*2.4. Image Acquisition and Analysis*

Highly sensitive sCMOS cameras and filters with central bands of 482, 520, 680 and 760 nm were used to obtain the spectral data images of vegetation. Linear polarizers were used to obtain the polarization data images of vegetation with 0, 60 and 120 degrees. In this study, the spectral analysis focused on the absorption characteristics of chlorophyll in the central band near 680 nm and the reflection characteristics of chlorophyll in the central band near 760 nm, and the NDVI was used to retrieve the vegetation health status. The DoLP and AOP of vegetation were calculated using 0, 60 and 120-degree polarization images. Finally, the NDVI, DoLP and AOP were fused with the proposed fusion algorithm of night plant detection.
