Electronic Apparatus Luminance Adjustment for HDR Imaging
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Solution Overview
Problem
Conventional High Dynamic Range (HDR) techniques fail to consider environment conditions, resulting in poor frame quality, especially in strong backlight scenarios, as they cannot effectively adjust exposure settings to capture detailed images.
Innovation Solution
An electronic apparatus with a camera module and processor that captures a reference frame with multiple luminance values, calculates a weighted luminance value, and adjusts exposure settings based on a comparison with a luminance target to generate a better HDR frame, potentially reducing high luminance values above a threshold to improve image detail and variance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional HDR techniques capture frames with fixed exposure settings, then the device complexity is low, but the image quality deteriorates in strong backlight conditions
Solution Approach 1:
The patent implements feedback control by calculating the luminance value of the current frame, comparing it with a target luminance value, and adjusting the exposure setting based on the comparison result. This closed-loop feedback mechanism dynamically optimizes exposure settings to maintain appropriate luminance levels across varying scene conditions, resolving the contradiction between fixed simplicity and adaptive quality.
Solution Approach 2:
The patent transforms static exposure settings into dynamic adjustable parameters. The exposure setting is no longer fixed but changes adaptively based on real-time luminance measurements and environmental conditions. This dynamic adjustment allows the system to optimize image quality for different lighting scenarios while maintaining a relatively simple overall device architecture.
2Illumination intensity
If exposure settings are adjusted to capture bright areas, then the luminance range increases, but the detail in dark areas is lost
Solution Approach 1:
The patent changes the exposure parameter dynamically based on scene luminance characteristics. By adjusting the exposure setting according to the calculated luminance value and its comparison with the target, the system optimizes the balance between capturing bright areas and preserving detail in darker regions, preventing information loss while expanding the usable luminance range.
Solution Approach 2:
The patent applies partial adjustment to the exposure setting rather than extreme changes. By making moderate, calculated adjustments to the exposure based on luminance comparisons, the system achieves sufficient brightness in dark areas without overexposing bright areas, thereby preserving detail across the luminance spectrum while maintaining an appropriate luminance range.
3Manufacturing precision
If multiple frames are captured with different exposure settings, then the HDR frame quality improves, but the processing time increases
Solution Approach 1:
The patent implements dynamic determination of the number of frames to capture based on environmental conditions and luminance characteristics. Rather than always capturing a fixed number of frames, the system adaptively decides whether one frame suffices or multiple frames are needed, optimizing the balance between HDR quality and processing time according to the specific shooting scenario.
Solution Approach 2:
The patent changes the parameter of frame count dynamically based on scene requirements. By adjusting this parameter according to luminance analysis and environmental conditions, the system captures the minimum necessary number of frames to achieve acceptable HDR quality, thereby reducing unnecessary processing time while maintaining image quality standards.
Data Source
AI summary
Electronic apparatuses and adjustment methods thereof are provided. The electronic apparatus includes an input interface and a processor. The input interface is configured to receive a reference frame, wherein the reference frame corresponds to a plurality of luminance values. The processor is electrically connected to the input interface and configured to adjust at least a portion of the luminance values that are greater than a predetermined threshold, calculate a weighted luminance value of the reference frame according to the luminance values, generate a comparison result by comparing the weighted luminance value and a luminance target, and decide the luminance values according to the comparison result.