PDE-based Image Interpolators
Young-Joon Cha, Seongjai Kim · 2007
We present a PDE-based interpolation algorithm to effectively reproduce high resolution im-agery. Conventional PDE-based interpolation methods can produce sharp edges without checker-board effects; however, they are approximators and tend to weaken fine structures. In order to overcome the drawback, a texture enhancement method is incorporated as a post-process of PDE-based interpolation methods. The post-process turns out to make the resulting algorithm an interpolator. It has been numerically verified that the resulting algorithm, called the PDE-based image interpolator (PII), restores sharp edges and enhances fine structures satisfactorily, outperforming the PDE-based skeleton-texture decomposition (STD) approach.