Based on partial differential equations (PDE)

we propose a novel image magnification approach which consists of oriented diffusion

fidelity term and shock filter. In a zoomed image

the blurring can be adjusted and the features be preserved by setting the coefficient of the fidelity term related to edges. The weighting of oriented diffusion and shock filter can be balanced through continuous function based on image content. Thus we adaptively combine the two kinds of PDE with minimum artifacts. Experiments demonstrate that the proposed adaptive coupling approach can achieve better result than traditional interpolation methods and other similar methods.