HSV example: H:
.5-(R-B/B+R)/2, S: 1, V: 1
In the above example, the .5 value is the additive, and the multiplicative is the "/2", which doesn't change. I only varied the additive by 0.1, which just shifts the scale around the color wheel.
Here are the processed images, again with webcam first, Mobius second:
H:0.5-(R-B/B+R)/2 for both:
For the record, just storing the incorrectly done NDVI alternative originally posted on this note, which have since been corrected: http://publiclab.org/notes/warren/04-10-2014/mobius-action-cam-infragram-tests
Remember: these are WRONG! They essentially only show the red channel; due to order of operations, blue is cancelled out. Boo.
H:0.4-(R-B/B+R)/2 for both:
H:0.5-(R-B/B+R)/2 for the webcam,
H:0.4-(R-B/B+R)/2 for the Mobius: