Color signal conversion method for image copying
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United States of America Patent
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Sep 26, 1989
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N/A
app pub date -
Dec 17, 1987
filing date -
Dec 17, 1986
priority date (Note) -
Expired
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Abstract
In a color copier, color infidelities in the copied image resulting from overlapping spectral absorption characteristics of the cyan, magenta and yellow layers in the recording material and from the superposed spectral sensitivities of the red, green and blue decomposition systems in the reader/scanner of the original are compensated for by determining the mixture components in advance using a shade wedge, and subtracting such components during the copying process.
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