Does anyone have an opinion on using the Visible Atmospherically Resistant Index (VARI) for analyzing agricultural plant health? This can use a standard RGB camera. Obviously not NDVI but comparing "greeness" can be a plus. What software is available to calculate this from an image?
I would like to use a quadcopter with the standard (RGB) camera to capture field images and compare the relative "greenness" to be able to quickly see variation in a field.