IMPORTANT: Please add to interactive floor section

[donovan]

Hi!

I completely left out the part on how to calibrate the floor. It is
the most important part of the actual how-to.

============
Calibration
The following are the steps on how to calibrate the floor using tBeta
or Touchlib.

1. Start tBeta or Touchlib
2. Get a flashlight
3. Shine the flashlight on the floor and calibrate the filter of tBeta
or Touchlib to only see the flashlight. In other words, set rectify to
a rather high amount.
4. Turn of the flashlight, recapture background (press 'b') in tBeta
or Touchlib.
5. Press 'c' to bring up the calibration, then hit 'c' again to start
the calibration.
6. Aim the flashlight at the green cross with the red circle around
it.
7. Turn the flashlight on and turn it off again as quick as you can.
It should be as a quick flash. tBeta or touchlib should have picked it
up as if it was a touch to a normal screen.
8. Repeat step 6 until calibration is complete for all the crosses.
9. You should now have a quite accurate calibration.

Things to keep in mind while calibrating:
Try to stand clear of the camera's view area, this would interfere
with the calibration.
Try to get the flashlight as close as possible to the camera. In other
words, try to keep the light from the flashlight as close to a circle
as you can. If you stand at a very low angle compared to the camera
you'll see the flashlight making an elliptical light shape and thus
making the calibration less accurate and more difficult to get right.

If you can't get very close to the camera, calibration is still
perfectly possible, it will just take some extra time.

============

Thanks, that is quite an important part.

[Görkem Çetin]

Hi Donovan

Could you also write a short paragraph about how the system works? This is the only part lacking in your chapter I think..

I'll merge the following to your section.

Best
Görkem

2009/4/14 donovan <don...@whitespaced.co.za>