关键词: 图像去噪, P-M模型, shock滤波器, 自适应边缘增强

Abstract: P-M model is an image smoothing method in which diffusion PDEs are used to realize not only image denoising but also preserving image edge character by the diffusion coefficient adjusted with image grads.For furthermore improving the image visual effect，the inverse diffusion is wished to make nearby the image edge，in order to enhance the edge character.Therefore，an adaptive edge enhancement P-M model is proposed.In this modified P-M model，edge enhancement based on shock filter is realized by setting the inverse diffusion coefficient also adjusted with image grads.The experiment results show that compared with the traditional P-M model，the modified P-M model can get not only better visual effect but also bigger PSNR.

Key words: image denoising, P-M model, shock filter, adaptive edge enhancement