Image scaling by de la Vall\'ee-Poussin filtered interpolation. (arXiv:2109.13897v2 [cs.CV] UPDATED)

We present a new image scaling method both for downscaling and upscaling,
running with any scale factor or desired size. The resized image is achieved by
sampling a bivariate polynomial which globally interpolates the data at the new
scale. The method's particularities lay in both the sampling model and the
interpolation polynomial we use. Rather than classical uniform grids, we
consider an unusual sampling system based on Chebyshev zeros of the first kind.
Such optimal distribution of nodes permits to …

arxiv cv image la scaling