Setup testbench to trade & develop:

• Image processing selection
  • My custom algos need help...so let's hold off on those
  • Let's use OpenCV built-in flavors
• Select a camera (limited to what's around the house)
  • didn't get PiCamera V2 on ribbon cable to work (maybe more reasons than this to abandon PiCamera V2...framerates too low?)
  • OpenCV captures webcam easily
• Rasp Pi receive & transmit SBUS serial from Quad's RF receiver and back to Flightcontroller
  • need inverter since SBUS is inverted UART
    • need 3.3v supply for inverter to keep SBUS thru inverter at 3.3v
    • 5v not good for Flightcontroller board (Omnibus F4)
• Rasp Pi to output analog video (composite) to Quad's VTX (video transmitter) so that the image can be seen on FPV goggle screen.
• Rasp Pi code to allow user to select region of interest square box on-screen.
  • Pass this to OpenCV tracking algo
• Rasp Pi code to pursuit guide Quad based on control algo
  • Based on error from boresight center
• Try to get at least 20Hz total loop time
  • C920 cam happens to go 30Hz in bright environment
  • Need to figure out SBUS repetition rate
  • Afraid of camera frame grab vs. incoming SBUS serial collisions causing time issues
  • Likely need 'threading'