System and method for a six-primary wide gamut color system
Inventors
Assignees
Publication Number
US-11600214-B2
Publication Date
2023-03-07
Expiration Date
2039-10-21
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Abstract
The present invention includes systems and methods for a six-primary color system for display. A six-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. The six-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.
Core Innovation
The invention provides a system and method for a six-primary color system for display, incorporating the primary colors Red, Green, Blue, Cyan, Yellow, and Magenta. Unlike conventional RGB systems, this system processes both a first set of color channel data (RGB) and a second set (CYM), integrates bit-level processing, and utilizes an image data converter with a digital interface to encode, decode, and convert image data. The system supports a variety of color standards, transfer functions, and is compatible with legacy interfaces through methods such as session description protocol (SDP) parameter modification.
The problem addressed by the invention arises from limitations in existing color systems, notably increased metameric errors (viewer-to-viewer color perception differences) and a restricted color gamut. Traditional systems expand color gamuts by pushing RGB primaries toward the limits of chromaticity space, which can cause increased viewer metameric errors, discrepancies in color sensation, and higher power demands. Moreover, existing multi-primary color systems restrict additional primary color data to internal proprietary display processing, lacking infrastructure for external acquisition, transport, or processing of six-primary color data.
The six-primary color system of the invention includes specific acquisition mechanisms (such as single imager cameras with inverting processes), optional optical filters for capturing and producing both standard and inverted color data, and standardized methods for packaging, mapping, and transporting six-primary color data across existing digital interfaces. The design ensures that both camera signal data and its inverted version (e.g., CYM derived from RGB) are managed with equal saturation values, and provides for protocol and bit-level compatibility to facilitate backwards compatibility and minimize system-level changes.
Claims Coverage
There are three independent inventive features in the patent claims.
Single imager camera system for six-primary color acquisition and inversion
A system comprising a single imager camera operable to capture a set of camera signal data, invert the data to create an inverted set with equal saturation values, and produce image data for a six-primary color system. The image data converter converts the image data for display and communicates with at least one display device. The camera system can produce both the original and inverted color signals with equal saturation values, enabling full six-primary color acquisition from a single imaging device.
Integration of session description protocol (SDP) parameters with six-primary image data workflow
A system wherein the image data flow from the single imager camera includes both the original and inverted camera signal data, and explicitly incorporates modifiable Session Description Protocol (SDP) parameters. The system ensures that SDP parameters are part of the workflow, enabling six-primary color system compatibility and facilitating communication of six-primary data formats between the camera, image data converter, and display device.
Gamma and white point consistency through camera signal inversion in six-primary workflow
A system in which the single imager camera is operable to eliminate inconsistencies in gamma transform tracking and white point designation in the set of image data. This inventive feature addresses and resolves gamma and white point tracking issues by leveraging symmetric inversion of camera signal data so that the original and inverted sets (used for the six-primary color system) have matched gamma and white point characteristics, thereby improving signal consistency for six-primary data processing and display.
The inventive features claim a single imager camera system capable of six-primary color acquisition and inversion, explicit integration of SDP protocol for six-primary color data communication, and mechanisms to achieve gamma and white point consistency through camera signal inversion.
Stated Advantages
Reduces metameric errors between viewers by doubling the number of color primaries and using wide spectrum primaries, resulting in more consistent and repeatable color perception across different viewers.
Extends the usable color gamut beyond what is offered by standard RGB systems, covering a larger gamut of real-world colors.
Facilitates backwards compatibility and interoperability with existing color systems and equipment by standardizing packaging, mapping, and transport of six-primary color data.
Minimizes system changes by allowing six-primary color data to be acquired, transported, and displayed using modified but familiar protocols and infrastructure, including session description protocol (SDP) and existing digital interfaces.
Enables elimination of inconsistencies in gamma transform tracking and white point designation in image data.
Documented Applications
Use in electronic display devices requiring an expanded, wide-gamut color system utilizing six color primaries (Red, Green, Blue, Cyan, Yellow, Magenta) for more accurate and consistent color reproduction.
Integration into imaging workflows, including single imager cameras and associated acquisition, transport, and display infrastructure, to enable external six-primary color data processing beyond proprietary or display-internal processing.
Updating or retrofitting of legacy display systems to display images in a six-primary color format while maintaining backwards compatibility with existing color systems and protocols.
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