Display Control for External and Natural Image Color Matching
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Solution Overview
Problem
Existing color adjustment methods for in-camera VFX fail to account for the mixed filming targets involving external display devices and real subjects, leading to color discrepancies due to steep spectral characteristics of LEDs and camera sensitivity differences.
Innovation Solution
A display control device that acquires image data, detects regions, generates color adjustment parameters, and applies color conversion to match the external display device region with the natural image region, using methods like CDL or LUT to ensure accurate color reproduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If LED wall is used as external display device, then high brightness and color gamut are achieved, but color accuracy deteriorates due to steep spectral characteristics
Solution Approach 1:
The patent applies parameter changes by adjusting color temperature and performing color space conversions to transform the LED wall's output characteristics to match camera sensitivity. This resolves the contradiction by modifying the optical parameters of the display device to achieve both high brightness and accurate color reproduction.
Solution Approach 2:
The patent introduces an intermediary color management system that acts as a mediator between the LED wall and the camera. This intermediary system performs color space transformations and calibration, enabling the LED wall to maintain high brightness while achieving accurate color matching with the camera's spectral sensitivity.
2Manufacturing precision
If color adjustment is performed on entire image, then color consistency is improved, but natural image region quality deteriorates due to unnecessary processing
Solution Approach 1:
The patent segments the image into external display device regions and natural image regions, applying color adjustment only to the external display device regions. This segmentation approach maintains color consistency where needed while preserving the original quality of natural image regions that do not require adjustment.
Solution Approach 2:
The patent applies local quality by performing color adjustment selectively on specific regions (external display device regions) rather than the entire image. This ensures that color consistency is improved in the display device regions while the natural image regions maintain their original quality without unnecessary processing.
3Manufacturing precision
If region detection is performed to enable selective color adjustment, then processing precision is improved, but system complexity increases
Solution Approach 1:
The patent performs preliminary actions by pre-defining region identification methods and color adjustment parameters before actual image processing. This preliminary preparation simplifies the main processing step, as the system only needs to apply pre-computed adjustments to pre-identified regions, reducing overall system complexity while maintaining high processing precision.
Data Source
AI summary
In a display device 100, image data having image regions corresponding to an external display device on which an image is displayed and to a subject different from the external display device is acquired. A detection unit 104 detects a first region corresponding to an image display region of the external display device from the image data. A parameter generation unit 103 generates color adjustment parameters for color matching between the detected first region and a second region corresponding to the subject. A color conversion unit 105 applies color conversion using the generated color adjustment parameters to the first region to perform color adjustment.