Abstract:

In order to improve the zoomed effect of the method based on partial differential equation, combining the improved complex diffusion model and the nonlocal means filter, the image enlargement method is proposed. Having the advantage of precision location of the edges, with the edges sharpened by the shock filter, the improved anisotropic complex diffusion couples to the nonlocal means filter to keep with the similarity of the diffused image, the high resolution image is reconstructed. Not only using the local information of the image but the image’s nonlocal information,the method makes the zoomed image more natural, at the same time, attenuates the edge’s over-sharpen, therefore the enlarged image has better visual effective. The simulations prove the prominent performance of the proposed method.