Receiver Projector Camera Surface Compensation
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Solution Overview
Problem
Projectors used in receivers struggle to accurately project images due to ambient light conditions and inherent characteristics of the projection surface, leading to discrepancies in the visual experience compared to traditional television viewing.
Innovation Solution
A method employing a receiver with a projector, processor, and camera that captures images of the projection surface, derives a correction matrix based on its color properties, and applies it to the image data to compensate for ambient light and surface characteristics, ensuring a more accurate and consistent visual output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a projector is used to display images on an external projection surface, then the viewing experience becomes more immersive and alternative to traditional television, but the image quality deteriorates due to ambient light conditions and projection surface characteristics
Solution Approach 1:
The system uses a camera to capture the projected image and ambient light conditions, then feeds this information back to the processor which adjusts the projection parameters in real-time. This closed-loop feedback mechanism allows the projector to adapt to changing ambient light conditions and projection surface characteristics, maintaining image quality while providing an immersive viewing experience
Solution Approach 2:
The system dynamically changes projection parameters such as brightness, contrast, and color balance based on detected ambient light conditions and projection surface properties. By adjusting these parameters in response to environmental factors, the system maintains accurate image representation while adapting to different viewing conditions
2Measurement precision
If the projected image is adjusted to compensate for ambient light and surface characteristics, then color accuracy and brightness are improved, but the system complexity increases due to additional components and processing
Solution Approach 1:
The receiver performs multiple functions using integrated components: the camera serves both as a viewing feature and as a sensor for detecting projection surface characteristics and ambient light conditions; the processor handles both general signal processing and specialized color correction algorithms. This multi-functionality reduces the need for separate dedicated components, managing system complexity while achieving accurate color compensation
3Measurement precision
If automatic compensation for projection surface characteristics is implemented, then the projected image matches user expectations more closely, but the processing time and computational requirements increase
Solution Approach 1:
The system performs preliminary characterization of the projection surface by capturing an initial reference image and analyzing surface characteristics before actual content projection. This pre-processing step creates a compensation profile that can be applied quickly during normal operation, reducing real-time processing requirements while maintaining accurate color and brightness compensation
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
This approach enhances the visual experience by automatically adjusting projected images to match the user's expectations, providing improved color accuracy and brightness compensation, thus addressing the issues caused by ambient light and surface characteristics.
Implementation Method 1
capturing a visual image from the projection surface having said frame projected thereon
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
Disclosure is directed to providing projected output from a receiver that includes ambiance or environmental images and sounds for display to and/or listening by a user. Other aspects are directed to processing or altering program service video to produce a compensated video that is output by a projector component of a receiver. The modified image compensates for characteristics associated with the ambient light conditions and/or characteristics of the projection surface upon which the projector outputs an image.