The spatial orientation method of oscillating orange was investigated. The under-damped oscillation model was used to denote orange oscillation process. FFT spectrum analysis method was used to determine the oscillation period of oscillating orange, and Fourier curve fitting method was used to determine the centroid coordinates of equilibrium point. The three-dimensional coordinates of equilibrium point were determined based on the centroid coordinates of left orange image and corresponding right orange image. According to oscillation period an...