PARTITION HALFTONE FOR MULTI-TONE LEVEL OUTPUT DEVICE
First Claim
1. An image processing system comprising:
- a printing device configured to print a halftone dot using multi-tone levels, wherein the halftone dot comprises a plurality of pixels, and wherein each pixel is associated with a corresponding tone level; and
a processor configured to;
receive a request to print a bitmap comprised of one or more colors;
identify a grey level for each of the one or more colors;
associate one of the multi-tone levels with the identified grey level;
select a halftone matrix for the associated multi-tone level, wherein each of the multi-tone levels is associated with a different halftone matrix;
compare the identified grey level with a plurality of pixel threshold values of the selected halftone matrix to determine the corresponding tone level of each of the plurality of pixels; and
generate the halftone dot comprised of the plurality of pixels.
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Abstract
An image processing system includes a printing device configured to print a halftone dot using multi-tone levels. The halftone dot is made up of a plurality of pixels, and each pixel is associated with a corresponding tone level. The image processing system further includes a processor. The processor is configured to receive a request to print a bitmap including one or more colors and to identify a grey level for each of the one or more colors. One of the multi-tone levels is associated with the identified grey level, and a halftone matrix is selected for the associated multi-tone level. Each of the multi-tone levels is associated with a different halftone matrix. The processor is further configured to compare the identified grey level with a plurality of pixel threshold values of the selected halftone matrix to determine the corresponding tone level of each of the plurality of pixels.
57 Citations
20 Claims
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1. An image processing system comprising:
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a printing device configured to print a halftone dot using multi-tone levels, wherein the halftone dot comprises a plurality of pixels, and wherein each pixel is associated with a corresponding tone level; and a processor configured to; receive a request to print a bitmap comprised of one or more colors; identify a grey level for each of the one or more colors; associate one of the multi-tone levels with the identified grey level; select a halftone matrix for the associated multi-tone level, wherein each of the multi-tone levels is associated with a different halftone matrix; compare the identified grey level with a plurality of pixel threshold values of the selected halftone matrix to determine the corresponding tone level of each of the plurality of pixels; and generate the halftone dot comprised of the plurality of pixels. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of image reproduction comprising:
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partitioning a halftone cell into a number of halftone segments, wherein the number of halftone segments corresponds to a maximum number of available tone levels of a multi-tone level printing device; associating a halftone matrix with each of the halftone segments, wherein the halftone matrix comprises one or more regions of pixel threshold values; identifying a grey level of a digital image input; selecting the halftone matrix corresponding to the identified grey level, wherein the halftone matrix is associated with a range of grey levels; comparing the identified grey level with the pixel threshold values to determine a tone level of a plurality of pixels; and generating an output halftone dot comprised of the plurality of pixels. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A computer-readable medium having instructions stored thereon, wherein if the instructions are executed by at least one device, the instructions are operable to:
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receive a request to print a bitmap comprised of one or more colors; identify a grey level for each of the one or more colors; partition a full tone level into a number of grey scale ranges; compare the identified grey level with one or more of the number of grey scale ranges, wherein each of the number of grey scale ranges is associated with a halftone matrix; select the halftone matrix based on the comparison of the identified grey level, wherein the halftone matrix is comprised of one or more regions of pixel threshold values; compare the identified grey level with the plurality of pixel threshold values of the selected halftone matrix to determine a corresponding tone level of a plurality of pixels; and generate the halftone dot comprised of the plurality of pixels.
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15. The computer-readable medium according to claim 15, wherein the instructions are further operable to:
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partition a halftone cell into a number of halftone segments, wherein the number of halftone segments corresponds to a maximum number of available tone levels of a multi-tone level printing device; and associate the halftone matrix with one of the halftone segments. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification