Automatic calibration of halftones

Details Automatic calibration of halftones Automatic calibration of halftones

1995-12-28

1997-07-15

Rogers, Scott A.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358298, 358456, 358458, H04N 1405

Patent

active

056490739

ABSTRACT:
A calibration system, for calibrating a printer response to halftone images directed thereto, includes a test pattern, stored in a memory, providing a plurality of samples of combinations of printed spots, printable on a media by the printer; a gray measuring device, to derive a gray measurement of the samples of printed spots; a calibration processor correlating gray measurements with a particular combination of spots, and deriving parameters describing the printer response to the particular combination; generating at least one gray image correction, including a set of correction values selected in accordance with said the described printer response, and a calibration memory, storing the generated halftone patterns.

REFERENCES:
patent: 4149194 (1979-04-01), Holladay
patent: 5416613 (1995-05-01), Rolleston et al.
patent: 5457541 (1995-10-01), Burns
patent: 5463472 (1995-10-01), Neuhoff et al.
patent: 5469267 (1995-11-01), Wang
patent: 5473439 (1995-12-01), Pappas
patent: 5508826 (1996-04-01), Lloyd et al.
R. Floyd and L. Steinberg, "An adaptive algorithm for spatial grey scale," Proc. SID, vol. 17/2, 1976 pp. 75-77.
T. Papas, C.-K. Dong and D. Neuhoff, "Measurement of printer parameter for model-based halftoning", J. Elect. Img., vol. 2/3, 1993, pp. 193-204.
C. Rosenberg, "Measurement-based evaluation of a printer dot model for halftone algorithm tone correction," J. Elect. Img., vol. 2/3, 1993, pp. 205-212.
Clapper et al., "The Effect of Multiple Internal Reflections on the Densities of Half-Tone Prints on Paper" Jnl. Opt. Soc. of Am., vol. 43, No. 7, 1953, pp. 600-603.
Ruckdeschel et al. "Yule-Nielsen Effect in Printing: a physical analysis", Applied Optics, vol. 17,No. 21, Nov., 1978 pp. 3376-3383.
A. Murray, "Monochrome Reproduction in Photo-Engraving", Journal of the Franklin Institute, vol. 221, Nos. 1321-1326, pp. 721-744(1936).
J.A.C. Yule, et al., "The Pentration of Light into Paper and its Effect on Halftone Reproduction", TAGA Proc. 3, pp. 65-76 (1957).
Numerical Recipes in C, W. H. Press, et al., Cambridge University Press, pp. 60-71 (1988).

Affiliated with

Also associated with

Rating

Automatic calibration of halftones does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic calibration of halftones, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic calibration of halftones will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1498208