Picture of mangrove trees
Hi there, this is actually my first time using SNAP. I have been trying to calculate NDVI value from pictures taken using a modified GoPro (lens was modded with NDVI red lens).
First of all, the bands are what you might find in a normal picture. There’s RGB and gray?. The lens blocks visible spectrum except for red and NIR.
When I tried the NDVI processor, I was confused about which band should I put in the red and NIR? My first guess is red = red, NIR = gray. The calculated NDVI gives out negative values, even on dense vegetation.
Am I doing the right procedure?