints weighted by a relative weight of a characteristic satellite drop;
- applying the constraint matrix to a nosition to be filled in the print mask:
- determining relative favorability of a candidate nass number:
- and
- filling the position to be filled with a pass number.
4 more elements
Dependencies are inferred from the claim text.