Methods and apparatus for calibrating a color display
AssigneeRah Color Technologies LLC
InventorRICHARD A. HOLUB
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Abstract
Improved methods are provided for calibrating color on a color display coupled to a computer, which are useful for obtaining calibrated data in a virtual proof network for enabling different color devices to render consistent color. Methods involve user interactions with screens on the display to set color display parameters. An apparatus is also provided for calibrating a sensor which may be used for measuring color of a display in one or more of these methods.
Claims19
1-6. (canceled)
A system of colorimetry of a sensor comprising:
- a color reference defining a mixture of a plurality of colorants, said mixture providing a spectral distribution;
- a sensor for measuring color of said reference in one or more channels, in which each of said one or more channels has a spectral response function;
- and
- one or more programs executable by a computer system for convolving the spectral response function of each of said one or more channels of said sensor with said spectral distribution defined by said reference to provide one or more values, and determining when said one or more values corresponds to the measurement of color of said reference by said sensor to provide one or more color coordinates of said reference in a Standard Observer coordinate system.
An apparatus for calibrating a sensor for video display colorimetry comprising:
- a source that provides spectrally variable light;
- a first sensor comprising a plurality of channels;
- a second sensor calibrated to enable CIE colorimetry traceable to a standard, wherein said first sensor and said second sensor receive light from said source;
- and
- a computer operable to execute programs to at least:
- control said source to provide said light in different wavebands, receive data from said second sensor representing measured light from said source in said different wavebands, determine a relationship between said data and amounts of light provided by said source of said different wavebands so as to calibrate said source, and calibrate said channels of said first sensor against said light from said calibrated source.
A method for calibrating a sensor for video display colorimetry comprising the steps of:
- providing a first sensor having one or more channels for detecting and a second sensor calibrated to enable CIE colorimetry traceable to a standard;
- controlling a source to provide light in different wavebands;
- measuring said light of said different wavebands from said source with the aid of said second sensor;
- determining a relationship between measurements of said light of said different wavebands by said second sensor and amounts of light provided by said source of said different wavebands to calibrate said light from said source;
- and
- calibrating spectral response functions of said channels of said first sensor against said light from said calibrated source.
Dependencies are inferred from the claim text.