Multi-Projector Color Correction via Camera Imaging
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Solution Overview
Problem
Existing display systems with multiple projectors face challenges in achieving accurate color reproduction due to differences in projector operation characteristics, necessitating a method to generate effective color correction data.
Innovation Solution
A control device that projects first images onto a shared area and uses imaging data from a camera to generate color correction data, ensuring each projector adjusts its images to match target colors, thereby correcting color discrepancies across multiple projectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If color correction data is generated using conventional methods for multiple projectors, then color accuracy can be improved, but the time required for calibration increases significantly
Solution Approach 1:
The patent divides the color calibration process into two distinct phases: a one-time initial calibration that captures projector characteristics, and subsequent rapid color corrections that reuse this data. This segmentation allows the time-consuming measurement phase to be performed once, while color adjustments can be made quickly afterward without repeating full calibration procedures
Solution Approach 2:
The system performs preliminary color characterization measurements during an initial calibration phase, storing the projector-specific color characteristics in advance. When color corrections are needed later, the system retrieves and applies the pre-stored characteristics data, eliminating the need to perform time-consuming measurements again and enabling rapid color adjustment
2Measurement precision
If each projector adjusts colors individually based on separate calibration, then color accuracy for each projector improves, but the complexity of the calibration process increases
Solution Approach 1:
The patent merges the color calibration data from multiple projectors into a unified color correction framework. Instead of treating each projector's calibration as a separate complex process, the system combines their characteristics and applies coordinated color corrections, reducing overall system complexity while maintaining individual projector accuracy
Solution Approach 2:
The system creates a digital model or copy of each projector's color characteristics during initial calibration. These copied characteristics are then reused for generating color correction data, eliminating the need to perform physical recalibration measurements each time color adjustments are needed, thereby simplifying the calibration process
Data Source
AI summary
A method of operation of a control device configured to control a plurality of projectors including the steps of making each of the plurality of projectors projects one or more first images based on first image information to a first area, and generating color correction data used to correct a color of images projected by the plurality of projectors based on imaging data generated by a camera imaging the first area where the first images are projected by the plurality of projectors.