Measurement and multi-channel fusion method of polarization hyperspectral for camouflage targets

To enhance the recognition of camouflaged targets in complex environments, this work employs polarization hyperspectral imaging to systematically examine the spectral response characteristics of four representative camouflage materials across multiple polarization channels. The contribution of each polarization channel (S1, S2, DOLP, and AOLP) is quantified relative to the non-polarized baseline using four spectral dissimilarity metrics: spectral angle (SA), root-mean-square error, spectral information divergence, and the red-edge spectral difference index. The results demonstrate that polarization information effectively enhances the spectral distinction between the camouflage materials and the grassland background, with the angle of linear polarization (AOLP) and the polarization difference channels (S₁ and S₂) exhibiting the most prominent effects. Based on these findings, channel fusion strategies centered on AOLP, S₁, and S₂ are proposed for different materials, and quantitative thresholds are established to improve the accuracy of practical camouflage target identification. This work provides a theoretical basis and methodological reference for the real-world application of polarization hyperspectral imaging in camouflage target detection.