Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1980-05-28
1982-08-24
Braun, Fred L.
Facsimile and static presentation processing
Static presentation processing
Attribute control
355 38, 355 77, G03F 308
Patent
active
043464025
ABSTRACT:
A color scanner for the graphic arts of the kind in which three uncorrected color-component analogue signals from the scanner are converted into digital form and are applied to the inputs of a three-dimensional look-up table or read-only memory in which are stored corresponding color-corrected signal values for the three colors and, if desired, for black. Individual one-dimensional color-component look-up tables are interposed between the analogue-digital converter and the three-dimensional look-up table. The functions performed by the one-dimensional tables may include logarithmic conversion of the input signals, for example. Preferably, further individual one-dimensional look-up tables are inserted between the outputs of the three-dimensional table and a digital-analogue converter preceding an output scanner.
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Braun Fred L.
Crosfield Electronics Limited
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