Image rapid stabilization method and device based on infrared image temperature excursion parameters

By acquiring and fitting the image noise temperature drift parameters of the infrared detector at different ambient temperatures, the rapid stability of the detector's target operating temperature and the image stable output are achieved, and the image temperature drift noise problem of the non-cooled infrared imaging system is solved, and the low power consumption and long-term stable imaging effect is achieved.

CN119756596APending Publication Date: 2025-04-04BEIJING INST OF TECH
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Patent Information

Application Number
CN202411709778.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-27
Publication Date
2025-04-04

AI Technical Summary

Technical Problem

Non-cooled infrared imaging systems are prone to image temperature drift noise when the operating temperature changes. The prior art uses high power consumption, slow temperature switching or short image stabilization time when suppressing noise.

Method used

By acquiring the image noise temperature drift parameters of the infrared detector at different ambient temperatures, the detector stable operating temperature curve without TEC was obtained, and based on this, the detector target operating temperature is achieved and the image stable output of the detector is achieved. If the ambient temperature changes rapidly, use the shutter to correct the image or adjust the target operating temperature of the detector to achieve real-time imaging.

Benefits of technology

It realizes a low-power, fast start-up and long-term stable infrared imaging system, which can quickly adapt to ambient temperature changes and reduce image noise.

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Abstract

The invention discloses an image rapid stabilization method and device based on infrared image temperature excursion parameters. The method comprises the following steps: firstly, collecting stable working temperatures of the infrared detector at different working environment temperatures under a TEC-free condition, and carrying out curve fitting to obtain an environment temperature-detector stable working temperature curve f (T) under the TEC-free condition; then according to the actual working environment temperature of the detector and the curve f (T), the target stable working temperature ttarget of the detector is determined; when the working temperature of the detector reaches the target stable working temperature ttarget, the working temperature of the detector is controlled to be the target stable working temperature ttarget by adopting TEC control; when the working environment temperature of the detector changes rapidly, whether the image noise temperature drift parameter corresponding to the environment temperature change value is smaller than or equal to a set threshold value or not is judged firstly, if yes, a TCE control mode is adopted, and if yes, a shutter image correction mode is adopted. According to the invention, image temperature output under quick start and quick temperature change is satisfied.
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