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« on: October 24, 2012, 03:42:59 PM »
I'm doing exactly the same thing! I did see somewhere that you could printout targets for automatic ID, but I was under the impression that the pattern match relied on shape and texture. So they would have needed to be huge for un-ambiguous ID. But there is a semi-automated approach. I've figured this out with trial and error so I might not be 100% right:
1-In a spreadsheet, create a 4 column text file. the first column should be 'point N' and the other 3 the X,Y and Z
2- If possible, give a rough georefecence to your model. Camera positions from the UAV GPS are perfect for this.
3-Import this into photoscan (version 0.9+) and it should create a set of flags with estimated positions
4- From here I'm less certain but here's my best guess: Click on a GCP in the ground control panel
5- View photos, and sort by marker.
6- When you click on each photo and display it in the main window, you'll see at least 1 grey flag with the estimated position. Hopefully, it'll be close to your GCP. Drag it into place. It should go blue or green (Not sure about what the difference between blue or green is)
7- go through all the photos, then choose a new GCP and repeat!
PS actually updates the georeference as you go along. It's somewhat slow, but I remember the days where photogrammetry projects over 500 images required thousands of man/hours so I'm not coomplaining!
If you're attending the big meeting of the AGU in San Francisco in December, I'll have a session on topography generation and some UAV/photoscan stuff will be present.
Cheers
Patrice Carbonneau
Geography, Durham University, UK