基于纯各向异性扩散和四阶PDE的混合去噪方法研究

An image denoising method based on 4th order PDE and pure anisotropic diffusion

综合纯各向异性扩散模型和四阶PDE模型在图像去噪中的特点,提出一种新的去噪模型——基于纯各向异性扩散和四阶PDE的混合去噪模型.该模型克服了四阶PDE模型过多损失边缘信息和纯各向异性扩散模型在平滑区域产生阶梯效应的缺点,在有效去除噪声的同时,既抑制了阶梯效应,又很好地保持了图像的边缘和纹理细节信息.

This paper proposes an image denoising method based on 4th order PDE and pure anisotropic diffusion,which pure anisotropic diffusion can remove salt-pepper noises while protecting edges well and 4th order PDE can avoid staircase effects and protect the small veins.Our model solves the excessive diffusion problem at smooth regions in pure anisotropic diffusion model.Meanwhile,our model overcomes the shortage of 4th order PDE model that tends to lose much edge information.Our model solves image denoising,and keeps the edge and the veins detail information of the picture.