“…Thus, C (r,s) ¼ {y (g,h) , (i,j) [ } consists of the input cDNA vectors x (i,j) and vectors y (g,h) outputted by the processing filter in the previous centers of the sliding window. Recursive filters have usually provided better smoothing compared to non-recursive filters at the expense of increased distortion (Burian and Kuosmanen, 2002). To keep the subsequent discussion simple, the conventional, non-recursive filtering formulation is adopted in the paper.…”