Hello everybody. I really appreciate this useful and open-minded communtiy. I spent the last couple weeks reading many articles on NDVI photography and made some great progress with all the information provided on this site. Now I'm at a point at which I need some specific help from experts.
What I want to do
I'd like to make a big NDVI Map with my quadrocopter. The Idea is to support the farmers around me with useful information.
My attempt and results
I did make some progess with a proper white balancing and re-focusing the mobius action Cam. I managed to produce relatively accurate NDVI photos with the Infragram Sandbox-Tool and a custom HSV-Setting. The H-Value is [-(R-B)/(R+B)*4] ; S=V=1. You can see these results in the attachement.
Even though I've got some good results with the Infragram Sandbox, the resolution of my images gets really decreased. So I installed Ned Hornings PhotoMonitoring Plugin on Fiji to get the same result but with a much better resolution. Unfortunately I'm not able to reproduce these results. I can't include my custom HSV-Formula i used on the sandbox. I'm also not sure which .lut file and ColorIndex values I have to use to get the same results like on the sandbox. The best approximation i got is in the attachement.
Additionally I can't understand why in my picture with the sandbox high photosynthesis areas are gree represented and not red. I would be really thankful if somebody can support me.
Here you can see the scenery (taken with an iPhone).
Even tough a high NDVI value (red) represents high photosyntesis, it does exactly the opposite in my picture. green is high photosynthesis and blue/red is low as you can see. Why is that?