ENO/WENO Interpolation Methods for the ZOOMING of Digital Images

Abstract

In this paper we use interpolation methods like ENO and WENO techniques, generally used to solve hyperbolic PDEs, for the zooming process of digital images. The key idea lies at the approximation level, where a nonlinear adaptive procedure is used to automatically choose the locally smoothest stencil, hence avoiding crossing discontinuities in the interpolation procedure as much as possible. Our experiments show that the proposed method beats in quality pixel replication, bilinear and bicubic interpolation. Moreover our algorithm is competitive both for quality and efficiency with the other traditional techniques of zooming.

[DOI: 10.1685 / CSC06136] About DOI