System and method for a multi-primary wide gamut color system
Systems and methods for a multi-primary color system for display. A multi-primary color system increases the number of primary colors available in a color system and color system equipment. Increasing the number of primary colors reduces metameric errors from viewer to viewer. One embodiment of the multi-primary color system includes Red, Green, Blue, Cyan, Yellow, and Magenta primaries. The systems of the present invention maintain compatibility with existing color systems and equipment and provide systems for backwards compatibility with older color systems.
1. A system for displaying a primary color system, comprising:
a set of image data including a set of primary color signals, wherein the set of primary color signals corresponds to a set of values in an International Commission on Illumination (CIE) Yxy color space, wherein the set of values in the CIE Yxy color space includes two colorimetric coordinates (x and y) and a luminance (Y), and wherein the two colorimetric coordinates (x and y) are independent from the luminance (Y);
an image data converter, wherein the image data converter includes a digital interface, and wherein the digital interface is operable to encode and decode the set of values in the CIE Yxy color space;
at least one non-linear function for processing the set of values in the CIE Yxy color space, wherein the at least one non-linear function is not applied to the colorimetric coordinates (x and y), and wherein the at least one non-linear function is applied to the luminance (Y), thereby creating a luma (Y′); and
at least one display device;
wherein the at least one display device and the image data converter are in network communication; and
wherein the encode and the decode includes transportation of processed Yxy data, and wherein the processed Yxy data includes a first channel related to the luma (Y′), a second channel related to a first colorimetric coordinate (x) of the two colorimetric coordinates (x and y), and a third channel related to a second colorimetric coordinate (y) of the two colorimetric coordinates (x and y); and
wherein the image data converter is operable to convert the set of image data for display on the at least one display device.
2. The system of claim 1 , wherein the at least one display device is operable to display the primary color system based on the set of image data, wherein the primary color system displayed on the at least one display device is based on the set of image data.
3. The system of claim 1 , wherein the image data converter is operable to convert the set of primary color signals to the set of values in the CIE Yxy color space.
4. The system of claim 1 , wherein the image data converter is operable to convert the set of values in the CIE Yxy color space to a plurality of color gamuts.
5. The system of claim 1 , wherein the image data converter is operable to fully sample the processed Yxy data related to the luma (Y′) and subsample the processed Yxy data related to the two colorimetric coordinates (x and y).
6. The system of claim 1 , wherein the processed Yxy data related to the luma (Y′) and the two colorimetric coordinates (x and y) are fully sampled.
7. The system of claim 1 , wherein the processed Yxy data includes floating points.
8. The system of claim 1 , wherein the encode includes converting the set of primary color signals to XYZ data and then converting the XYZ data to create the set of values in the CIE Yxy color space.
9. The system of claim 1 , wherein the decode includes converting the processed Yxy data to XYZ data and then converting the XYZ data to a format operable to display on the at least one display device.
10. The system of claim 1 , wherein the at least one non-linear function includes at least one of a gamma function, a log function, a perceptual quantizer (PQ) function, an opto-electronic transfer function (OETF), an opto-optical transfer function (OOTF), and/or an electro-optical transfer function (EOTF).
11. The system of claim 1 , wherein the processed Yxy data is transported using a standardized transportation format.
12. The system of claim 11 wherein the standardized transportation format is operable to transport RGB data or YCbCr data.
13. A system for displaying a primary color system, comprising:
a set of image data including a set of primary color signals, wherein the set of primary color signals corresponds to a set of values in an International Commission on Illumination (CIE) Yxy color space, wherein the set of values in the CIE Yxy color space includes two colorimetric coordinates (x and y) and a luminance (Y), and wherein the two colorimetric coordinates (x and y) are independent from the luminance (Y);
an image data converter, wherein the image data converter includes a digital interface, and wherein the digital interface is operable to encode and decode the set of values in the CIE Yxy color space;
at least one non-linear function for processing the set of values in the CIE Yxy color space, wherein the at least one non-linear function is not applied to the two colorimetric coordinates (x and y), and wherein the at least one non-linear function is applied to the luminance (Y), thereby creating a luma (Y′);
a set of Session Description Protocol (SDP) parameters; and
at least one display device;
wherein the at least one display device and the image data converter are in network communication;
wherein the encode and the decode includes transportation of processed Yxy data, and wherein the processed Yxy data includes a first channel related to the luma (Y′), a second channel related to a first colorimetric coordinate (x) of the two colorimetric coordinates (x and y), and a third channel related to a second colorimetric coordinate (y) of the two colorimetric coordinates (x and y); and
wherein the image data converter is operable to convert the set of image data for display on the at least one display device.
14. The system of claim 13 , wherein the at least one non-linear function includes at least one of a gamma function, a log function, a perceptual quantizer (PQ) function, an opto-electronic transfer function (OETF), an opto-optical transfer function (OOTF), and/or an electro-optical transfer function (EOTF).
15. The system of claim 13 , wherein the image data converter applies one or more of the at least one non-linear function to encode the set of values in the CIE Yxy color space.
16. The system of claim 13 , wherein the image data converter applies one or more of the at least one non-linear function to decode the set of values in the CIE Yxy color space.
17. The system of claim 13 , wherein the image data converter includes a look-up table.
18. A system for displaying a primary color system, comprising:
a set of image data including a set of primary color signals, wherein the set of primary color signals corresponds to a set of values in an International Commission on Illumination (CIE) Yxy color space, wherein the set of values in the CIE Yxy color space includes two colorimetric coordinates (x and y) and a luminance (Y), and wherein the two colorimetric coordinates (x and y) are independent from the luminance (Y);
an image data converter, wherein the image data converter includes a digital interface, and wherein the digital interface is operable to encode and decode the set of values in the CIE Yxy color space;
at least one non-linear function for processing the set of values in the CIE Yxy color space, wherein the at least one non-linear function is not applied to the two colorimetric coordinates (x and y), and wherein the at least one non-linear function is applied to the luminance (Y), thereby creating a luma (Y);
a set of Session Description Protocol (SDP) parameters; and
at least one display device;
wherein the set of image data includes pixel mapping data, wherein the pixel mapping data is related to the luma (Y′) and the two colorimetric coordinates (x and y);
wherein the at least one display device and the image data converter are in network communication;
wherein the encode and the decode includes transportation of processed Yxy data, and wherein the processed Yxy data includes a first channel related to the luma (Y′), a second channel related to a first colorimetric coordinate (x) of the two colorimetric coordinates (x and y), and a third channel related to a second colorimetric coordinate (y) of the two colorimetric coordinates (x and y); and
wherein the image data converter is operable to convert the set of image data for display on the at least one display device.
19. The system of claim 18 , wherein the pixel mapping data includes a subsample of the set of values in the CIE Yxy color space.
20. The system of claim 18 , wherein the pixel mapping data includes an alignment of the set of values in the CIE Yxy color space.