Improved Global Motion Estimation Based on Iterative Least-Squares with Adaptive Variable Block Size
In order to reduce the convergence time in an iterative procedure, some gradient based preliminary processes are employed to eliminate outliers. The adaptive variable block size is also introduced to balance the accuracy and computational complexity. Moreover, the use of Canberra distance instead of Euclidean distance illustrates higher performance in measuring motion similarity.
global motion estimation adaptive variable block size iterative least squares preprocessing