Deslauriers-Dubuc Interpolating DownSampling Operator
[Beta,alfa] = DDDyadDown(afine,D,F,LEF,REF)
fine-scale samples
degree of polynomial fit in DD interpolation
filter implementing DD-interpolation
Left edge filter for DD-interpolation
Right edge filter for DD-interpolation
coarse-scale samples
detail corrections
Splits information afine on fine scale samples into coarse scale samples Beta and gen. midpoint deflections alfa.