关键词: 图像放大, 偏微分方程, 各向同性扩散, 各向异性扩散, 综合模型

Abstract: For the problem of edge blurry caused by linear interpolation during usual image magnification, a comprehensive model is proposed, which adaptively combines linear diffusion with P-M equation by comparing pros and cons of isotropy and anisotropy diffusion models. In the image magnification, the non-smooth region is processed by anisotropy diffusion model and the smooth region by isotropy model. The experiments show that this model keeps edge sharpness, enhances the clearness of image, and significantly improves magnification image’s perception and objective SNR and PSNR.

Key words: image magnification, partial differential equations, isotropy diffusion, anisotropy diffusion, compreh-ensive model