Method and circuit arrangement for selective correction of hues and colors
Patent 4649423 Issued on March 10, 1987. Estimated Expiration Date: 
December 12, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 12, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesCircuit arrangement for recognizing and adjusting color components Determination of the standard color values of colors represented on a color monitor Patent #: 4307962 InventorsApplicationNo. 06/680775 filed on 12/12/1984US Classes:358/520Hue, saturation and luminanceExaminersPrimary: Masinick, Michael A.Assistant: Bauer, Robert M. Attorney, Agent or FirmInternational ClassH04N 1/62 (20060101)Foreign Application Priority Data1983-12-14 EPAbstractA method and circuit arrangement for selective correction of hues and colors in the production of color separations for polychromatic mixed printing. A hue signal identifying the hues of the scanned colors as well as a color saturation signal and a luminance signal are derived from the measured color value signals acquired when scanning the original. Hue signals, color saturation signals and luminance signals are limited such that they are respectively not equal to zero only for selectable regions. The region of the hue signal defines a hue to be selectively corrected, and all three regions of the signals define a color to be selectively corrected. At least one of the limited signals is combined with at least one of the unlimited signals to form the selective correction signals which are superimposed on the color signals to be corrected. | |
