An Enhanced Fourth-Order PDE Model Based on Laplacian and Gradient Operator
Junhai Zhang, Liangchao Li, Jianyu Yang · 2012
An enhanced fourth-order PDE model is proposed in this paper. This model utilizes a parameter to control the image denoising process. The parameter consists of two parts, one is absolute value of the image's Laplacian, the other is the image's gradient magnitude. Experiment results demonstrate that this model can make a better trade-off between noise removal and edge preservation than others, and it can reduce the dissipation effects.