Method and system of individualizing tone-reproduction curves calibration and applying thereof
View Patent ↗A method and system updates individualized calibrated tone-reproduction curves. A plurality of predetermined stored calibrated tone-reproduction curves are used, each predetermined stored calibrated tone-reproduction curve corresponding to a distinct media type and halftone type combination along with a plurality of predetermined relationships between each stored calibrated tone-reproduction curve and a reference media type and reference halftone type combination. A new tone-reproduction curve corresponding to a reference media type and reference halftone type combination calibration operation is generated, and each predetermined stored calibrated tone-reproduction curves based on the newly generated tone-reproduction curve corresponding to the reference media type and reference halftone type combination and the plurality of predetermined relationships between each stored calibrated tone-reproduction curve and the reference media type and reference halftone type combination is updated. The TRCs can be applied upon a page basis. Moreover, generated TRCs can be mapped to existing TRCs to save memory.
1. A method for updating individualized calibrated tone-reproduction curves, comprising:
providing a plurality of predetermined stored calibrated tone-reproduction curves, each predetermined stored calibrated tone-reproduction curve corresponding to a distinct media type and halftone type combination;
providing a plurality of predetermined relationships between each stored calibrated tone-reproduction curve and a reference media type and reference halftone type combination;
generating a new tone-reproduction curve corresponding to a reference media type and reference halftone type combination calibration operation; and
updating each predetermined stored calibrated tone-reproduction curves based on the newly generated tone-reproduction curve corresponding to the reference media type and reference halftone type combination and the plurality of predetermined relationships between each stored calibrated tone-reproduction curve and the reference media type and reference halftone type combination.
2. The method as claimed in claim 1 , further comprising:
comparing the newly generated tone-reproduction curve corresponding to the reference media type and reference halftone type combination to the predetermined stored calibrated tone-reproduction curve corresponding to the reference media type and reference halftone type combination; and
determining if there exists a difference between the newly generated tone-reproduction curve corresponding to the reference media type and reference halftone type combination and the predetermined stored calibrated tone-reproduction curve corresponding to the reference media type and reference halftone type combination;
said updating each predetermined stored calibrated tone-reproduction curves based on the newly generated tone-reproduction curve corresponding to the reference media type and reference halftone type combination and the plurality of predetermined relationships between each stored calibrated tone-reproduction curve and the reference media type and reference halftone type combination when a difference is determined.
3. The method as claimed in claim 1 , further comprising:
printing an image on a xerographic printing device using the updated predetermined stored calibrated tone-reproduction curves.
4. A method for updating individualized calibrated tone-reproduction curves, comprising:
providing a plurality of predetermined stored calibrated tone-reproduction curves, each predetermined stored calibrated tone-reproduction curve corresponding to a distinct media type and halftone type combination;
providing a plurality of predetermined relationships between each stored calibrated tone-reproduction curve corresponding to a first halftone type and a reference media type and first halftone type combination;
providing a plurality of predetermined relationships between each stored calibrated tone-reproduction curve corresponding to a second halftone type and a reference media type and second halftone type combination;
generating a new tone-reproduction curve corresponding to a reference media type and first halftone type combination calibration operation; and
updating each predetermined stored calibrated tone-reproduction curves corresponding to the first halftone type based on the newly generated tone-reproduction curve corresponding to the reference media type and first halftone type combination and the plurality of predetermined relationships between each stored calibrated tone-reproduction curve corresponding to the first halftone type and the reference media type and first halftone type combination.
5. The method as claimed in claim 4 , further comprising:
generating a new tone-reproduction curve corresponding to a reference media type and second halftone type combination calibration operation; and
updating each predetermined stored calibrated tone-reproduction curves corresponding to the second halftone type based on the newly generated tone-reproduction curve corresponding to the reference media type and second halftone type combination and the plurality of predetermined relationships between each stored calibrated tone-reproduction curve corresponding to the second halftone type and the reference media type and second halftone type combination.
6. The method as claimed in claim 4 , further comprising:
providing a plurality of predetermined relationships between each stored calibrated tone-reproduction curve corresponding to a third halftone type and a reference media type and third halftone type combination;
generating a new tone-reproduction curve corresponding to a reference media type and third halftone type combination calibration operation; and
updating each predetermined stored calibrated tone-reproduction curves corresponding to the third halftone type based on the newly generated tone-reproduction curve corresponding to the reference media type and third halftone type combination and the plurality of predetermined relationships between each stored calibrated tone-reproduction curve corresponding to the third halftone type and the reference media type and third halftone type combination.
7. The method as claimed in claim 4 , further comprising:
comparing the newly generated tone-reproduction curve corresponding to the reference media type and first halftone type combination to the predetermined stored calibrated tone-reproduction curve corresponding to the reference media type and first halftone type combination; and
determining if there exists a difference between the newly generated tone-reproduction curve corresponding to the reference media type and first halftone type combination and the predetermined stored calibrated tone-reproduction curve corresponding to the reference media type and first halftone type combination;
said updating each predetermined stored calibrated tone-reproduction curves corresponding to the first halftone type based on the newly generated tone-reproduction curve corresponding to the reference media type and first halftone type combination and the plurality of predetermined relationships between each stored calibrated tone-reproduction curve corresponding to the first halftone type and the reference media type and first halftone type combination when a difference is determined.
8. The method as claimed in claim 4 , further comprising:
printing an image on a xerographic printing device using the updated predetermined stored calibrated tone-reproduction curves.
9. A system for updating individualized calibrated tone-reproduction curves, comprising:
a storage device to store and provide a plurality of predetermined stored calibrated tone-reproduction curves, each predetermined stored calibrated tone-reproduction curve corresponding to a distinct media type and halftone type combination;
said storage device storing and providing a plurality of predetermined relationships between each stored calibrated tone-reproduction curve and a reference media type and first halftone type combination;
tone-reproduction curve means for generating a new tone-reproduction curve corresponding to a reference media type and first halftone type combination calibration operation; and
a processor to update each predetermined stored calibrated tone-reproduction curves based on the newly generated tone-reproduction curve corresponding to the reference media type and first halftone type combination and the plurality of predetermined relationships between each stored calibrated tone-reproduction curve and the reference media type and first halftone type combination.
10. The system as claimed in claim 9 , wherein:
said processor compares the newly generated tone-reproduction curve corresponding to the reference media type and first halftone type combination to the predetermined stored calibrated tone-reproduction curve corresponding to the reference media type and first halftone type combination;
said processor determines if there exists a difference between the newly generated tone-reproduction curve corresponding to the reference media type and first halftone type combination and the predetermined stored calibrated tone-reproduction curve corresponding to the reference media type and first halftone type combination;
said processor updates each predetermined stored calibrated tone-reproduction curves based on the newly generated tone-reproduction curve corresponding to the reference media type and first halftone type combination and the plurality of predetermined relationships between each stored calibrated tone-reproduction curve and the reference media type and first halftone type combination when a difference is determined.
11. The system as claimed in claim 9 , wherein:
said storage device stores and provides a plurality of predetermined relationships between each stored calibrated tone-reproduction curve corresponding to a first halftone type and a reference media type and first halftone type combination;
said storage device stores and provides a plurality of predetermined relationships between each stored calibrated tone-reproduction curve corresponding to a second halftone type and a reference media type and second halftone type combination;
said tone-reproduction curve means generates a new tone-reproduction curve corresponding to a reference media type and second halftone type combination calibration operation; and
said processor updates each predetermined stored calibrated tone-reproduction curves corresponding to the second halftone type based on the newly generated tone-reproduction curve corresponding to the reference media type and second halftone type combination and the plurality of predetermined relationships between each stored calibrated tone-reproduction curve corresponding to the second halftone type and the reference media type and second halftone type combination.
12. The system as claimed in claim 9 , wherein:
said storage device stores and provides a plurality of predetermined relationships between each stored calibrated tone-reproduction curve corresponding to a first halftone type and a reference media type and third halftone type combination;
said storage device stores and provides a plurality of predetermined relationships between each stored calibrated tone-reproduction curve corresponding to a third halftone type and a reference media type and third halftone type combination;
said tone-reproduction curve means generates a new tone-reproduction curve corresponding to a reference media type and third halftone type combination calibration operation; and
said processor updates each predetermined stored calibrated tone-reproduction curves corresponding to the third halftone type based on the newly generated tone-reproduction curve corresponding to the reference media type and third halftone type combination and the plurality of predetermined relationships between each stored calibrated tone-reproduction curve corresponding to the third halftone type and the reference media type and third halftone type combination.
13. The system as claimed in claim 9 , further comprising:
a xerographic printing device using the updated predetermined stored calibrated tone-reproduction curves to print images.