speeding up the slowest function .abs* (took 100ms for 600x600 image)
i replace it with extract-cdf* which takes 1ms.
the fft is quite fast with 5ms.
126 600x600 images with processing in 15.9s => 7.9fps
acquire simultaneously on the 3 cameras
add photograph of the new setup with 3 cameras, a photograph of the arduino board and one forgotten source file