Video Brightness Adjustment via Luma-Chroma Separation
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Solution Overview
Problem
In media rooms with low ambient lighting, users face difficulties in performing tasks due to poor visibility, such as navigating remote controls or grasping objects, as existing technologies do not effectively increase brightness levels in response to user needs.
Innovation Solution
A system and method that detect predefined user actions to automatically increase the brightness output of a display, adjusting image contrast and gamma correction to enhance visibility without causing clipping, thereby improving ambient lighting levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the display brightness is increased to improve ambient lighting in dark media rooms, then the visibility for user tasks is improved, but the image quality may deteriorate due to clipping and loss of detail in bright areas
Solution Approach 1:
The patent applies local quality by differentiating between luma (brightness) and chroma (color) components of the video signal. It selectively boosts only the luma component to increase ambient lighting, while preserving the chroma component to maintain image quality. This localized adjustment to specific signal components resolves the contradiction between improving illumination and maintaining manufacturing precision.
Solution Approach 2:
The patent segments the video signal into separate luma and chroma components for independent processing. By dividing the signal treatment, it can enhance brightness (luma) without affecting color information (chroma), thereby improving ambient lighting while preventing image quality degradation that would result from uniform signal amplification.
2Ease of operation
If the display brightness is increased to assist user tasks in low light conditions, then the ease of operation is improved, but the contrast and detail of the presented image may be lost
Solution Approach 1:
The patent changes the parameter of luminance (brightness) independently from other image parameters by adjusting the luma component. This selective parameter change enhances ease of operation in low light conditions while preserving image detail through maintained chroma information and controlled luma boosting that avoids clipping.
3Illumination intensity
If the gamma corrected Y′CbCr color space data is adjusted to increase brightness output, then the ambient lighting level is improved, but the dynamic range of the image may be compressed causing clipping
Solution Approach 1:
The patent applies local quality by targeting specifically the luma component within the Y′CbCr color space for brightness enhancement. This localized adjustment improves illumination intensity while preserving the full dynamic range of the original image data, preventing clipping that would result from comprehensive signal amplification.
Data Source
AI summary
Systems and methods are operable to increase brightness output from a display. An exemplary embodiment detects a predefined user action of a remote control, and then increases brightness of a currently presented image that is being presented on the display in response to detecting the predefined user action so that an ambient lighting level in the vicinity of the display is increased.