Facsimile and static presentation processing – Static presentation processing – Attribute control
Reexamination Certificate
2003-08-01
2008-09-09
Poon, King (Department: 2625)
Facsimile and static presentation processing
Static presentation processing
Attribute control
C358S001100, C358S504000, C358S518000, C347S054000
Reexamination Certificate
active
07423778
ABSTRACT:
The present invention facilitates the calibration of printers and the color separation of input images into a set of inks by disclosing methods and systems for populating device-calibration lookup tables. The disclosed methods and systems rely on a comprehensive spectral prediction model predicting at a high accuracy the reflectance spectra of halftone ink patches. The spectral prediction model is composed of a first part predicting the reflection spectra as a function of physical (mechanical) surface coverages and of a second part comprising functions mapping nominal surface coverages to effective surface coverages for halftone patch wedges printed alone and halftone patch wedges printed in superposition with one or several solid inks. In addition, the disclosed methods and systems can be used to control printer actuation parameters in different types of printers e.g. liquid ink professional printers (offset, gravure, letterpress), electrophotographic printers, ink-jet printers, Thermal transfer printers and dye-sublimation printers.
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Collaud Fabien
Emmel Patrick
Hersch Roger David
Ecole Polytechnique Federale De Lausanne (EPFL)
Kau Steven
Poon King
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