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Originally Posted by dhoizner
Duee to height constraints and mounting problems, we are limited to a height difference between the target and the camera of 7 inches...
...Can this problem be attributed to the smallness of the height difference?
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Yes, you're going to want to mount the camera as low as possible. As Ken pointed out, mounting the camera at the same height as the light will mean that the tilt angle will never need to change, which will prevent you from determining the distance. As the angular values I included in terminal.c are for the prototype pan/tilt mechanism I used, you should verify these values to wring-out the maximum accuracy from your particular pan/tilt mechanism.
-Kevin