Patent ID: 6707854
Filing Date: 2004-03-16
Classification: H04N

Abstract:
A method for estimating motion between an incoming frame F(n) of a sequence of frames and a large static image M(nâˆ’1), said large static image being constructed from previous frames F(1) . . . F(nâˆ’1) of said sequence, said motion estimation method using a motion model based on a two-dimensional perspective transform containing eight motion parameters and comprising an optimization step of a cost function, characterized in that said eight motion parameters are the coordinates of the four vertices of the incoming frame, said vertices being successively moved in two directions to find an estimation of the motion parameters corresponding to an optimum of the cost function,wherein the cost function is defined by &Sum;p&it;12&it;wp&it;rp2where rp is a difference between original and predicted values of a pixel p and wp is a weighting coefficient.