Stack Image Color Correction via Coordinated Dimming
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Solution Overview
Problem
Existing image processing methods for stack images, such as those displayed by multiple projectors, face challenges in optimizing light use efficiency and brightness while maintaining target chromaticity, often resulting in suboptimal light use and brightness degradation due to independent unevenness and color correction techniques.
Innovation Solution
An image processing method that controls dimming rates and performs color correction for each projector based on their specific dimming rates and color characteristics, treating them as a single unit to optimize light use efficiency and maintain target chromaticity, thereby adjusting luminance without wastefully decreasing light sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If independent unevenness correction and color correction are performed on each projector, then chromaticity accuracy is improved, but light use efficiency deteriorates and brightness is degraded
Solution Approach 1:
The patent merges the unevenness correction and color correction processes into a single integrated correction process. Instead of performing corrections independently on each projector, the system performs correction on the combined stack image, thereby improving light use efficiency while maintaining chromaticity accuracy.
Solution Approach 2:
The patent introduces a dimming rate parameter that is used to adjust the luminance of light sources in conjunction with color correction. By coordinating dimming rates with color correction parameters, the system achieves both energy efficiency and chromaticity accuracy simultaneously.
2Measurement precision
If correction is performed to match colors to target color, then chromaticity is improved, but brightness of the projector is degraded
Solution Approach 1:
The patent combines color correction with luminance adjustment by performing both operations simultaneously on the stack image. This integration allows the system to achieve target chromaticity while preserving brightness through coordinated correction of multiple projectors.
Solution Approach 2:
The patent uses dimming rates as a controllable parameter to adjust luminance independently of color correction. By varying dimming rates, the system can maintain color accuracy while optimizing brightness levels, avoiding the brightness degradation that occurs with traditional independent corrections.
3Use of energy by moving object
If dimming function is used to reduce power consumption, then energy efficiency is improved, but brightness is degraded
Solution Approach 1:
The patent introduces dimming rates as a controllable parameter that can be optimized alongside color correction. By coordinating dimming rates with correction parameters, the system achieves both low power consumption and high brightness through efficient use of light sources.
Solution Approach 2:
The patent merges dimming control with color correction operations, performing both luminance adjustment and color correction simultaneously. This integration allows the system to optimize both energy consumption and brightness by utilizing the combined output of multiple projectors more efficiently.
Data Source
AI summary
An image processing method, which performs color correction on a superimposed image obtained by superimposing a first image formed by a first image forming unit and a second image formed by a second image forming unit, includes controlling the dimming of the first image forming unit and the second image forming unit on the basis of dimming rates set in the first image forming unit and the second image forming unit in response to a given designated dimming rate, and performing a color correction process on image signals corresponding to the first image forming unit and the second image forming unit using a color correction value corresponding to the dimming rates of the first image forming unit and the second image forming unit.