Efficient image resizing using finite differences
Journal
IEEE International Conference on Image Processing
Journal Volume
3
Date Issued
1999-12-01
Author(s)
Abstract
We present an optimal spline-based algorithm for the enlargement or reduction of digital images with arbitrary scaling factors. This projection-based approach is realizable thanks to a new finite difference method that allows the computation of inner products with analysis functions that are B-splines of any degree n. For a given choice of basis functions, the results of our method are consistently better that those of the standard interpolation procedure; the present scheme achieves a reduction of artifacts such as aliasing and blocking and a significant improvement of the signal-to-noise ratio.
Type
conference paper