Adaptive Acquisition Control for Limited Luminance Motion Blur
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Solution Overview
Problem
Existing image capture devices face challenges in achieving high image quality in low-light or mid-light scenes with significant motion, due to hardware constraints that limit exposure duration and increase motion blur, affecting signal-to-noise ratio and color accuracy.
Innovation Solution
Implementing adaptive acquisition control with limited luminance motion blur reduction, which involves obtaining target scene exposition data, including gain and exposure duration values, and interpolating gain-exposure curves based on scene luminance and angular speed to optimize image capture settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If exposure duration is extended to improve image quality in low-light scenes, then signal-to-noise ratio is improved, but motion blur increases
Solution Approach 1:
The patent implements dynamic adjustment of exposure duration and gain based on real-time scene luminance analysis. The system divides the luminance range into multiple segments and selects different exposure durations and gain values for each segment, allowing the capture parameters to adapt dynamically to changing lighting conditions and motion levels, thereby optimizing the balance between signal-to-noise ratio and motion blur across varying scene conditions
Solution Approach 2:
The system changes key exposure parameters (exposure duration and gain) based on measured scene luminance values. By monitoring luminance and selecting from predefined parameter sets or interpolating between them, the system adjusts these parameters in real-time to maintain optimal image quality, improving signal-to-noise ratio when appropriate while limiting motion blur through controlled exposure duration
2Measurement precision
If gain is increased to improve image quality in low-light scenes, then signal-to-noise ratio is improved, but color accuracy deteriorates
Solution Approach 1:
The system carefully controls gain values based on scene luminance, selecting from predefined gain levels that balance signal amplification with color accuracy preservation. By interpolating gain values between predefined levels rather than using extreme values, the system achieves adequate signal-to-noise ratio improvement while minimizing color accuracy degradation
Solution Approach 2:
The gain parameter is dynamically adjusted based on real-time luminance measurements and the selected exposure duration. The system transitions between different gain levels smoothly, adapting to changing lighting conditions while maintaining color accuracy through controlled gain interpolation rather than abrupt changes
3Manufacturing precision
If exposure duration is extended to reduce motion blur, then image quality is improved, but frame rate decreases
Solution Approach 1:
The system dynamically adjusts exposure duration based on scene luminance and motion characteristics, selecting shorter exposure durations in brighter conditions or when high frame rate is prioritized, and longer exposures only when necessary for image quality. This dynamic adaptation allows the system to maintain acceptable motion blur reduction while preserving higher frame rates compared to fixed long-exposure approaches
Solution Approach 2:
The system changes exposure duration from fixed values to variable values selected from multiple predefined options or interpolated between them. By selecting appropriate exposure durations based on current scene conditions rather than using a single fixed value, the system optimizes the balance between motion blur reduction and frame rate maintenance
Data Source
AI summary
Adaptive acquisition control including limited luminance motion blur reduction for image and video acquisition and processing includes obtaining a target gain value and a target exposure duration value by obtaining a current scene luminance value, obtaining a current maximum gain using the current scene luminance value, obtaining a current interpolated gain-exposure duration curve using the current maximum gain and a current angular speed value, and obtaining the target gain value and the target exposure duration value from the current interpolated gain-exposure duration curve in accordance with a current maximum exposure duration. Adaptive acquisition control including limited luminance motion blur reduction for image and video acquisition and processing includes obtaining a frame of a video in accordance with the target scene exposition data and outputting the video.