# Questions tagged [anisotropic-diffusion]

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### Why is anisotropic diffusion useful in image processing?

I am working on anisotropic diffusion and the two coefficients proposed by Perona & Malik. I wanted to know what is the use of diffusion in image processing? Why is anisotropic diffusion ...
• 2,192
420 views

### main direction in 2D map of data

It may be a very simple question. We would appreciate any comments, guide or complete solution. We prefer however incomplete solutions but novel practical ideas. - How to find the main direction of ...
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8k views

### Comparison of Bilateral Filter and Anisotropic Diffusion

What are the advantages / disadvantages of bilateral filter and anisotropic diffusion for noise reduction? EDIT: To be more specific - what are the practical differences in terms of quality, speed or ...
• 67
614 views

### Which Anisotropic Diffusion Method is Best for Denoising Now?

The best standard may be varying from PSNR to human's visual feeling. Any one is OK. I have tested J.Weickert's tensor diffusion and P&M's, they all can't satisfy me. Is there any anisotropic ...
1k views

### Anisotropic Diffusion Outputs

I am providing 2 d grey scale images to the anisotropic diffusion function in MATLAB but not getting desired outputs. How many iterations are ideal and how should i approach this problem?I am keeping ...
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178 views

### Contour based blurring

Suppose I have an image of a cat and a binary mask image corresponding to cat's location as shown I would like to blur the image region surrounding the cat but as a function of distance from the cat'...
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### How to implement anisotropic diffusion using java?

I am working on an image processing project in java where we use anisotropic diffusion for scale space generation. In the below equation, after finding the diffusion value.using the second equation, ...
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### How are the edges of an image obtained with anisotropic diffusion?

I already know how to implement the method and obtain a correctly diffused image, but in the papers related to the topic there is usually an edge map that's calculated after the diffusion is performed ...
197 views

### What's the physical meanning and principle of applying anisotropic diffusion in transform domain？

I am reading several papers applying anisotropic diffusion in the transform domain like Shearlet, curvelet. All of them have got excellent results. The physical meaning and principle of applying ...
1 vote
109 views

### Perona Malik Noise Estimator using Canny

In Perona and Malik, they state: a histogram of the absolute values of the gradient throughout the image was computed, and K was set equal to the ...
1 vote
155 views

### Effect of Gaussian Smoothing to mean image intensity

I am implementing Perona-Malik Diffusion in using the formulas: Creating image at time k+1 using equation This is my implementation: ...
1 vote