I am trying to develop a system to measure NDVI from the commercial grade digital camera.
I am trying to get two bands NIR and RED from the image and apply it for NDVI measurement using diffent filters. I also want to apply the Spectrometer reading on field to validate the NDVI measured from the Images.
Can anyone help me, how to correlate spectrometer reading(Normally Reflectance of the surface) and the image DN(Three Layer Image) ??