Spectral extrapolation in sub-band coding
C. Cafforio, Eugenio Di Sciascio, Cataldo Guaragnella · 2002
We examine how feasible it is to extrapolate high-pass terms from the low-pass sub-image obtained by sub-band decomposition. Only very simple techniques like morphological filtering and contours extraction have been considered at this first stage, attempting to synthesize from the low-pass sub-image the attenuated transitions. The results point out that there is room for further investigation and improvements.