Image reproduction

Details Image reproduction Image reproduction

1982-11-24

1984-12-11

Masinick, Michael A.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 78, 358 80, H04N 146

Patent

active

044881711

ABSTRACT:
In the reproduction of colored images, the "white point", that is to say a point which determines which areas are to be printed with zero-ink, is a critical adjustment. In this invention, signals representing the three color components derived from the original are applied to a NAND gate (14) and when all of these signals simultaneously represent a zero printing color condition, the NAND gate generates a zero-ink signal. This is used to modify the zero-ink or white display on the monitor tube, for example by inhibiting passage of red and blue signals (18R, 18B) to the display tube while allowing the passage of green signals. The green signal to the monitor tube may be periodically interrupted, so that zero-ink areas are shown in pulsating green. The operator then adjusts the white point until the pulsating green areas correspond to the areas of the original which are to be reproduced with zero-ink.

REFERENCES:
patent: 4037249 (1977-07-01), Pugsley

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