| US 7,486,416 B2 | ||
| Inter-separation decorrelator | ||
| Edul N. Dalal, Webster, N.Y. (US); Wencheng Wu, Webster, N.Y. (US); Robert P. Loce, Webster, N.Y. (US); Raja Bala, Webster, N.Y. (US); Yeqing Zhang, Penfield, N.Y. (US); and Norman W. Zeck, Ontario, N.Y. (US) | ||
| Assigned to Xerox Corporation, Norwalk, Conn. (US) | ||
| Filed on Jun. 02, 2005, as Appl. No. 11/143,818. | ||
| Prior Publication US 2006/0274337 A1, Dec. 07, 2006 | ||
| Int. Cl. H04N 1/60 (2006.01); H04N 1/04 (2006.01); G03F 3/08 (2006.01); G06K 15/00 (2006.01); G06K 9/00 (2006.01) | ||
| U.S. Cl. 358—1.9 [358/515; 358/518; 358/504; 358/3.23; 382/162; 382/167] | 37 Claims |
| 1. A method for compensating for spatially dependent colorant appearance variations in output of an image rendering device,
the method comprising:
measuring spatial uniformity variations in a rendering process of the image rendering device;
identifying spatially dependent colorant interaction effects of the rendering process based on the measured spatial uniformity
variations;
isolating the identified spatially dependent colorant interaction effects mathematically;
determining a spatially dependent decorrelating function compensating for just the mathematically isolated spatially dependent
colorant interactions of the rendering process;
determining a color description of a desired color;
determining a spatial location description regarding a desired location of the desired color; and
processing the color description of the desired color through the spatially dependent decorrelating function according to
the spatial location description, thereby generating a color description compensated for colorant interactions associated
with the desired location of the desired color.
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