Method of calibrating a digital printer using component test pat

Details Method of calibrating a digital printer using component test pat Method of calibrating a digital printer using component test pat

1997-05-05

1998-05-05

Frahm, Eric

Facsimile and static presentation processing

Facsimile

Recording apparatus

358406, 358448, 358504, 382252, H04N 140, H04N 146, G06K 936

Patent

active

057483302

ABSTRACT:
A technique for calibrating the hardware and software of a digital printing apparatus relies on making seven component test patches which completely characterize the printing system, and then measuring the actual reflectance of these seven test patches. The measured reflectances are then converted, by the Yule-Nielsen equation, to values representative of the ink area coverage characteristic of each component test patch, because ink area coverage is the parameter that can be directly controlled by the digital printer. This conversion step takes into account the non-linear relationship between the reflectance of a halftone area and the amount of ink area coverage on the halftone area.

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"Novel Centering Method for Overlapping Correction in Halftoning," (Proceedings of IS&T, 47th Annual Conference, 1994, pp. 482-486).

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