An Overview of the Topological Gradient Approach in Image Processing: Advantages and Inconveniences

Figure 2

(a) zoom of the noisy Lena image (𝜎=20), (b) zoom of the restored Lena image using the nonlinear diffusion method, (c) zoom of the restored Lena image using topological gradient approach with the isotropic algorithm, and (d) zoom of the restored Lena image using topological gradient approach with the anisotropic algorithm.

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