Method for automatically selecting color calibrations
AssigneeHeidelberger Druckmaschinen AG
InventorWinfried Werner
Life of this patent
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Abstract
In a method for automatically selecting color calibrations for digital color image recording, especially for digital photography or digital video recording in any lighting conditions, at least one color calibration is produced and stored by recording a calibrated color table. The color calibration which best resembles the color cast of a color image is selected on the basis of the correlation between the color cast parameters of the color image which is being recorded and the respective color calibration. In the event that no matching color calibration is found by comparing the color cast parameters, a standard color calibration is selected.
Claims11
A method for automatic selection of color calibrations for digital color image acquisition under arbitrary lighting conditions and for correction of take data of a color image with the color calibrations based on a color cast compensation and a color transformation, whereby it is not only neutral colors that are utilized for the color cast compensation, comprising the steps of:
- producing at least one color calibration by acquiring a calibrated color table under defined lighting conditions;
- implementing an analysis of the color cast of the take data of the color table and determining parameters that describe the color cast of the take data of the color table;
- undertaking a compensation of the color cast of the take data of the color table;
- calculating at least one color calibration from the color cast-corrected take data of the color table and storing it;
- storing the determined parameters of the color cast of the take data of the color table together with the color calibration;
- determining color cast parameters of the take data of the color image and comparing them to the stored color cast parameters of the color calibrations;
- and
- undertaking a selection of a color calibration on the basis of the comparison.
A method for the automatic selection of color calibrations for digital color image acquisition under arbitrary lighting conditions, and for correction of take data of a color image with the color calibrations on the basis of a color cast compensation, comprising the steps of:
- producing at least one color calibration by acquiring a calibrated color table under defined lighting conditions;
- implementing an analysis of the color cast of the take data of the color table and determining parameters that describe the color cast of the take data of the color table;
- undertaking a compensation of the color cast of the take data of the color table;
- calculating at least one color calibration from the color cast-corrected take data of the color table and storing it;
- storing the determined parameters of the color cast of the take data of the color table together with the color calibration;
- determining color cast parameters of the take data of the color image and comparing them to the stored color cast parameters of the color calibrations;
- and
- undertaking a selection of a color calibration on the basis of the comparison.
Dependencies are inferred from the claim text.