I have ROIs from a high resolution imagery and i want to compare it with Tasseled cap/NDVI/NDBI. My question is, if we to analyse the pixel values (lets say, 0.187) of Tasseled cap/NDVI/NDBI against those ROIs, and then classify these Tasseled cap/NDVI/NDBI using "Raster color slice in ENVI", then generated confusion matrix/kappa coefficient in this way is consider as "Correct" or not?
is this process acceptable scientifically or not?