Adaptive Exposure-Gain Control for Motion Blur Limited Imaging

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Solution Overview

Problem

Existing image capture devices face challenges in maintaining high image quality in low-light or mid-light scenes with significant motion, due to hardware constraints that limit exposure duration and introduce motion blur, affecting signal-to-noise ratio and color accuracy.

Innovation Solution

Implementing adaptive acquisition control with limited luminance motion blur reduction by interpolating exposure-gain curves based on scene luminance and angular speed, adjusting gain and exposure duration to optimize image capture, and incorporating auto-exposure and contrast control to enhance image quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If exposure duration is extended to improve signal-to-noise ratio in low-light scenes, then image brightness is improved, but motion blur increases

Engineering Contradiction:

Improveimage brightnessVSAvoidmotion blur

Core Design Contradiction:

Illumination intensityVSManufacturing precision

Solution Approach 1:

The patent applies dynamics by making the exposure duration and gain values adjustable and adaptive rather than fixed. The system dynamically selects exposure duration and gain based on scene luminance conditions, allowing optimization for both low-light brightness and motion blur reduction in different operating conditions

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes parameters (exposure duration and gain) based on scene luminance thresholds. By interpolating between different parameter sets for different luminance conditions, the system achieves optimal balance between brightness and motion blur reduction across varying light conditions

Inventive Principle:

Principle #35Parameter changes

2Reliability

If gain is increased to improve image quality in low-light scenes, then signal-to-noise ratio is improved, but color accuracy deteriorates

Engineering Contradiction:

Improvesignal-to-noise ratioVSAvoidcolor accuracy

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The patent changes the gain parameter based on scene luminance conditions. By interpolating gain values between different luminance thresholds, the system optimizes the balance between signal-to-noise ratio improvement and color accuracy preservation, applying higher gain only when necessary in low-light conditions

Inventive Principle:

Principle #35Parameter changes

3Manufacturing precision

If exposure duration is limited to reduce motion blur, then motion blur is reduced, but image brightness deteriorates

Engineering Contradiction:

Improvemotion blurVSAvoidimage brightness

Core Design Contradiction:

Manufacturing precisionVSIllumination intensity

Solution Approach 1:

The patent changes exposure duration based on scene luminance conditions. By interpolating exposure duration between different luminance thresholds, the system allows longer exposure in bright conditions (improving brightness) while limiting exposure in low-light conditions (reducing motion blur)

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses composite control by combining multiple parameters (exposure duration and gain) working together. The interpolated curves define composite relationships between these parameters, allowing the system to achieve both motion blur reduction and adequate brightness through coordinated parameter adjustment

Inventive Principle:

Principle #40Composite materials

4Reliability

If adaptive acquisition control with interpolated gain-exposure curves is implemented, then image quality is improved, but device complexity increases

Engineering Contradiction:

Improveimage qualityVSAvoidcontrol system complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by pre-defining multiple gain-exposure curves for different luminance conditions before actual image capture. The system interpolates between these pre-defined curves based on measured scene luminance, avoiding the need for complex real-time calculations during capture

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses scene luminance measurement as an intermediary to select and interpolate between pre-defined gain-exposure curves. This intermediary approach simplifies the control system by using a single measurable parameter (luminance) to drive the selection of optimal exposure and gain settings

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20260004539A1Limited Luminance Motion Blur Reduction

Publication Date: 2026.01.01 GOPRO INC

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.