研究目的
To solve the problem of dim targets detection in a sea background by leveraging the polarisation difference between the sea surface and ship targets.
研究成果
The proposed method significantly improves the contrast and local signal-to-noise ratio of dim targets in sea backgrounds by leveraging polarisation features and advanced image fusion techniques. The experimental results validate the effectiveness and reliability of the method.
研究不足
The method's effectiveness is dependent on the polarisation difference between the target and the background, which may vary under different environmental conditions. The model assumes a smooth sea surface and negligible reflected radiation from the sea surface, which may not hold in all scenarios.
1：Experimental Design and Method Selection:
A model combining the infrared reflected effect and emitted effect was developed to calculate the polarisation degree. The non-subsampled shearlets transformation (NSST) was used to fuse the intensity image and polarisation image.
2：Sample Selection and Data Sources:
Experiments were performed to measure the degree of polarisation of sea water and a small target at different viewing angles.
3：List of Experimental Equipment and Materials:
A long-wave infrared polarisation detection system was used to obtain the degree of polarisation (DOLP) images and the angle of polarisation (AOP) images.
4：Experimental Procedures and Operational Workflow:
The polarisation degree image and infrared intensity image were pre-processed, then fused using the NSST algorithm with specific fusion rules for low-frequency and high-frequency components.
5：Data Analysis Methods:
Image evaluation indices of target contrast with the background and local signal-to-noise ratio were used to evaluate the enhancement effect of fused images.
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