IEEE TRANSACTIONS ON SIGNAL PROCESSING, v.50, no.12, pp.3028 - 3035
Abstract
Image/Video size conversion at variable rates requires that a large set of interpolation filters should be stored in a table. We present the interpolated Mth-band filters as the interpolation filters, which are obtained from the cubic spline interpolation of a prototype M(p)th-band eigenfilter. The proposed filter can be calculated in real time, eliminating the need for a large on-chip memory. Scaled images using the proposed filters show superb image quality.