Method and device for determining the area coverage of an original
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United States of America Patent
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Mar 3, 1998
Grant Date -
N/A
app pub date -
Mar 25, 1992
filing date -
Mar 25, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of determining area coverage of a printing original having printing areas and non-printing areas thereon, the printing areas being of a different color than that of the non-printing areas, the printing original having a location-dependent inhomogeneity independent of the area coverage, including optically scanning the original for determining a local diffuse reflection of a measured measuring field, the measuring result of the optical scanning being influenced by the inhomogeneity; determining at least two diffuse-reflection values from each measuring field, the diffuse-reflection values differing spectrally from one another in accordance with the color difference; and evaluating the two diffuse-reflection values and separating a component of the measuring result which is influenced by the area coverage, and a component of the measuring result which is influenced by the inhomogeneity; and the device thereof.
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Cited Art Landscape
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