GENERATING A HALFTONE

1 . A method comprising;

generating halftone data representing a plurality of pixels in a halftone, the halftone data comprising:

first data representing a first halftone screen, the first halftone screen associating a first subset of the plurality of pixels in the halftone with a first colorant; and

second data representing a second halftone screen, the second halftone screen associating a second subset of the plurality of pixels in the halftone with a second colorant, the second colorant being different from the first colorant;

identifying one or more pixels common to the first subset of the plurality of pixels and the second subset of the plurality of pixels; and

modifying the second data to remove the one or more pixels from the second subset of pixels.

2 . The method of claim 1 , wherein the first subset of the plurality of pixels defines a first continuous region corresponding to first dot in a first amplitude modulated halftone pattern and the second subset of the plurality of pixels defines a second continuous region corresponding to a second dot in a second amplitude modulated halftone pattern.

3 . The method of claim 1 , wherein the first subset of the plurality of pixels are spatially distributed according to a first frequency modulated halftone pattern and the second subset of the plurality of pixels are spatially distributed according to a second frequency modulated halftone pattern.

4 . The method of claim 1 , wherein the first colorant is relatively more light absorbent than the second colorant.

5 . The method of claim 1 , wherein the first colorant comprises a black colorant.

6 . A non-transitory computer-readable storage medium comprising computer-executable instructions which, when executed by a processor, cause a computing device to perform a method comprising:

determining a first subset of a plurality of pixels in a halftone to be associated with a first colorant;

determining a second subset of the plurality of pixels in the halftone to be associated with a second colorant, the second colorant being different from the first colorant;

generating pixel data associating a pixel in the plurality of pixels in the halftone with the first colorant and not the second colorant when the pixel is included in the first subset and the second subset; and

generating pixel data associating the pixel in the plurality of pixels in the halftone with the second colorant and not the first colorant when the pixel is included in the second subset and not the first subset.

7 . The non-transitory computer-readable storage medium of claim 6 , wherein the first subset and the second subset set are determined in one or more halftoning processes.

8 . The non-transitory computer-readable storage medium of claim 6 , wherein the method comprises:

controlling a colorant deposition system to print the halftone in accordance with the pixel data.

9 . An apparatus comprising:

a processor;

a color deposition system to deposit a plurality of colorants on a print medium; and

a memory storing computer-executable instructions which, when executed by the processor, cause the processor to:

receive halftone data representing a plurality of pixels in a halftone, the halftone data comprising:

first data representing a first halftone screen, the first halftone screen associating a first subset of the plurality of pixels in the halftone with a first colorant; and

second data representing a second halftone screen, the second halftone screen associating a second subset of the plurality of pixels in the halftone with a second colorant, the second colorant being different from the first colorant;

control the color deposition system to deposit the first colorant and not the second colorant at a location on the print medium associated with a pixel in the halftone, when the pixel is included in the first subset and the second subset; and

control the color deposition system to deposit the second colorant and not the first colorant at the location on the print medium associated with the pixel in the halftone when the pixel is included in the second subset and not the first subset.

10 . The apparatus of claim 9 , wherein the first subset of the plurality of pixels defines a first continuous region corresponding to first dot in a first amplitude modulated halftone pattern and the second subset of the plurality of pixels defines a second continuous region corresponding to a second dot in a second amplitude modulated halftone pattern.

11 . The apparatus of claim 9 , wherein the first subset of the plurality of pixels are spatially distributed according to a first frequency modulated halftone pattern and the second subset of the plurality of pixels are spatially distributed according to a second frequency modulated halftone pattern.

12 . The apparatus of claim 9 , wherein the first colorant is relatively more light absorbent than the second colorant.

13 . The apparatus of claim 9 , wherein the first colorant comprises a black colorant.

14 . The apparatus of claim 9 , wherein the computer-executable instructions, when executed by the processor, cause the computing device to:

control the color deposition system to deposit the first colorant and not the second colorant at the location on the print medium associated with the pixel in the halftone, when the pixel is included in the first subset and not the second subset.