I use DJI P4 multispectral. Here is the command I gave in opendronemap software.
–dem-resolution 1.5 --orthophoto-resolution 1.5
–orthophoto-png --dsm
–radiometric-calibration camera
–texturing-skip-global-seam-leveling
–pc-quality high
The reflectance values are very low. what might be the reason for this?