TY - JOUR TI - Optical flow for large motion using gradient technique AU - Sarker Hossain Mosharrof AU - Bechkoum Kamal AU - Islam K.K. JN - Serbian Journal of Electrical Engineering PY - 2006 VL - 3 IS - 1 SP - 103 EP - 113 PT- Article AB- In this paper, we present the gradient-based optical flow method that estimates the two-dimensional velocity of object motion. a multi-resolution smoothing operation proposes in this paper as a pre-processing step for overcoming the difficulty of large motion estimation by gradient-based optical flow techniques. the effectiveness of the proposed method has confirmed by applying image sequence of large motion experimental results with an image sequence show a qualitative improvement.