Local Ambient Compensation for Display Brightness and Contrast
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Solution Overview
Problem
Existing image and video display technologies struggle to accurately compensate for non-ideal viewing conditions such as ambient lighting, viewing angle, and viewer eye conditions, leading to suboptimal brightness and contrast adjustments that deviate from the creator's intended vision.
Innovation Solution
A method that determines an adjusted cone response based on a minimum target cone response and a delta cone response, calculates a target luminance through local adaptation pooling, and modifies the image accordingly to produce an adapted image that better matches the creator's intent under varying conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If overall brightness adjustments are made to compensate for ambient lighting, then the viewing experience under bright conditions is improved, but oversaturation occurs in areas that are already very bright
Solution Approach 1:
The patent applies local luminance adjustment instead of global brightness adjustment. It calculates a luminance compensation map that varies across different regions of the display, allowing each local area to be adjusted according to its specific ambient lighting conditions and content characteristics, thereby avoiding oversaturation in already bright areas while compensating for ambient light in other regions
Solution Approach 2:
The patent dynamically changes luminance parameters based on ambient lighting conditions, viewing angle, and content characteristics. It adjusts the luminance compensation factor in real-time according to measured ambient light levels and display orientation, optimizing the viewing experience without causing oversaturation
2Ease of operation
If manual brightness and contrast adjustments are made to overcome environmental effects, then the viewing experience is improved, but it becomes difficult to determine what settings match the content creator's original intent
Solution Approach 1:
The patent uses ambient light sensors to continuously measure ambient lighting conditions and feeds this information back to the display system. It also incorporates content analysis to understand the original luminance characteristics, automatically calculating compensation settings that maintain the creator's intent while adapting to environmental conditions
Solution Approach 2:
The system automatically adjusts brightness and contrast settings without requiring manual user intervention. It self-calibrates by measuring ambient conditions, analyzing content characteristics, and applying appropriate luminance compensation, thereby preserving the content creator's original intent while adapting to the viewing environment
3Adaptability or versatility
If display settings are adjusted to compensate for viewing angle and distance, then the viewing experience is improved, but the complexity of determining appropriate settings increases
Solution Approach 1:
The display system automatically detects viewing angle and distance using sensors and cameras, then self-adjusts the luminance compensation parameters accordingly. This eliminates the need for manual configuration and simplifies the user experience while maintaining adaptability to different viewing conditions
Data Source
AI summary
Novel methods and systems for locally adapting (modifying) an image to compensate for ambient conditions is realized. An adjusted cone response determining based on a minimum target cone response and a delta cone response. A target luminance is then calculated from a local adaptation pooling and the adjusted cone response. Then the image is modified by the target luminance to produce an adapted image.