Angular Velocity Sensor Jitter Mitigation
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Solution Overview
Problem
High-resolution imaging systems face challenges in maintaining image quality due to angular jitter and vibrations, especially when mounted on moving platforms, as existing motion correction techniques fail to predict semi-chaotic motion with sufficient precision and mechanical stabilization systems react too slowly to effectively compensate for high-frequency vibrations.
Innovation Solution
An enhanced resolution imaging system that includes an angular velocity sensor system to detect changes in line of sight displacement, an image capture control circuit to activate exposure only when angular velocity is below a threshold, and an optional illumination source system to optimize image capture, thereby mitigating the effects of angular jitter and vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If mechanical stabilization systems are used to compensate for vibrations, then image stability is improved, but the system cannot effectively compensate for high-frequency vibrations due to slow reaction time
Solution Approach 1:
The patent replaces mechanical stabilization systems with an angular velocity sensor system that detects line of sight displacement changes and an image capture control circuit that activates exposure only when angular velocity is below a threshold. This substitution of mechanical systems with sensor-based detection and control logic enables the system to respond to high-frequency vibrations that mechanical systems cannot compensate for due to their slow reaction time.
2Productivity
If exposure is activated continuously to capture images, then image capture productivity is improved, but jitter-induced blur increases reducing image quality
Solution Approach 1:
The patent implements feedback by using an angular velocity sensor system to detect line of sight displacement changes in real-time and feeding this information to an image capture control circuit. The control circuit activates exposure only when the detected angular velocity is below a predetermined threshold, creating a closed-loop feedback system that maintains image quality while optimizing capture rate by preventing exposure during high-jitter periods.
Solution Approach 2:
The patent applies dynamics by making the exposure activation dynamic rather than continuous. The image capture control circuit dynamically adjusts exposure timing based on real-time angular velocity conditions, activating exposure only when conditions are favorable (angular velocity below threshold). This dynamic approach optimizes both productivity and image quality by adapting to changing vibration conditions.
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 effectively captures enhanced resolution images by controlling exposure and illumination based on real-time angular velocity data, reducing jitter-induced blur and improving signal-to-noise ratio, even in environments with significant platform vibrations.
Implementation Method 1
an angular velocity sensor system to detect changes in line of sight displacement
Data Source
AI summary
Some embodiments provide enhanced resolution imaging systems. These systems comprise: a mounting configured to secure with a vehicle; an electro-optical image capture system configured to sequentially obtain a series of frames per second; and a first jitter compensation system comprising: an angular velocity sensor system to detect velocity of change of line of sight angular displacement of the image capture system; and an image capture control circuit is configured to: receive, in real-time, angular velocity data from the angular velocity sensor system; identify, during the frame, when an angular velocity is less than an angular velocity threshold; and activate, during the frame, exposure of the image capture system to illumination for at least one of: at least a minimum integration period of time during the frame, and while the angular velocity is less than the angular velocity threshold during the frame.