System and method for color dither matrix creation using human-vision-system gray matrix with cluster radii
AssigneesSony Corporation, Sony Electronics Inc.
InventorTed J. Cooper
Life of this patent
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Abstract
A system and method for creating dither matrices for printing in color. The disclosed method shows how to construct arrays for cyan, magenta, yellow, and black primary color printing for which only a single calculation using the cost function is involved. The disclosed method computes only a single dither array. Once the first array is generated, the computer software program creates the other arrays by translating points of the original array to corresponding points in the secondary array. In one embodiment translation is performed using a random number generator. In alternate embodiments, translation is performed by inversion and shifting of the first array.
Claims39
A method for color printing, comprising:
- deriving a second dither matrix from a first dither matrix for printing a first color by transforming a first position in said first dither matrix to form a second position in said second dither matrix.
A system for color printing, comprising:
- a first dither matrix stored and used for printing a first color;
- a central processing unit to derive a second dither matrix from said
- first dither matrix by transforming a first position in said first dither matrix to form a second position in said second dither matrix;
- and
- the second dither matrix used for printing a second color.
A system for color printing comprising:
- a first dither matrix used for printing a first color;
- a second dither matrix derived from the first dither matrix by
- transforming a first position in the first dither matrix to form a second position in the second dither matrix, said second dither matrix used for printing a second color.
A computer readable medium comprising instructions, which when executed in a processing system perform a process for color printing comprising deriving a second dither matrix from a first dither matrix used for printing a first color by transforming a first position in said first dither matrix to form a second position in said second dither matrix.
A system for color printing, comprising:
- means for printing a first color with a first dither matrix;
- means for deriving a second dither matrix from said first dither matrix by
- transforming a first position in said first dither matrix to form a second position in said second dither matrix;
- and
- means for printing a second color with said second dither matrix.
Dependencies are inferred from the claim text.