The Open Mechanical Engineering Journal

2014, 8 : 37-41
Published online 2014 March 21. DOI: 10.2174/1874155X01408010037
Publisher ID: TOMEJ-8-37

Modified Perona-Malik Equation and Computer Simulation for Image Denoising

Zheng Jian Feng , Huang Chengwei and Zhang Ji
Changzhou University, Chang Zhou, 21300, China.

ABSTRACT

The edges and textures of a digital image may be destroyed by traditional denoising methods, which is a difficult problem in image denoising. In this paper, anisotropic diffusion algorithm based on Partial differential equation is studied. First, image denoising algorithms based on Perona-Malik model are studied. Second, a modified Perona-Malik model is proposed. In the proposed model, the gradient statistic and edge thresholds are embedded into the Perona-Malik equation. Finally, the effects of this model and some other models are compared and analyzed. The experimental results show that the proposed modified Perona-Malik model outperforms the original Perona-Malik model in removing Gaussian noise, and the edges and textures of the image are well preserved.

Keywords:

Computer simulation, Image denoising, Partial differential equation, Perona-Malik model.