Research on the Application of Hyperspectral Polarimetric Imaging Information for Camouflage Net Recognition

Polarization–spectral imaging information has theoretical advantages for camouflage-net recognition. However, for specific observation targets, the selection of effective spectral bands and polarization parameters, which are critical issues in engineering applications, remains unclear. Using a newly developed hyperspectral polarization imaging prototype, we conducted systematic outdoor observations of a grassland camouflage net placed over green grass at multiple viewing angles and different times of day. After evaluating and confirming the net’s camouflage effectiveness, we analyzed polarization-parameter spectral images of both the net and background under varying observation and solar altitude angles. The Fisher criterion was used to identify discriminative polarization parameters and spectral ranges. Effective bands were determined as S1 at 675–696 nm, S2 at 673–677 nm, S3 at 607–616 nm and 625–700 nm, DoP at 676–700 nm, and DoLP at 668–680 nm. Grayscale images in these bands further verified the separability of the camouflage net from grass. These results provide experimental evidence and wavelength-parameter references for engineering applications of polarization–spectral imaging in camouflage-net detection.