Abstract: The algorithm first calculates intersections of optical flow constraint line of the central pixel with constraint lines of its eight-connected pixels.From the eight intersection points,choose four points located in the middle position and close to each other.These four points correspond to four optical flow velocities of middle values. The four chosen points and the central pixel compose five-crediblepoints and their optical flow constraint equations compose a super determinant equation group.LeastSquares Method is used to calculate the optical flow velocity of the central pixel.such an approach results in higher computing efficiency and robustness.