Loading patent…
AssigneeLexmark International, Inc.
InventorsYao Han, Xuan-Chao Huang, Brant Dennis Nystrom, Richard Lee Reel
Estimating the term…
An electronic representation of the range of color combinations that can be displayed on the monitor is created and printed. The printed representation is then scanned by the scanner. A relationship is then identified between the monitor and the scanner. This relationship is then used as the basis to determine a relationship between the scanner and the monitor. Compensation is made for errors and the relationship is further developed. Finally, a scanner RGB to printer CMYK lookup table is built.
A method of calibrating a scanner in a system having a printer, a monitor, a CPU and a monitor-to-scanner lookup table, the calibration method comprising the steps of:
A computer program, on a computer usable medium for calibrating a scanner to a printer, the program comprising:
A method of calibrating a scanner in a system having a printer, monitor, and a monitor-to-printer relationship, the method comprising the steps of:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
Backward citations are indexed for grants only.
Matching two or more picture signal generators or two or more picture reproducers: using test pattern analysis
Controlled by characteristics of the picture signal generator or the picture reproducer: using test pattern analysis
Pictorial communication
Term end not estimated
None.
Not Applicable.
1. Field of the Invention
Referring to the accompanying drawings in which like reference numbers indicate like elements, FIG. 3 illustrates a flow chart of the present method. The major procedures of the present invention include: (1) Build monitor RGB to scanner RGB lookup table; (2) Build inverted scanner RGB to monitor RGB lookup table; and (3) Build scanner RGB to printer CMYK lookup table. In the first procedure, uniform cubic monitor RGB grids are sent to the printer to print color patches. These patches are then scanned with the scanner to build a monitor-to-scanner RGB lookup table. In the second procedure, the method developed in the present invention is used to invert the lookup table into a scanner-to-monitor RGB lookup table. Finally, the existing monitor-to-printer (MP) table is used to convert the inverted table into the final color table (i.e. a scanner-to-printer (SP) table). The second procedure is the major part of the present invention. The flowcharts of the whole process are shown in FIGS. 2 and 3.
I. Build Monitor RGB to Scanner RGB Lookup Table
The following steps are used to build a monitor RGB to scanner RGB lookup table: