Moving-Body Imaging Blur Correction With Adaptive Exposure Control
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Solution Overview
Problem
Imaging systems on moving bodies suffer from blur due to camera movement during exposure, especially when the velocity of the moving body varies, leading to unclear images.
Innovation Solution
An imaging system with a blur correction assembly that aligns the optical path of reflected light using a pivotable mirror and a controller that adjusts exposure time based on the moving body's velocity and correctable blur amount to reduce blur.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If exposure time is extended to capture sufficient light, then image brightness is improved, but motion blur increases due to camera movement during exposure
Solution Approach 1:
The patent applies dynamics by making the mirror movable during exposure. The mirror pivots at a specific speed in the second half of the exposure period to counteract camera movement, allowing the system to maintain image clarity while using extended exposure times for sufficient brightness. This dynamic adjustment resolves the contradiction between brightness and clarity.
Solution Approach 2:
The patent implements preliminary anti-action by pre-calculating and applying a counteracting mirror movement before the harmful blur fully develops. The mirror pivots during the second half of exposure to compensate for the camera's movement, proactively preventing the blur that would otherwise occur during the extended exposure necessary for adequate lighting.
2Manufacturing precision
If exposure time is shortened to reduce motion blur, then image clarity is improved, but insufficient light capture results in poor image brightness
Solution Approach 1:
The system uses dynamic mirror pivoting to enable longer exposure times without sacrificing clarity. The mirror's movement during exposure compensates for camera motion, allowing the system to extend exposure for sufficient brightness while maintaining image sharpness through the counterbalancing optical path adjustment.
3Ease of operation
If a fixed exposure time is used, then device operation is simplified, but image quality varies significantly when moving body velocity changes
Solution Approach 1:
The patent implements feedback by using velocity detection to monitor the moving body's speed and automatically adjusting the mirror's pivot speed and exposure time accordingly. This closed-loop control maintains optimal image quality across varying velocities while keeping the operation automated and simple, resolving the contradiction between operational simplicity and adaptability.
Solution Approach 2:
The system changes parameters (exposure time and mirror pivot speed) based on detected velocity conditions. When velocity exceeds a threshold, the system adjusts these parameters to maintain image quality, enabling adaptability to different operating conditions while preserving ease of operation through automated control.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system captures clear images with proper exposure time by optimizing blur correction and light amount, ensuring reduced blurring and improved image quality.
Implementation Method 1
Blur is reduced by irradiating light onto an object to be imaged and causing light reflected on the object to be imaged to reflect on a mirror pivoting during predefined exposure time and fall on a camera
Data Source
AI summary
An imaging system located on a moving body includes an imaging device, a blur correction assembly, and a controller. The blur correction assembly that corrects blur in movement direction of the moving body when the imaging device captures images during movement of the moving body. The controller controls exposure time of the imaging device, based on a movement velocity of the moving body and a correctable blur amount by the blur correction assembly.