Evaluation of the Efficiency of Robust Anisotropic Diffusion Schemes
نویسندگان
چکیده
The aim of the work presented in this paper is to investigate experimentally the behavior of different types of anisotropic diffusion schemes. The efficiency of the filters based on the anisotropic diffusion is determined to large extent by the properties of the conductance function in the PDE equation, which describes the diffusion process. Changing the shape of the conductivity function, we can tune the anisotropic diffusion filter to the image noise intensity and its statistical properties, in order to achieve optimal results of the image smoothing. This paper analyzes the behavior of the classical functions introduced by Perona and Malik together with the Tukey’s biweight and Huber’s minmax function introduced by Black et al. and compares the different filtering schemes with the standard approaches used for the reduction of Gaussian noise in digital images. keywords: image filtering, noise reduction, anisotropic diffusion
منابع مشابه
A Novel Spot-Enhancement Anisotropic Diffusion Method for the Improvement of Segmentation in Two-dimensional Gel Electrophoresis Images, Based on the Watershed Transform Algorithm
Introduction Two-dimensional gel electrophoresis (2DGE) is a powerful technique in proteomics for protein separation. In this technique, spot segmentation is an essential stage, which can be challenging due to problems such as overlapping spots, streaks, artifacts and noise. Watershed transform is one of the common methods for image segmentation. Nevertheless, in 2DGE image segmentation, the no...
متن کاملAnisotropic vector diffusion in image smoothing
Anisotropic diffusion has been widely used in image processing for its efficiency of smoothing the noisy images while preserving the sharp edges. In this paper we will explore a general version of anisotropic diffusion schemes for vectorvalued images, based on the polar-coordinate representation of the vectors. As an example, we will apply our method to color images and show its ability of edge...
متن کاملStudy of Discrete Duality Finite Volume Schemes for the Peaceman Model
In this paper, we are interested in the finite volume approximation of a system describing miscible displacement in porous media. This system is made of two coupled equations: an anisotropic diffusion equation on the pressure and a convection-diffusion-dispersion equation on the concentration of invading fluid. The anisotropic diffusion operators in both equations require a special care while d...
متن کاملRobust efficiency in data envelopment analysis with VRS technology
One of the fundamental problems in the classic DEA is lack of ability to distinguish unit's performance scores that is considered as a disadvantage. Recently, Parkan et al. [9] tried to address this problem. They proposed to assess each unit both optimistic and pessimistic views are taken into account. In contrast to traditional evaluation, one index is considered for each unit based on the l...
متن کاملImage Denoising Using Anisotropic Diffusion Equations on Reflection and illumination Components of Image
This paper proposes a new hybrid method based on Homomorphic filtering and anisotropicdiffusion equations for image denoising. In this method, the Homomorphic filtering extracts the reflectionand illumination components of a noisy image. Then a suitable image denoising method based onanisotropic diffusion is applied to each components with its special user-defined parameters .This hybridscheme ...
متن کامل