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METHOD AND APPARATUSES FOR PRINTER RECALIBRATION

8,009,324

8/30/2011 12:00:00 AM

A test pattern printed by a printer is assessed--without colorimetric equipment--to provide data used in recalibrating the printer. The assessment may be made by an unskilled operator, and can include discerning whether a particular pattern is visible in the printed test pattern, or whether a feature in the test pattern is relatively wider or narrower. From such assessment, needed changes to the printer's calibration data are inferred and implemented. A variety of other printer calibration techniques are disclosed. The technology is illustrated in the context of dye sublimation printers, and is particularly useful in optimizing printing of digitally-watermarked graphics.