Preprocessing

Reflectance transformation

import hsi
from hsi.preprocessing import make_reference, reflectance_calibration

img = hsi.open("path/to/file.hdr")
dark = hsi.open("path/to/dark_file.hdr")

white_ref = make_reference(img[:100, :, :])
dark_ref = make_reference(dark)

reflectance = reflectance_calibration(img, white_ref, dark_ref)