My first outdoor experiment with the ‘colour to get orientation’ project looks like its got promising results, but I need to auto-detect the ‘posts’ to get the ground-truth orientation. I might have to come up with a better idea and try again.
The following figure shows that it does seem like the colour changes (these are zoomed in on each of the tags in the first 49 flash photos). The first lot are 24m away, then the later dozen are from 16m away.
The puzzle is to get the ground truth orientation from the black-and-white sticks and then see if the colours relate to the orientation.