Image non-uniformity correction method and device, infrared image device and storage medium

By decomposing and reconstructing infrared images using wavelet transform, the non-uniformity problem of infrared focal plane array detectors is solved, enabling fast and clear image correction and reducing ghosting and information loss.

CN115293982BActive Publication Date: 2026-06-12YANTAI IRAY TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
YANTAI IRAY TECHNOLOGY CO LTD
Filing Date
2022-08-03
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

Infrared focal plane array detectors (IRFPAs) suffer from severe non-uniformity issues, resulting in fixed pattern noise (FPN) in infrared images. Existing correction methods struggle to balance the convergence speed and stability of the algorithm and are prone to ghosting effects.

⚗Method used

Wavelet transform is used to decompose the in-focus and out-of-focus images. The high-frequency components of the out-of-focus image are used to determine the noise components of the fixed image. The inverse wavelet transform is used to reconstruct the image, accurately decompose and represent the image details, and reduce the occurrence of ghosting.

🎯Benefits of technology

It effectively protects the edge components of the target scene, reduces ghosting, and quickly and clearly obtains images after non-uniformity correction, avoiding information loss and redundancy.

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Abstract

The image non-uniformity correction method and device, the infrared image device and the computer readable storage medium provided by the embodiments of the present application, the method comprises: acquiring a same group of in-focus images and out-of-focus images collected for a target scene; respectively decomposing the in-focus images and the out-of-focus images through wavelet transform to obtain corresponding in-focus sub-band images and out-of-focus sub-band images; determining a fixed image noise component contained in a high-frequency component in the out-of-focus sub-band images based on the high-frequency component; determining a corresponding image component estimation value according to a sub-band coefficient of the in-focus sub-band images and the corresponding fixed image noise component; reconstructing the image component estimation value through inverse wavelet transform to obtain a non-uniformity corrected image of the target scene, thus avoiding information loss and redundancy of the image signal in the decomposition process, so that the non-uniformity corrected image of the target scene is obtained more quickly and more clearly.
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