Infrared Sensor Flat-Field Correction for Thermal Drift
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Solution Overview
Problem
The acquisition of infrared images is significantly affected by natural factors such as wind and atmospheric pressure, leading to reduced temperature measurement accuracy and poor image fusion effects in image capturing apparatuses, especially after long-time operation.
Innovation Solution
An image fusion method that includes acquiring a trigger signal for flat-field correction, controlling a first image acquisition device to start a flat-field correction function, and obtaining a fused image during this process using both infrared and visible light images, with the first image acquisition device not outputting infrared images during correction to improve temperature measurement accuracy and fusion quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the first image acquisition device continuously operates to capture infrared images for fusion, then the image fusion continuity is maintained, but the temperature measurement accuracy deteriorates due to thermal drift and natural factors
Solution Approach 1:
The patent applies preliminary action by performing flat-field correction before normal image acquisition. The correction process is triggered by a trigger signal and completes before the first image acquisition device resumes capturing infrared images, ensuring temperature measurement accuracy is restored without disrupting the overall image fusion continuity.
Solution Approach 2:
The patent implements periodic action through periodic flat-field correction. The correction is performed at predetermined intervals or when triggered by specific conditions, allowing the system to maintain temperature measurement accuracy while continuing normal operation. The periodic interruption is brief and does not significantly affect image fusion continuity.
2Measurement precision
If flat-field correction is performed on the first image acquisition device, then the temperature measurement accuracy is improved, but the infrared image output is interrupted during the correction process
Solution Approach 1:
The flat-field correction is performed as a preliminary action before normal image acquisition resumes. The correction process prepares the detector for accurate temperature measurement by eliminating thermal drift effects, and is completed before the next infrared image is captured, minimizing the time loss.
Solution Approach 2:
The patent uses a trigger signal as an intermediary to coordinate the flat-field correction process. The trigger signal initiates the correction and manages the transition between correction mode and normal image acquisition, ensuring smooth operation and minimizing disruption to the overall process.
3Duration of action of stationary object
If the image capturing apparatus operates for a long time to maintain continuous monitoring, then the monitoring coverage is improved, but the temperature measurement accuracy deteriorates due to thermal drift
Solution Approach 1:
The patent applies periodic action by performing flat-field correction at predetermined intervals during long-term operation. This periodic maintenance of the detector ensures that temperature measurement accuracy is restored regularly, allowing the system to maintain both long monitoring duration and high measurement precision over extended periods.
Solution Approach 2:
The system uses feedback through the trigger signal mechanism to monitor operational status and initiate flat-field correction when needed. The feedback loop ensures that corrections are performed at appropriate intervals based on actual operating conditions, maintaining measurement accuracy throughout long-term monitoring.
Data Source
AI summary
An image fusion method includes acquiring a trigger signal for flat-field correction, controlling a first image acquisition device to start a flat-field correction function to perform a flat-field correction process on the first image acquisition device according to the trigger signal for the flat-field correction, and obtaining a fused image in the flat-field correction process according to an infrared image acquired by the first image acquisition device and a visible light image acquired by a second image acquisition device. The first image acquisition device does not output infrared images during the flat-field correction process.