I am currently comparing different types of Vegetation Indices, in this example I am using a NDVI formula and a TCARI formula. The NDVI result came out as expected with values ranging from +1 to -1. However the TCARI result came out with a different range. Kindly refer to the image below, illustrating the results of the TCARI Index before and after a bergwind hit a citrus farm. These images were obtained through use of an UAV and Micasense Rededge multispectral camera.
My question is, how do you interpret the values presented by TCARI? and how do you compare those values to that of NDVI?
I know the common range for green vegetation of NDVI is between 0.2 and 0.8, higher being more favourable. But how do I interpret TCARI without knowing the common range of values indicative of healthy vegetation?