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Sep 29, 2012, 01:28 AM
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Networking wars

So the easiest way to have the ground camera & aircraft on a wireless network was to make the aircraft an access point & hard code the ground camera as associated. The aircraft has the lowest latency link to the tablet & the ground camera doesn't need full duplex, which doesn't work.

All the data from the ground camera needs to go through the aircraft. The address manipulation required to do the packet forwarding is unknown & complicated.

A little BJT magic got the LED flashing without a tether. The IR receiver has a timeout which is just slightly longer than the duration the LED has to be on. If the framerate is any lower, it needs to toggle the LED in software.

The dual camera vision system made the 1st 3D test measurements & it was extremely high performing. 20Hz still looked fluid fast. Deriving the center of the blobs from the dimensions of the blobs & moving the servos gives the distance measurement more resolution than 640 pixels.

Thresholding the greyscale on the microprocessor has been successful at getting a high framerate mask. A software change could make it use a bicolor LED. Greyscale does 640x240. A bicolor LED would do 320x240 because there are only 320 color columns from the sensor.
Last edited by Jack Crossfire; Sep 29, 2012 at 02:46 AM.
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