Velocity
- calculate the middle mass in frame 1
wait X seconds
calculate the middle mass in frame 2
speed = (mm_frame_1 - mm_frame_2) * distance / per_pixel
Lens radial distortion can be modelled by the following equations:
- x_actual = xd * (1 + distortion_constant * (xd^2 + yd^2))
y_actual = yd * (1 + distortion_constant * (xd^2 + yd^2))
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