Srinivasan s `fast error search method: a small Octave/Matlab implementation of Srinivasan & Chellappa s FFT-based method for estimating the focus of expansion from optical flow. Does not include optical flow code.-Srinivasan s `fast error search　method: a small Octave/Matlab implementation of Srinivasan & Chellappa s FFT-based method for estimating the focus of expansion from optical flow. Does not include optical flow code.