FarnebackPrepareGaussian  130 modules/video/src/optflowgf.cpp     FarnebackPrepareGaussian(n, sigma, g, xg, xxg, ig11, ig03, ig33, ig55);
FarnebackPrepareGaussian  808 modules/video/src/optflowgf.cpp         FarnebackPrepareGaussian(n, sigma, g, xg, xxg, m_igd[0], m_igd[1], m_igd[2], m_igd[3]);