Above is a compilation of all the camera board tests we did at LEAFFEST 2013 last weekend; I combined them into a single image to batch process with the Photo Monitoring Plugin for Fiji. Here are the results, with a well-organized PSD file at the end. The lead image is the "raw" version -- i.e. just what we got from the cameras.
This is the greyscale NDVI (click for full size):
This used the built-in "16color-lut" lookup table to colorize NDVI (click for full size):
Here's the full Photoshop file: leaffest-tests.psd (89 MB)
I'd like to use Chris Fastie's LUT which shows a clear cutoff between positive and negative values. In particular, the "JANE" camera did well on these tests, and that LUT tends to make that clear -- see how the dead leaves in the mixed sun JANE with Rosco 74 are negative, but the grass they're sitting on is positive -- while the bench is negative but the moss on the bench is positive:
That's encouraging -- it's distinguishing dead from healthy leaves, and moss from bench, which you can see in this normal image of the same scene at within a half hour of the JANE photo:
Here's a full breakdown of the JANE-74 image from mixed sun -- see how although dead leaves and grass are bright in the near infrared channel, the leaves are not absorbing much visible light, and are reflective in the blue channel:
Where can I get a copy of Chris's LUT?
Also, here's an animated GIF swapping between NDVI and raw, for the right half of the images: