Method and apparatus for improved color correction
View Patent ↗Methods and apparatuses for performing gamma corrections to maintain a plurality of colors substantially consistent with a color point. In one aspect of the present invention, a method to generate correction functions for performing color correction for a device for signals of different color components in a color space includes: generating a first correction function for a first color component in the color space; and generating second correction functions for second color components in the color space by reducing first color differences between a target White point and white points of a plurality of grays corrected by the first and second correction functions. The second color components are the color components in the color space other than the first color component. The first color differences are minimized relative to a chromaticity diagram.
1. A machine readable media containing executable instructions and data specifying correction values for performing gamma color correction for a device for signals of different color components in a color space, said executable instructions, when executed by a digital processing system, cause said digital processing system to perform a method comprising:
applying a first correction to a first color component in the color space to derive a first corrected color component, said first correction being specified by said data; and
applying a second correction to a second color component in the color space, said second correction being specified by said first corrected color component and said data;
wherein said data gamma corrects to maintain a substantially consistent white point over a plurality of gray levels from a white to a black;
wherein said data is generated without visually inspecting colors for comparison.
2. A media as in claim 1 wherein said device displays colors; and wherein said data is generated using both luminance and chromaticity values relative to said device.
3. A media as in claim 1 wherein said device displays colors and wherein said data is generated by modifying values of several color components interdependently.
4. A media as in claim 1 wherein said plurality of gray levels are displayable by said device.
5. A method of performing color correction with data specifying correction values for performing gamma color correction for a device for signals of different color components in a color space, the method comprising:
applying a first correction to a first color component in the color space to derive a first corrected color component, said first correction being specified by said data; and
applying a second correction to a second color component in the color space, said second correction being specified by the first corrected color component and said data;
wherein said data gamma corrects to maintain a substantially consistent color point over a plurality of colors from a first color to a second color;
wherein said data is generated without visually inspecting colors for comparison.
6. A method as in claim 5 wherein said device displays colors; and wherein said data is generated using both luminance and chromaticity values relative to said device.
7. A method as in claim 5 wherein said device displays colors and wherein said data is generated by modifying values of several color components interdependently.
8. A method as in claim 5 wherein said plurality of colors are displayable by said device.