Control Of Ink Ejection Amount Based on Dot Formation Order
First Claim
1. A printing method of printing on a printing medium, comprising:
- performing a halftone process with a dither matrix on image data that represents a tone value of each pixel making up an original image to determine a state of dot formation at each of print pixels of a print image that is to be formed on the printing medium, and generating dot data that represents the determined state of dot formation; and
generating a print image by mutually combining each of dot groups that are formed at each of a plurality of pixel groups in a common print region according to the dot data, the plurality of pixel groups being assumed to have different physical conditions with respect to the dot formation,wherein the dither matrix stores each threshold value such that a number of dots to be allocated to each of the plurality of dot groups is determined according to a dot formation order of each of the plurality of dot groups in the common print region in the halftone process.
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Abstract
The invention provides a printing method of printing on a printing medium. The method includes: performing a halftone process with a dither matrix on image data that represents a tone value of each pixel making up an original image to determine a state of dot formation at each of print pixels of a print image that is to be formed on the printing medium, and generating dot data that represents the determined state of dot formation; and generating a print image by mutually combining each of dot groups that are formed at each of a plurality of pixel groups in a common print region according to the dot data, the plurality of pixel groups being assumed to have different physical conditions with respect to the dot formation. The dither matrix stores each threshold value such that a number of dots to be allocated to each of the plurality of dot groups is determined according to a dot formation order of each of the plurality of dot groups in the common print region in the halftone process.
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Citations
11 Claims
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1. A printing method of printing on a printing medium, comprising:
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performing a halftone process with a dither matrix on image data that represents a tone value of each pixel making up an original image to determine a state of dot formation at each of print pixels of a print image that is to be formed on the printing medium, and generating dot data that represents the determined state of dot formation; and generating a print image by mutually combining each of dot groups that are formed at each of a plurality of pixel groups in a common print region according to the dot data, the plurality of pixel groups being assumed to have different physical conditions with respect to the dot formation, wherein the dither matrix stores each threshold value such that a number of dots to be allocated to each of the plurality of dot groups is determined according to a dot formation order of each of the plurality of dot groups in the common print region in the halftone process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A printing apparatus for printing on a printing medium, comprising:
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a dot data generator that performs a halftone process with a dither matrix on image data that represents a tone value of each pixel making up an original image to determine a state of dot formation at each of print pixels of a print image that is to be formed on the printing medium, and generating dot data that represents the determined state of dot formation; and a print unit that generates a print image by mutually combining each of dot groups that are formed at each of a plurality of pixel groups in a common print region according to the dot data, the plurality of pixel groups being assumed to have different physical conditions with respect to the dot formation, wherein the dither matrix stores each threshold value such that a number of dots to be allocated to each of the plurality of dot groups is determined according to a dot formation order of each of the plurality of dot groups in the common print region in the halftone process.
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11. A method for generating a dither matrix that stores each of a plurality of threshold values in each element, the plurality of threshold values being used for determining state of dot formation to generate a print image according to an input tone value,
wherein the print image is generated by mutually combining each of dot groups formed at each of a plurality of pixel groups in a common print region, the plurality of pixel groups being assumed to have different physical conditions with respect to the dot formation, and the method comprising determining a storage element of each threshold value such that a number of dots to be formed at each of the plurality of pixel groups gets closer to each number of dots to be allocated, the allocation being previously determined according to a dot formation order of each of the plurality of dot groups in the common print region.
Specification