Cross-talk Reduction in Visual Sensor Systems
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Solution Overview
Problem
Visual sensor systems, such as human visual systems and night vision systems, experience cross-talk due to overlapping sensitivity regions, leading to unwanted stimulation and incorrect image perception, especially when using RGB displays where red components are mixed, causing items to appear in night vision goggles even if they shouldn't.
Innovation Solution
A system comprising one or more projectors and a controller that determines the night vision sensor system's intensity component of RGB images using its response curve and reduces the intensity of infrared images by multiplying the response curve with spectral radiance curves of light sources and summing the results, allowing concurrent display of images viewable by both systems without cross-talk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If RGB display system is used to provide images viewable by human visual system, then the human visual system can see the appropriate information, but the night vision sensor system is stimulated by red components causing cross-talk
Solution Approach 1:
The patent modifies the intensity parameters of the infrared image based on the calculated NVIS intensity component from the HVS image. By dynamically adjusting the infrared image intensity using the response curve data, the system reduces cross-talk while preserving necessary information for night vision display.
2Adaptability or versatility
If separate image generators are used for HVS and NVIS systems, then each system can have optimized image content, but the NVIS image generator cannot account for the color and brightness of the HVS image leading to cross-talk
Solution Approach 1:
The system uses the HVS image data as feedback to adjust the NVIS image generation. The controller calculates the NVIS intensity component from the HVS image and uses this information to modify the infrared image intensity, creating a feedback loop that prevents cross-talk while maintaining system-specific optimizations.
Solution Approach 2:
The patent treats the HVS and NVIS systems asymmetrically by allowing the HVS image to influence the NVIS image generation, but not vice versa. This asymmetric relationship enables the NVIS system to adapt to the HVS content without requiring bidirectional coordination.
3Adaptability or versatility
If red components are mixed in RGB display to create all colors, then the display can show full color gamut, but items containing red will appear in night vision goggles even when they shouldn't
Solution Approach 1:
The system selectively adjusts the intensity parameter of the infrared image in regions where red components are present in the HVS image. By using the response curve to calculate the NVIS intensity component, the system reduces infrared intensity only where necessary to prevent red from appearing in NVIS, while preserving full color gamut for HVS display.
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
Effectively reduces the intensity of images viewable by night vision systems, ensuring that only intended information is displayed, improving user experience and safety in environments like flight simulators by minimizing incorrect wavelength sensitivity overlap.
Implementation Method 1
multiplying the response curve by each spectral radiance curve of one or more of: each light source of a first projector configured to provide the first images; and the first images
Implementation Method 2
determine a second visual sensor system intensity component of the first images using a response curve of the second visual sensor system
Implementation Method 3
a display device comprising one or more projectors configured to provide first images, viewable by a first visual sensor system, and second images, viewable by a second visual sensor system
Data Source
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AI summary
A device, system and method of cross-talk reduction in visual sensor systems is provided. A display device is configured to provide first images viewable by a first visual sensor system, and second images, viewable by a second visual sensor system. The first images and the second images have common features which align when the first images and the second images are provided concurrently. The first images comprise wavelengths viewable by the second visual sensor system. A controller determines a second visual sensor system intensity component of the first images using a response curve of the second visual sensor system. The controller reduces intensity of the second images provided at the display device by the second visual sensor system intensity component of the first images, at least when the first images and the second images are concurrently provided.