EDR Projector Luminance Mapping for DCI Content Compatibility
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Solution Overview
Problem
Existing projectors, such as those specified by the Digital Cinema Initiative (DCI), have limited dynamic range and color space, which are outperformed by advanced high-performance projectors, leading to issues in displaying DCI-compliant content without artifacts like dark noise and dark contouring.
Innovation Solution
Employing dual or multi-modulation projection systems with a first modulator and a second modulator, utilizing MEMS arrays and DMDs, to process and render DCI image data on Enhanced Dynamic Range (EDR) projectors, ensuring compatibility and maintaining artistic intent while avoiding artifacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If advanced high-performance projectors with higher dynamic range and color space are used, then display performance is improved, but compatibility with DCI-compliant content deteriorates causing artifacts like dark noise and dark contouring
Solution Approach 1:
The system dynamically adjusts the luminance output parameters of the EDR projector to match the DCI standard range. By changing the operating parameters (luminance levels, contrast ratios) of the projector, it can display DCI-compliant content without generating artifacts while maintaining the ability to display native EDR content at full performance.
Solution Approach 2:
The system introduces an intermediate processing layer that acts as a mediator between DCI-compliant content and the EDR projector display. This intermediary layer performs tone mapping and luminance adjustment to ensure compatibility, preventing harmful artifacts while preserving the benefits of the enhanced display system.
2Illumination intensity
If the first modulator is set to maximum luminance ratio, then EDR performance is maximized, but DCI content compatibility is lost
Solution Approach 1:
The system implements dynamic switching between different operating modes. The first modulator can be dynamically adjusted between DCI-compliant luminance levels and maximum EDR luminance levels based on the content being displayed. This dynamic adaptability allows the same hardware to serve both DCI content compatibility and native EDR performance requirements.
Solution Approach 2:
The EDR projector system is designed with multi-functionality to handle both DCI-compliant content and native EDR content. By incorporating universal control mechanisms and adjustable luminance settings, the system can adapt to different content types and standards, making it versatile enough to maintain compatibility with legacy DCI content while providing enhanced performance for EDR content.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively displays DCI-compliant content on EDR projectors with improved contrast ratios and color gamut, providing a visually identical experience to standard DCI projectors without objectionable artifacts.
Implementation Method 1
setting the first modulator to a desired luminance level
Implementation Method 2
a second modulator, the second modulator being illuminated by light from the first modulator and capable of modulating light from the first modulator
Data Source
AI summary
Systems and methods of rendering DCI-compliant image data on Enhanced Dynamic Range (EDR) display systems are disclosed. One embodiment of an EDR projector system comprises a first modulator and a second modulator. One method for rendering DCI-compliant image data on an EDR projector system comprises: receiving input image data, said image data comprising a plurality of image formats; determining whether the input image data comprises DCI image data; if the input image data comprises DCI image data, then performing dynamic range (DR) processing on the DCI image data; and rendering the dynamic range processed DCI image data on the EDR projector system. One DR processing method is to set the first modulator to a desired luminance level—e.g., fully ON or a ratio of DCI max luminance to the EDR max luminance. In addition, a desired minimum level of luminance may be set for the EDR projector.